Transactions of the Japan Society of Mechanical Engineers Series A

Online ISSN : 1884-8338
Print ISSN : 0387-5008

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Volume 51, Issue 469

Displaying 1-25 of 25 articles from this issue

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Relative Notch Opening Displacement Concept for Crack Initiation in High Temperature Time Dependent Fracture of Stainless Steel

Toshimitsu YOKOBORI, Takeo YOKOBORI, Takashi KURIYAMA, Takuzo KAKO

1985 Volume 51 Issue 469 Pages 2049-2056
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2049

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The effect of biaxial stresses on fatigue crack growth and the factors influencing it

Ryoji YUUKI, Hideo KITAGAWA, Keiichiro TOHGO, Masato TANABE

1985 Volume 51 Issue 469 Pages 2057-2066
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2057

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Elastic-Plastic Fatigue Crack Propagation from Notches

Kiyotsugu OHJI, Yoshikazu NAKAI, Toshiyuki OCHI, Masaru MURA

1985 Volume 51 Issue 469 Pages 2067-2075
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2067

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Data Pooling Analysis for Fatigue Data

Hidetoshi NAKAYASU, Tadashi UMEHARA

1985 Volume 51 Issue 469 Pages 2076-2084
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2076

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Influence of Inorganic Coating on Protection from Tufftriding : 1st Report, On the Mechanical Properties and Fatigue Strength of Anti-tufftrided Steel

Chuji KAGAYA, Noburo EGAMI, Masanori KATO, Shizuo ISHIZUKA, Kinichi ON ...

1985 Volume 51 Issue 469 Pages 2085-2093
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2085

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Orthotropic Rectangular Plates with an Eccentric Crack and an Inclined Crack in Steady State Temperature Fields

Hiroshi NAKANISHI, Shuichi TANI, Megumu SUZUKI, Naobumi SUMI

1985 Volume 51 Issue 469 Pages 2094-2102
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2094

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Dynamic Stress Analysis of Rotating Hollow Discs

Shigeyasu AMADA

1985 Volume 51 Issue 469 Pages 2103-2111
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2103

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Torsion of an Elastic Finite Solid Cylinder with a Semicircular Groove : Influences of Boundary Conditions on the Stress Concentrations

Hisao HASEGAWA, Satoshi TOKOYODA

1985 Volume 51 Issue 469 Pages 2112-2119
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2112

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Plastic Strain Localization Developing from Free Surface

Hiroshi KITAGAWA, Hisashi MATSUSHITA

1985 Volume 51 Issue 469 Pages 2120-2128
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2120

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Mixed-Mode Elastic-Plastic Fracture of 2024-T351 Aluminum Alloy

Masaru SAKATA, Shigeru AOKI, Kikuo KISHIMOTO, Masakazu TOKIZAWA, Hiros ...

1985 Volume 51 Issue 469 Pages 2129-2136
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2129

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Time-dependent and Cycle-dependent Crack Propagations of SUS 304 Stainless Steel at Creep Temperature (650°C) Under Sinusoidal Fatigue Stresses of Non-negative Stress of Non-negative Stress Ratios

Kiyotsugu OHJI, Shiro KUBO, Won Sik JOO, Toshihumi KURI

1985 Volume 51 Issue 469 Pages 2137-2145
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2137

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Threshold for Fatigue Crack Propagation under Fatigue-Creep Conditions in SUS 304 Stainless Steel

Kiyotsugu OHJI, Shiro KUBO, Toshihumi KURI, Kenji MISHIZAKI

1985 Volume 51 Issue 469 Pages 2146-2153
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2146

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Proposal of New Crack Model Considering the Discontinuity in the Cracked Plane and Its Application to the Evaluation of Crack Parameter

Katsuhiko WATANABE, Hideyuki AZAGAMI

1985 Volume 51 Issue 469 Pages 2154-2161
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2154

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Dependence of Strain-Hardening under Multiazxial Non-Proportional Cyclic Plastic Deformation on Amplitude History of Plastic Strain

Eiichi TANAKA, Sumio MURAKAMI, Masahiro OOKA

1985 Volume 51 Issue 469 Pages 2162-2171
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2162

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Improvement of the Energy Method by Use of Finite Element Division and Its Application to Flat Rolling of Bar

Kazunori KATO, Tadao MUROTA, Kazutaka KOMORI

1985 Volume 51 Issue 469 Pages 2172-2180
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2172

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Analysis of Rolling of Bars by the Energy Method Using Finite Element Division

Kazutake KOMORI, Kazunori KATO, Tadao MUROTA

1985 Volume 51 Issue 469 Pages 2181-2189
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2181

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Mechanical Properties of a Low Carbon Steel Shock Loaded by an Explosive.

Masanobu OHMORI, Izumi FUKUDA, Masahiro FUJITA

1985 Volume 51 Issue 469 Pages 2190-2197
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2190

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The Fatigue Damage Process of FRP Laminates with U and V Type Notches

Seiichi ITSUTSUJI, Taichi FUJII, Zenichiro MAEKAWA

1985 Volume 51 Issue 469 Pages 2198-2202
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2198

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This paper deals with the fatigue damage process of glassfiber reinforced polyester laminates with U and V type notches. It is shown from experimental results that the relationship between the applied stress/tensile strength ratio and fatigue life is the same on the whole, regardless of fiber content. In order to explain these fatigue behaviors, a simple fatigue and residual strength degradation model is proposed to predict the fatigue life under pulsating tensile loadings. The prediction of fatigue life by a numerical approach using the proposed fatigue damage model agrees well with the experimental data.

