Study on the Stress distribution and fracture location of dumb-bell specimens of brittle materials

doi:10.19491/j.issn.1001-9278.2009.02.020

China Plastics ›› 2009, Vol. 23 ›› Issue (02): 88-92 .DOI: 10.19491/j.issn.1001-9278.2009.02.020

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Study on the Stress distribution and fracture location of dumb-bell specimens of brittle materials

DENG Ke, BU Hai-tao,HONG Jian-cheng,LIU Xian-feng,WU Shi-jian

1. Computer Science Staff Room, Chongqing Medical University, Chongqing 400016, China; 2.College of Polymer Science and Engineering, Sichuan University, Chengdu 610065,China

Received:2008-10-27 Revised:1900-01-01 Online:2009-02-26 Published:2009-02-26

Abstract

Abstract: The stress distribution, stress concentration position and stress concentration factor of the dumb-bell specimens during tensile testing were simulated with ANSYS. It showed that there was obvious region of stress concentration distributed at the circular arc, with a factor of 1.123.PS specimens were prepared by compression and injection molding. The tensile fracture process and fracture region of specimens were found agree with the simulate-analytical results. The compression molded dumb-bell specimens were homogeneous and isotropic, and fracture occurred on the circular arc transition, on which the stress concentration factor was the maximal. The injection molding dumb-bell specimens fractured on the straight portion far from the gate on which the thickness of the skin layer and the shearing layer were thin. And the influence of stress concentration was weak.

Key words: dumb-bell specimens, PS, ANSYS analysis, stress concentration, skin-core structure

DENG Ke, BU Hai-tao, HONG Jian-cheng, LIU Xian-feng, WU Shi-jian . Study on the Stress distribution and fracture location of dumb-bell specimens of brittle materials[J]. China Plastics, 2009, 23(02): 88-92 .

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Study on the Stress distribution and fracture location of dumb-bell specimens of brittle materials

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