-
Hideo KITAGAWA, Yuji NAKASONE, Masuo SHIMODAIRA
1985 Volume 51 Issue 463 Pages
587-595
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Kazuhiko SAKAGUCHI, Toshikatsu NAOI
1985 Volume 51 Issue 463 Pages
596-603
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Kazuhiko SAKAGUCHI, Yoshiaki NAKAGAWA
1985 Volume 51 Issue 463 Pages
604-610
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Toshio YOSHINO, Toshihisa OHTSUKA
1985 Volume 51 Issue 463 Pages
611-620
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Hiroyuki KUMANO, Toshiyuki SAWA, Kazuya GONDA, Fujiya KANAI
1985 Volume 51 Issue 463 Pages
621-629
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Hideo KOGUCHI, Yukio HORI
1985 Volume 51 Issue 463 Pages
630-637
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Tomoaki TSUJI, Toshikazu SHIBUYA, Takashi KOIZUMI
1985 Volume 51 Issue 463 Pages
638-647
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Hironobu NISHITANI, Dai-heng CHEN
1985 Volume 51 Issue 463 Pages
648-659
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Hirouki KISU, Ryoji YUUKI, Hideo KITAGAWA
1985 Volume 51 Issue 463 Pages
660-669
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Sumio MURAKAMI, Nobutada OHNO, Hitoshi TAGAMI
1985 Volume 51 Issue 463 Pages
670-678
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Toshiyuki SAWA, Hisanori MARUYAMA
1985 Volume 51 Issue 463 Pages
679-687
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Yasushi MIYANO, Shozo NAKAMURA, Kazuo KANEO, Takeshi KUNIO
1985 Volume 51 Issue 463 Pages
688-696
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Yukio UEDA, Keiji FUKUDA, You Chul KIM, Tosihisa YAMAZAKI
1985 Volume 51 Issue 463 Pages
697-706
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Koichi KASHIMA
1985 Volume 51 Issue 463 Pages
707-713
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Hideya ANZAI, Tetsuo SHOJI, Hideaki TAKAHASHI, Hajime NAKAJIMA, Tatsuo ...
1985 Volume 51 Issue 463 Pages
714-722
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Kazuhiro DATE, Heihachi SHIMADA, Toshiyuki HIROSE, Mitsuo OBATA
1985 Volume 51 Issue 463 Pages
723-731
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Sotoaki KIDA, Juhachi ODA
1985 Volume 51 Issue 463 Pages
732-738
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Toshio JINGU, Kikuo NEZU
1985 Volume 51 Issue 463 Pages
739-749
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Katsuhiko MURASE, Shinichi ISHIYAMA, Hiroaki KATORI, Tohru NISHIMURA
1985 Volume 51 Issue 463 Pages
750-756
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Hozumi KAGAWA
1985 Volume 51 Issue 463 Pages
757-765
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
-
Hironobu NISHITANI, Ryoichi IMAI
1985 Volume 51 Issue 463 Pages
766-774
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
Rotating bending fatigue tests were made on the specimens which were polished longitudinally or circumferentially by two kinds of silicon carbide papers and then electro-polished. The fatigue processes were observed successively by the tow stage plastic replica method, with special attention being given to the starting points of final fracture. The materials used are a normalized S 45 C steel, and a quenched and tempered S 45 C steel. The main results obtained are as follows. (1 Non-propagating micro-cracks are observed on the surfaces of specimens after 10
7 cycles of fatigue limit. 2) The characteristics of the change in surface states due to stress repetitions can be explained based on the notch sensitivity of the material and the roughness of the specimen surface.
View full abstract
-
Hironobu NISHITANI, Nao-aki NODA
1985 Volume 51 Issue 463 Pages
775-783
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
The body force method is applied to calculate stress concentration factors of partially-circular circumferential notched cylindrical specimens subjected to torsion, tension of bending. This type specimen is used frequently for fatigue tests. The stress field induced by a ring force in an infinite body is used to solve these problems. The fundamental solutions and calculation method developed here have a wide applicability for various kinds of axisymmetric notch problems under torsion, tension or bending. Through the comparison of the present result with Neuber's analytical solution for a deep hyperbolic notch, the Neuber's solution is found to give a sufficient accuracy for a blunt notch in engineering use.