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The Effect of the Pressure Medium on Cylinder Fatigue Strength under Repeated Internal Pressure : In the Case of Metallic Materials of Mild Steel, Stainless Steel, Manganese Steel, Aluminum Alloy and Copper

Mitsuo NAGAO, Munekazu KANNO

1985 Volume 51 Issue 469 Pages 2203-2208
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2203

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A thin cylinder of ductile materials was subjected to internal pressure by various media, and the fatigue strength of the materials was determined experimentally as the effect of different media. The metallic materials of the thin cylinder were mild steel, stainless steel, manganese steel, aluminium alloy and copper metal. Various kinds of actuating pressure media -water, 3 percent saltwater, turbine oil and castor oil- were used to test the cylinder. S-N curves for the pressure medium show inherent fatigue strength in combination of the medium and metallic materials. On the surface of the ferrous metal, marks peculiar to corrosion fatigue were observed in the inner cylinders. Free energy change given ΔG by Gibbs is adopted as a parameter of reactivity in the relation metal and environments of medium. The fatigue strength of thin cylinder for pressure medium is correlated to the free energy of metal.

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An Analysis of Large Deflections in a Four-Point Bending with Friction at All Supports

Atsumi OHTSUKI

1985 Volume 51 Issue 469 Pages 2209-2215
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2209

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In a symmetrical four-point bending with friction at both loading supports and reaction supports, the problem of nonlinear large deflections of a thin elastic simply supported beam is analysed by the numerical method (R-K-G method) and the analytical method using the Legendre-Jacobi form's elliptic integrals of the first and second kinds. Moreover, the conversion factors are proposed to estimate the maximum deflection, end slope, maximum bending stress in large flexural states with friction at loading and reaction supports from the conventional linear bending theory in place of the exact large deflection theory. The experimental results conform well to ones obtained by the presented large deflection theory.

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Plastic Strain Localization Developing from Free-Surface : 2nd Report, Formation and Development of Localized Shear Band

Hiroshi KITAGAWA, Hisashi MATSUSHITA

1985 Volume 51 Issue 469 Pages 2216-2223
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2216

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Localized shear band formation developing from stress free surface in a highly strained elastoplastic material under the uniaxial plane strain tension is studied taking effects of both geometrical and material factors into consideration. Analyses of bifurcation and shear band formation which appear in a rectangular region are carried out by a finite element method in regard to J2-deformation, single crystal and poly-crystalline material models. Numerical results show that existence of surface and inner mode bifurcation with short wave length seem to be important for shear band formation. From the results of the poly-crystalline material model, it is pointed out that shear band which gets through the region appers just after the maximum load state and the growth of diffused necking seems to be promoted by successive generation and development of the shear bands.

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The Secondary Forming Limit Diagrams of Sheet Metals

Manabu GOTOH, Takeshi SATOH, Kozo TANAKA

1985 Volume 51 Issue 469 Pages 2224-2230
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2224

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The forming limit diagrams of proportionally pre-strained metal sheets (secondary FLDs) such as killed steel, copper and aluminium sheets are experimentally determined for combination of uniaxial and equi-biaxial tension as well as the common FLDs for simple loadings. These FLDs are constitutive in good agreement even in a quantitative sense with the latters.

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Microstructure of Hypo-Eutectoid Steel in Laser Hardening Process

Etsuji OHMURA, Yoshiharu NAMBA

1985 Volume 51 Issue 469 Pages 2231-2238
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2231

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The heat-affected-zone microstructure was analyzed both theoretically on S45C carbon steel as an example of hypo-eutectoid steel irradiated with CO₂ laser beams. The affected zone was examined with the Nomarski microscope, SEM, EPMA and micro-hardness tester. The micro-hardness in the hardened layer varies remarkably, depending on carbon contents of the regions. The distribution of carbon contents is subject to the diffusion process of carbon atoms from the prior-pearlite colonies to ferrite phase after Ac₁ transformation. Final microstructure is formed below the Ms point in the rapid cooling period. Experimental results could be explained well with the theoretical thermal history at each part of hardened layers. Microstructural change can be estimated by theoretical analysis on hardening process as well as the shape and size of transverse cross-section of the hardened layers.

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The Pressure-Volume Relation of Left Ventricles During Isobaric Contractions

Hiroyuki ABE, IWO MIYANO, Toshio NAKAMURA

1985 Volume 51 Issue 469 Pages 2239-2242
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2239

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By extending the eigen stress model and Starling's law of the heart, a viscoelastic mechanical model was proposed for analysing the deformation of ejecting ventricles under constant ejection pressures. The model consisted of time-varying elements (i.e., elastic and contractile element) with a parallel viscous element. Based on this model, a differential equation (was obtained), which expressed the pressure-volume relation of left ventricles. It was found that the viscous coefficient had no dependency on the end-diastolic volume. Numerical results from experiments using 4 dogs showed that the viscous coefficient became a constant value independent of time during isobaric contractions. This model was able to predict the left ventricular volume during isobaric contractions.

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Stress in the Left Ventricular Wall During Isobaric Contractions and Biaxial Stress-Strain Relation of the Unit Cardiac Muscle Fiber

Hiroyuki ABE, Iwo MIYANO, Toshio NAKAMURA

1985 Volume 51 Issue 469 Pages 2243-2246
Published: September 25, 1985
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaia.51.2243

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Stress distribution in the left ventricular wall during isobaric contractions was determined analytically from the pressure-volume relationship based on the large deformation theory by assuming spherical geometry of the left ventricles. Numerical results from experiments using 4 dogs showed that the hoop strain decreased with time during isobaric contractions, while the hoop stress decreased at first, and then increased after the minimum value. A mechanical model of the unit cardiac muscle fiber was obtained. Based on this model, it was found that the biaxial stress-strain relation of the unit cardiac muscle fiber during isotonic contractions changed with the muscle length at rest, and it was expressed by different curves, depending on the muscle contractions.

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