標題: PRECRACK HYSTERESIS ENERGY IN DETERMINING ITS DUCTILE-BRITTLE TRANSITION .3. EFFECT OF TEMPERATURE
作者: CHANG, FC
HSU, HC
交大名義發表
應用化學系
National Chiao Tung University
Department of Applied Chemistry
公開日期: 27-六月-1994
摘要: A temperature variable has been used to correlate the precrack hysteresis energy and the corresponding ductility in terms of ductile-brittle transition behavior for polycarbonate. When the precrack plastic zone exceeds a critical value, crack extension thereafter will be effectively contained within the domain of the plastic zone and result in ductile fracture. Whether a specimen will fail in a ductile mode or a brittle mode is actually already being decided before the onset of crack initiation. The precrack elastic storage energy, total input energy minus hysteresis energy, is the major driving force to strain the crack tip for crack initiation. A higher testing temperature with lower yield stress converts a greater fraction of the input energy into the precrack hysteresis energy and relieves the storage strain energy available for crack initiation. A polycarbonate-toughening mechanism of increasing temperature is very similar to the presence of rubber by reducing yield stress and increasing the precrack plasticity. (C) 1994 John Wiley & Sons, Inc.
URI: http://dx.doi.org/10.1002/app.1994.070521306
http://hdl.handle.net/11536/2449
ISSN: 0021-8995
DOI: 10.1002/app.1994.070521306
期刊: JOURNAL OF APPLIED POLYMER SCIENCE
Volume: 52
Issue: 13
起始頁: 1891
結束頁: 1904
顯示於類別:期刊論文


文件中的檔案:

  1. A1994NN76000006.pdf