FATIGUE CUT GROWTH OF THERMOPLASTIC POLYURETHANES

被引:6
|
作者
RODRIGUEZ, EL
BASAR, R
KOLYCHECK, EG
TSENG, HS
机构
[1] The BFGoodrich Company, Technical Center, Avon Lake, Ohio 44012
关键词
D O I
10.1177/073168449401300101
中图分类号
TB33 [复合材料];
学科分类号
摘要
A fatigue cut growth evaluation for thermoplastic polyurethanes is presented. The results from an experimental design study that included four different polyol types, the effect of the molecular weight of the polyol and three different urethane contents are discussed. The polycarbonate polyol showed the lowest fatigue cut growth resistance. The molecular weight of the TPUs is of key importance for dynamic fatigue applications. The crack length as a function of the number of cycles and the cut growth rate as a function of the tearing energy for selected TPUs are also shown. The fracture surface morphology of the failed samples showed two distinct morphologies, first, a flat featureless region with apparent fast cut growth and second, a rough wavelike region with apparent slow cut growth.
引用
收藏
页码:2 / 19
页数:18
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