View full abstract
-
Hironobu NISHITANI, Masahiro ENDO
1985 Volume 51 Issue 463 Pages
784-789
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
According to the concept of "linear notch mechanics" proposed recently by one of authers, it is supposed that not only the crack initiation limit σ
w1 but also the crack propagation limit σ
w2 of a notched specimen can be evaluated unifyingly by the maximum elastic stress at the notch root σ
max and the notch radius ρ alone. Some previous results concerning σ
w2 and the present experimental results concerning σ
w1 and σ
w2 support the above presumption.
View full abstract
-
Kenji HATANAKA, Tatsuro FUJIMITSU, Hideaki WATANABE
1985 Volume 51 Issue 463 Pages
790-798
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
The smooth specimen of JIS S35C and SNCM 439 steels, which were heat-treated in several conditions, were low-cycle fatigued. Then, the growth rate of surface small crack, da/dN, was analyzed in terms of the cyclic J-integral range, ΔJ, and the strain intensity factor range, ΔK
ε. The crack growth rates plotted against ΔJ and ΔK
ε are approximately expressed by linear lines on a log-log diagram. The considerable scatter inherent in problems of a small crack, however, almost cover the small difference in the crack growth property among materials. As a result, the universal equations can be established for da/dN vs. ΔJ and da/dN vs. ΔK
ε relations, independently of kinds of materials used. The equations derived from combining the above two relations with the cyclic stress-strain curve describe well the fatigue life curve which bends downwards in the regime of the lower plastic strain range in materials of a high strength and low ductility as well as usual Coffin-Manson plots.
View full abstract
-
Hideo KOBAYSHI, Keyung-Dong PARK, Hirokazu TSUJI, Hiroshi KANAZAWA, Ha ...
1985 Volume 51 Issue 463 Pages
799-805
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
Near-threshold fatigue crack growth characteristics and crack closure in an A 508-3 steel were investigated at elevated temperatures (80°C, 100°C, 150°C, 288°C and 350°C). The results obtained are summarized as follows : (1) The threshold stress intensity factor range decreases with increasing the temperature upto 100°C and it increases afterward. (2) The occurrence of oxidation of crack surfaces has an important role on the near-threshold characteristics. The thin oxidation prevents the thick oxidation induces crack closure at the elevated temperatures (288°C and 350°C). (3) It can not be possible to detect exactly oxide induced crack closure by the back-face-strain unloading-compliance method.
View full abstract
-
Masahiro JONO, Jiho SONG, Masayoshi OHGAKI
1985 Volume 51 Issue 463 Pages
806-813
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
For S35C medium carbon steel and A5083-O aluminum alloy, fatigue crack growth tests were carried out in vacuum and in air under ΔK-increasing-decreasing condition, and crack growth rates and crack closure behavior were investigated in detail. In addition, ΔK constant tests were performed in air-to-vacuum-to-air environment. Fractographical study indicates that the material ahead of the crack tip deforms more easily in vacuum than in air. The crack opening point K
op under ΔK-increasing condition was lower in vacuum than in air within the limit of present experiments, and K
op under ΔK-decreasing condition was found to increase with the decrease of ΔK. Fatigue crack growth resistance of material was increased in vacuum and the degree of increase was found dependent on material and crack growth rate regime. The variable environment test results show that fatigue crack growth resistance is hardly affected by environment history.
View full abstract
-
Yukitaka MURAKAMI, Yukihiko UCHIYAMA, Tsutomu HAYAMIZU, Shoji HARADA
1985 Volume 51 Issue 463 Pages
814-823
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
Effect of disturbance due to material inhomogeneity and that of anisotropy on the path of crack propagation in brittle material are analyzed by the body force method. Disturbance is characterized by two factors, i.e. one is the magnitude and the other is the density of disturbance in materials. When a straight crack on x-axis propagates in a plate under biaxial tension (σ
x∞, σ
y∞), the path of crack propagation is influenced by both the ratio of σ
x∞ to σ
y∞ and the disturbance. When σ
x∞/σ
y∞≥10, the total path of crack propagation is almost entirely determined by the magnitude of disturbance at the start of propagation. When σ
x∞/σ
y∞<cong>5, the intermediate phenomena between σ
x∞/σ
y∞=2 and 10 occur. Even the weak anisotropy of K
IC remarkably influences the path of crack propagation. The experimentally obtained path of fracture of a circumferential surface crack in a pressurized acrylic cylinder can be explained only by considering the anisotropy of K
IC.
