Fatigue life prediction and experiment research for composite laminates with circular hole^①

来源期刊：中南大学学报(英文版)2004年第1期

论文作者：齐红宇 温东 孙联文

文章页码：19 - 22

Key words：composite material; fatigue; Whitney-Nuismer criterion; laminate with a hole

Abstract: Based on the fatigue prediction model of exponential function and Whitney-Nuismer(WN) criterion of static strength for the composite material laminate with a circular hole, the stress correct factor (β) was put forward and a new fatigue prediction model for composite material laminate was set up. T300/KH304, which is recently studied and is a high capability composite material, was used as the raw material. In order to gain the factorβ, the fatigue experiments of the laminates with holes in different diameters and the same ratio of width to diameter were conducted. The fatigue analysis and tests of the laminates with a hole 5 mm in diameter are carried out at different stress levels, and the results meet the engineering requirement. The simple, prompt and practical method is provided for the prediction of S-N curve of compos-ite laminate with a circular hole.