FRACTURE BEHAVIOR OF ACRYLONITRILE-BUTADIENE-STYRENE RESIN
Abstract
In this research, mixed mode loading testing of actylonitrile-butadiene-styrene (ABS) resin was carried out by using a compact tension shear specimen which was attached to a special loading device. The angle between the loading axis and the crack surface was varied from 90o (Mode I) to 0 (Mode I1). Two types of ABS resin were examined. The first one (ABS-I) has a butadiene rubber content of 18 wt % in the form of small particles of diameter about 200 nm. The second one (ABS-2) has the same overall butadiene rubber content but a bimodal particle distribution with diameters of 200 nm and 500 nm. Crack initiation and propagation was observed by using a video microscope. The results show that the fracture angle for both materials under mixed mode loading coincides with the values predicted by the maximum hoop stress criterion. To obtain the stress intensity zctors, numerical analyses of compact-tension-shear specimen were conducted using a two dimensional finite element analysis. Fracture behavior of ABS resins under mixed mode loading was almost the same as that under mode I loading for lower value of mode 11 component. However, for higher mode II component, shear type fracture occurred at initial crack tip.
References
A.J., Kinloch, and R.J., Young, Fracture behavior of Polymer, Applied science publishers, London, (1983).
C. K., Riew, and A. J., Kinloch, ed., Toughened Plastics II: Novel Approaches in Science and Engineering, Advances in Chemistry Series 252, Washington, DC. (1996).
A. M., Donald, and E. J., Kramer, Plastic Deformation Mechanism in poly(acrylonitrile-butadiene styrene) [ABS], J. Mater. Sci., 17, 1765-1772, (1982).
B. Y., Ni, T. Y., Zhang, and J. C. M., Li, A New Approach to Fracture Toughness Analysis and Its Application to ABS polymers, J. Mater. Res., 6, 6, 1369-1373, (1991).
Wu, J. S., Shen, S. C., and Chang, F., C., Effect of Rubber Content in Acrylonotrile-Butadiene-Styrene and Additional Rubber on The Polymer Blends of Polycarbonate and Acrylonitrile-Butadiene-Styrene, Polymer Journal, 26, 1, 33-42, (1994).
D.D., Huang, In Toughened Plastics I: Science and Engineering, Riew, C. K, and Kinloch, A. J., Ed; Advances in Chemistry Series 233; American Chemical Society, Washington, DC, 1993.
M. L., Lu, C. B., Lee, and F. C., Chang, Fracture Toughness of polycarbonate! acry1onitrile-butadiene-styrene blend by the ASTM E813 and hysteresis energy J integral methods: effect of specimen thickness and side groove, Poly. Eng. and Science, 35, 18, 1433-1439, (1995).
F. Erdogan, and G. C. Sih, On the Crack Extension in Plates Under Plane Loading and Transverse Shear, J. Basic Eng., 85, 519-527, (1963).
J. G. Williams, and P. D. Ewing, Fracture Under Complex Stress - The Angle crack Problem, Int. J Fracture Mech.,8, 4, 441-446, (1972).
I. Finnie, and A. Saith, A Note on The Angled Crack Problem and The Directional Stability of Cracks, Int. J. Fract, 9, 484-486, (1973).
H. A. Richard, Crack Problems Under Complex Loading, Int. Conf. on Role of Fracture Mechanics in Modem Technology, Sih, G. C., Nisitani, H., and Ishihara, T, Ed, Fukuoka, Japan, 577-588, (1986).
A. Otsuka, K. Tohgo, and Y. Okamoto, Relationship Between Ductile Crack Initiation and Void Volume Fraction, Nuc. Eng. Design, 105, 121-129, (1987).
S. Aoki, K. Kishimoto, T. Yoshida, M. Sakata, and H A. Richard, Elastic-Plastic Fracture Behavior of An Aluminum Alloy under Mixed Mode loading, J. Mech. Phys. Solids, 38, 2, 195-213, (1990).
T. Kuriyama, and 1. Narisawa, Fracture Behavior of Ductile Polymer Under Mixed Mode Loading, Proc. Annual Technical Cor,rence-ANTEC. Soc. of Plastics Engineer, USA, Brookfield, .3235-3239, (1994).