View full abstract
-
Shigeru AOKI, Kikuo KISHIMOTO, Atsushi KIMURA, Masaru SAKATA
1985 Volume 51 Issue 463 Pages
824-830
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
A finite deformation analysis of crack tip fields in a plane strain center cracked panel specimen is performed by taking the nucleation and growth of microvoids into consideration. It is shown that, even when the stress distribution deviates from the HRR singular field and the J-based characterization of crack tip region is not ensured, there exists a stress strain field characteristic of a blunted crack in the immediate vicintity of crack tip. This result suggests that the J-integral with an appropriate integrating path can characterize the stress strain field near a blunted crack tip and can be a fracture mechanics parameter in very large scale yielding.
View full abstract
-
Yoshihiko URATE, Aritoshi TATEMICHI
1985 Volume 51 Issue 463 Pages
831-837
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
This paper deals with the theory of obtaining the solutions of the elastostatics from the wave modes and their applications. A harmonic wave in an elastic strip consists of the P and the S waves. If the frequency of the wave becomes zero, these two components of the wave fall into linear dependence on each other. But, when the frequency tends to zero, the limit function of a linear combination of the P and the S components which are divided by square of the frequency satisfies the static equation. This is independent from the other solution which is the P component at zero-frequency. There are innumerable pairs of such solutions. The general solution for rectangular plates may be constituted as the series of these solutions with unknown coefficients which should be determined from the boundary conditions.
View full abstract
-
Hideyuki OTAKI, Yoshio ISHIKAWA
1985 Volume 51 Issue 463 Pages
838-845
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
The stress distribution of anisotropic mediums is hardly analyzed because of the difficulties of deriving out the stress function. Therefore, this report deals with the easy method to derive out the stress function of anisotropic mediums by using the stress function of isotropic mediums. By this method, the stress distribution at thread root of anisotropic screw thread due to a concentrated load applied at its flank is analyzed.
View full abstract
-
Hisao HASEGAWA, Satoshi TOKOYODA
1985 Volume 51 Issue 463 Pages
846-851
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
The problem of torsion of a conical-form rigid cylinder embedded in an elastic half space has been investigated in a previous paper. The problem may be said an analytical model of stress analysis in drilling. The principal object of this paper is an extension of the problem of a half space to one of an infinite thick plate. The method of solution used here is to distribute torsional body forces in a thick plate so as to satisfy the boundary conditions of a conical hole of an elastic thick infinite plate. For this purpose, we apply Green's functions for torsional body force problems of an elastic thick infinite plate. Stresses and displacements of the thick plate with a conical hole and torques necessary to twist the conical-form rigid cylinder are shown and compared with the results for an elastic half space.
View full abstract
-
Teiichi OOKOUCHI, Yasushi FUKUTOMI, Minoru TORII, Hiroshi SAKAI, Makot ...
1985 Volume 51 Issue 463 Pages
852-859
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
The minimal weight problems of cylindrical structures are discussed under constraints of the radial deflections or equivalent stresses in the pre-appointed points. Shape transformation processes in minimizing the sum of the squares on the same kinds of the parameters of constraints, in averaging the constraints parameters and in minimizing weights under decreasing the constraints are introduced to optimize the structures. The computed optimal cylindrical structures having the uniform radial displacements or equivalent stresses at the inner central areas are shown by the figures of the meridian sections of the structures. The shown diagrams of the distributions of the displacements and stresses indicate the optimalities.
View full abstract
-
Megumu SUZUKI, Hiroshi KANANISHI, Masaharu IWAMOTO
1985 Volume 51 Issue 463 Pages
860-865
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
The relationship between J-integral and crack tip opening displacement of composite materials is studied. The plastic constraint factor and the plastic flow stress are discussed macroscopically. It is found that when the kind of matrix resin and the void content are same and the fiber content is changed, J
* is proportional to CTOD
* on FRPC, RIM and R-RIM materials. It is concluded that the plastic constrain factors of FRPC are from 1.4 to 1.3, when the plastic flow stress is a stress at elastic limit, and the factors of RIM and R-RIM polyurethane are from 1.5 to 1.4, when the flow stress is one half of the sum of a stress at elastic limit and the tensile strength.
View full abstract
-
Masanori KIKUCHI, Hiroshi MIYAMOTO, Satoshi SUGAWARA, Takenori SHINDO
1985 Volume 51 Issue 463 Pages
866-872
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
The J integral evaluation is carried out for the surface cracks of a pressure vessel under thermal transient loadings. First the semi-elliptical surface crack existing on the inner surface of the vessel shell is treated and the effect of the aspect ratio of the crack on the J integral distribution along the crack front is studied. It is shown that the J integral value becomes nearly equal for a shallow crack by considering the thermal loading. Then the effect of the cladding is studied by analyzing the surface crack existing on the nozzle surface through the phase boundary between the base metal and the cladding. The results show that the J value becomes smaller by assuming the existance of the cladding than those neglecting it.
