All issues
Volume 3 (1977)
- Issue 4 Pages 127-
- Issue 3 Pages 85-
- Issue 2 Pages 45-
- Issue 1 Pages 1-
Volume 3, Issue 4
Displaying 1-9 of 9 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]1977 Volume 3 Issue 4 Pages 127-132
Published: October 31, 1977
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSDownload PDF (1926K) -
Relation between the Mechanical Properties and Mixing TimeY. HASEGAWA, S. HANASAKI, J. FUJIWARA1977 Volume 3 Issue 4 Pages 133-140
Published: October 31, 1977
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSInjection molding of BMC (Bulk Molding Compound) has more advantages than other molding process. However, the molded parts have the poor mechanical strength, which is the serious defect. This is caused mainly by the fiber breakage in process of mixing and injection of BMC. Therefore, in order to clarify the phenomenon in mixing and to study the influence of mixing operation on the properties of parts, the properties of both injection molding parts and compression molding parts produced with the BMC of various mixing time are examined. Moreover, the situation of the breakage of the glass fiber in BMC is observed. The main results are as follows : 1) There is little difference between the strength of molded parts composed of 3 mm chopped strand and that composed of 13 mm chopped strand. 2) Both the tensile strength and the flexural strength of injection molding parts of BMC increase to the same degree as the compression molding parts with increase of mixing time. 3) This results from both the improvement of interfacial bonding between glass fiber and matrix and the homogenizing of BMC due to the good dispersion of glass fiber into matrix.View full abstractDownload PDF (6818K) -
Part II. Transverse LoadsT. ISHIKAWA, S. KOBAYASHI1977 Volume 3 Issue 4 Pages 141-148
Published: October 31, 1977
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSThe semi-microscopic stress state in the unidirectional fiber-reinforced composites subjected to the transverse normal loading, σξ, is calculated by the method which has often been employed in the authors' investigations. A new problem to be considered is the case where the transverse shear load, τxy, applies. Because this is solved with Fourier sine series, the stress state under the σξ in an arbitrary direction in the transverse plane can be calculated. Some conclusions similar to the case of the longitudinal shear loading are obtained, e.g., geometrical parameters are more important factors than material parameters. Some different and more complicated trends of stress concentration factors under the σξ are also described in detail. Typical one of these trends is that maximum values of stress concentration factors do not always occur at the fiber-matrix interface.View full abstractDownload PDF (1668K) -
T. AKASAKA, K. KABE, H. TOGAWA1977 Volume 3 Issue 4 Pages 149-154
Published: October 31, 1977
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSCross-section shape of radial tire can be generally determined by the equilibrium conditions for the in-extensible radial cords under the inflation pressure at the sidewall and a reduced inflation pressure due to the contact pressure transmitted from the breaker belt at the tread. Explicit expressions of integral form for the cross-section shape were previously obtained by several authors in accordance with the assumed contact pressure distribution of parabolic or uniform shape at the tread. In this paper, the cross-section shape and the cord length of radial tire for two cases of a uniform contact pressure distribution and a constant tread radius were found to be expressed by elliptic integrals in a pair of two separate forms. Good agreement between the calculated cross-section shapes of radial tire and measured ones was obtained.View full abstractDownload PDF (482K) -
S. YAMASHITA, T. NISHIMURA1977 Volume 3 Issue 4 Pages 155-158
Published: October 31, 1977
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSThe reinforcement effects of asphalt-pavement with various types of synthetic woven fabrics, nets, chopped fibers and beads were studied. The experimental data indicated that such properties of asphalt compound as bending strength, compressive strength, and deformation under impact load can be improved. On the basis of experimental results, polyester fabrics and nylon nets were tested on actual asphalt-pavement construction. At the actual field test, a load-spreading effect with synthetic woven fabrics and nets were found especially on the ground which can be deformed by heavy traffic load or on the soft ground. The reinforcement of asphalt pavement is, however, at the experimental stage yet and the further studies on the practical effects and economical advantages will be necessitated.View full abstractDownload PDF (2678K) -
Y. UEDA, S. KUNIMITSU1977 Volume 3 Issue 4 Pages 159-162
Published: October 31, 1977
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSThe creep property ofPb-Al3O3 composites, which were containing 3.2N7.4 vol% of 1μm-Al3O3 and fabricated by the mechanical alloying process, was estimated by the activation energy for creep corrected with the temperature dependence of Young's modulus. The corrected activation energy for creep increases with the increasing Al3O3 volume fraction. The contribution of Al3O3 to creep resistance is evaluated up to elevated temperature quantitatively.View full abstractDownload PDF (331K) -
[in Japanese]1977 Volume 3 Issue 4 Pages 163-165
Published: October 31, 1977
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSDownload PDF (3199K) -
[in Japanese]1977 Volume 3 Issue 4 Pages 166
Published: October 31, 1977
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSDownload PDF (148K) -
1977 Volume 3 Issue 4 Pages 167-170
Published: October 31, 1977
Released on J-STAGE: February 08, 2010
JOURNAL FREE ACCESSDownload PDF (565K)
- |<
- <
- 1
- >
- >|