航空材料学报2011，Vol.31Issue(4)：86-89,4.DOI:10.3969/j.issn.1005-5053.2011.4.016
有机玻璃裂纹扩展双参量驱动力模型
Model of Two-parameter Driving Force for Fatigue Crack Growth of PMMA
摘要
Abstract
The fatigue crack propagation rate of YB-DM-11 PMMA in intermediate and accelerated regions was measured with the R-ra-tio of -0.4,0.1, and 0.4. The two-parameter driving force model, K' =(Kmax)α(ΔK+ )1-α, which apply to metal materials, was introduced to describe the crack propagation behavior of PMMA. For PMMA, the parameter a is not a fixed value but a function is related to stress ratio, fracture toughness, stress intensity factor and a, , which is calculated while the crack propagation rate is tending to infinity. To R = -0. 4-0. 4, the common crack propagation rate equation based on the two-parameter driving force model was obtained, and was used to explain the fatigue crack propagation behavior under different stress ratios, and predicted the fatigue crack propagation rate of PMMA in intermediate and accelerated regions was effected by the stress ratios.关键词
裂纹扩展驱动力/应力比/裂纹扩展速率/应力场强度因子/有机玻璃Key words
crack driving force/ stress ratio/ crack propagation growth/ stress intensity factor/ PMMA引用本文复制引用
宋全超,张建国,乙晓伟,王泓..有机玻璃裂纹扩展双参量驱动力模型[J].航空材料学报,2011,31(4):86-89,4.