View full abstract
-
Katsuhiko WATANABE
1985 Volume 51 Issue 463 Pages
873-882
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
The crack energy density was proposed by the author as one of the most important crack parameter, of which the physical meaning is clear throughout the life of a crack. In this paper, this crack energy density is applied to the subject of fatigue crack growth and it is tried to establish it as the parameter which is available from the first to the last of the life of fatigue crack. The results are as follows : (1) The role of crack energy density as a crack parameter is made clear. (2) The relationship between the range of crack energy density, Δε and the load-displacement curves of specimens is obtained and it is shown that Δε becomes and available fatigue crack parameter throughout the life. (3) It is shown that the growth rate of fatigue crack is determined y the increment of crack energy density per one cycle, Δε
cyclet and the gradient of the distribution of crack energy density.
View full abstract
-
Yukitaka MURAKAMI, Takanobu TAHIRA
1985 Volume 51 Issue 463 Pages
883-890
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
The singularity of strain field at crack tip is analyzed by finite element method. The singularity deviates from HRR singularity to γ
-(0.5∼0.7) (γ: distance from crack tip) with increasing plastic deformation. The reasons why low-cycle fatigue law is expressed by Δε
PN
fα=C as pointed out by Coffin and Manson and why the exponent αranges from 0.5 to 0.7 for various materials are explained by considering that fatigue life is mostly occupied by the crack propagation process and that the singularity of strain field at crack tip under overall plastic deformation is γ
-(0.5∼0.7) regardless of materials. The material properties which influence the value of C in Δε
PN
fα=C are also discussed.
View full abstract
-
Yoshiharu MUTOH, Kohichi TANAKA
1985 Volume 51 Issue 463 Pages
891-897
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
Tensile tests and fracture toughness tests of high strength sintered steel have been carried out to investigate the effect of density on mechanical properties, fracture strain and fracture toughness J
IC. Young's modulus was measured in two ways including tensile test with extensometer and ultrasonic pulse time method. Experimental data for Young's modulus, 0.2% proof stress, tensile strength, elongation, true fracture strain and J
IC were presented simply in the form after Salak et al with narrow scatter. Theoretical predictions for Young's modulus, where it is assumed that the porosity is distributed as independent spherical holes in a homogeneous and isotropic matrix, gave higher values than the experimental data in the lower density region. The predictions of fracture strain and J
IC were successfully performed by using a void model with effective diameter d and spacing 1 and a fracture criterion of δ=λ
o (=1-d).
View full abstract
-
Toshihide IGARI, Katsuya SETOGUCHI, Shinichi NOMURA
1985 Volume 51 Issue 463 Pages
898-904
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
A study was made on the method of creep analysis of the perforated plate based on the equivalent solid plate concept. A series of creep analysis by FEM for various materials, ligament efficiencies and loading conditions was performed on the perforated plate with triangular penetration pattern of circular holes. Using the results of this analysis, prediction methods for both creep properties of the equivalent solid plate and local stress-strain concentration were examined. Obtained results are as follows. (1) A prediction method for creep properties of the equivalent solid plate was proposed, which is applicable to wider range of material compared with the conventional method. (2) A practical prediction method for the local stress-strain concentration was proposed, which is basically based on the Neuber's rule together with the Hoff's analogy.
View full abstract
-
Yoshihiko SUGIYAMA, Yasuyoshi TANAKA, Takeyasu KISHI, Haruo KAWAGOE
1985 Volume 51 Issue 463 Pages
905-911
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
This paper deals with the effect of an intermediate lateral spring support on the stability limit of a cantilevered viscoelastic tubular pipe conveying fluid. Comparisons were made between the theoretical predictions and the corresponding experimental results. It is shown that furnishing the pipe with a spring support does not necessarily lead to stabilizing function. The support at the tip end may be most destabilizing among others. Stabilizing effect due to a spring support is closely related to the transition of instability mechanism.
View full abstract
-
Shinobu YOSHIMURA, Genki YAGAWA, Naoki SONEDA
1985 Volume 51 Issue 463 Pages
912-918
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
This paper is concerned with the application of electromagnetic force to the determination of dynamic fracture toughness. We take an edge-cracked specimen which carries a transient current I and is simply supported in a uniform and steady magnetic field B. In fracture analysis, the extended J-integral with the effect of the electromagnetic force and the inertia force is calculated. Also the R-curve technique is utilized in upper shelf temperature ranges and the electric potential method below the transition ones in order to detect the crack initiation. Using these techniques, we evaluate the dynamic fracture toughness of A508 cl. 3 steel and discuss about the loading rate effect on fracture toughness.
View full abstract
-
Tomoaki TSUJI, Toshikazu SHIBUYA, Takashi KOIZUMI, Kazuo TAKAKUDA
1985 Volume 51 Issue 463 Pages
919-925
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
Torsion problems for two rods bonded each other by an adhesive layer are investigated. It is assumed in analyses that the mechanical behavior of the adhesive layer is approximated by that of shear springs, and hence the shear stress τ
θz in the adhesive layer can be proportional to the difference of the displacements υ
θ between the upper and the lower surface of the adhesive layer. Making use of the series expansion techniques, we reduce the problems to the infinite systems of linear equations which can be solved numerically. Then, the stress distributions are obtained for various values of mechanical properties of the rods and the adhesive layer. We also investigate the special case of these problems i. e. the torsion of a half space by an adhered rigid rod.
View full abstract
-
Yasuaki SUZUKI
1985 Volume 51 Issue 463 Pages
926-934
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
For the investigation of fracture criteria, adhesive tensile strengths of scarf and butt joints bonded by a brittle and two ductile epoxy adhesives have been measured and three-dimensional finite element analyses have been performed. Deformation of the joints influenced considerable by mechanical properties of adhesives. Fracture of the joints bonded by the brittle adhesive obeyed maximum principal stress criterion. In the scarf angles of 15° to 60°, fracture of the joints bonded by the ductile adhesives obeyed von Mises criterion and in the scarf angles more than 60°, brittle (cleavage) fracture occured for those joints by plastic constraint due to increase of stress triaxiallity in adhesive layers. Locations of fracture initiation and fracture modes of adhesive layers observed with an optical microscope and a a scanning electron microscope agreed with those expected from experimental results of deformation and adhesive tensile strength, and results of stress analyses.
View full abstract
-
Masachika NAITOH, Masashi DAIMARUYA, Kaishin LIU
1985 Volume 51 Issue 463 Pages
935-941
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
In the present paper the elastic-plastic stress of the impact end of a cylindrical specimen subjected to longitudinal compression impact with a stress bar which remains elastic during the test is investigated experimentally and theoretically. The measured elastic response of the stress bar showed explicitly the elevation of dynamic stress and its relaxation at the impact end of the specimen. The impact end stress of specimen was analyzed by using of the strain-rate dependent theory for plastic wave propagation, taking into account a rise time of impact and impact conditions. The extreme elevation of the dynamic stress was predicted in the case of a step impact, but it went down rapidly with the increasing of the rise time of an impact velocity. Taking these stresses as an incident pulse to the stress bar, the elastic response of the stress bar based on the Love theory for elastic waves almost agreed quantitatively with the experimental results as well as qualitatively.
View full abstract
-
Toshio JINGU, Kikuo NEZU
1985 Volume 51 Issue 463 Pages
942-951
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
The purpose of present investigation is to analyze the stress waves propagating due to suddenly applied normal loads at the end points of diameter of spherical cavity embedded in an infinite, linear, homogeneous, isotropic, elastic medium. The solution for Laplace transformed wave equations is given by meridional Legendre function and radial spherical Hankel function. The unknown functions included in such solutions, are determined by the boundary conditions for loads represented by the form of series of Legendre function. Formal solution obtained by the evaluation of residue, gives the dynamic response due to the arrival of stress waves.
View full abstract
-
Yoichi OBATAYA, Shinobu KOHNO
1985 Volume 51 Issue 463 Pages
952-960
Published: March 25, 1985
Released on J-STAGE: February 21, 2008
JOURNAL
FREE ACCESS
A rate-independent cyclic plasticity model is presented with the concept of the field of resisting force against the movement of dislocations. A stress-strain behaviors in each half cycle is expressed by only three internal state variables concerned with such field and microscopic structures. The various cyclic deformation phenomena after the steady state can be predicted by these three variables which are described by the maximum stress and strain ranges of the past and the stress and strain prehistory. This prediction is confirmed by the experimental results of carbon steel and brass which differ in microscopic structure.
View full abstract
