计及湿热效应的层板复合材料疲劳寿命的试验及数据处理方法

湿热环境严重影响复合材料的物理及力学性能 ,为研究湿热效应对疲劳寿命的影响 ,建立考虑湿热影响的复合材料疲劳性能试验方法。文中以剩余强度衰减模型为基础 ,对考虑湿热效应的层板复合材料的拉—拉疲劳性能试验的全过程进行介绍 ,阐述试件准备过程、试验中测试的项目 ,详细介绍基于剩余强度衰减模型中的参数的确定以及试验中试件个数确定的计算方法 ,并且指出试验中一些必要的注意事项 ,对试验中的有关数据处理也给出相应的理论基础。以此试验方法为基础可以方便地进行疲劳寿命的预测与分析

EXPERIMENTAL AND DATA PROCESSING METHOD FOR FATIGUE LIFE OF COMPOSITE LAMINATES UNDER HYDROTHERMAL CONDITION

Humidity and temperature greatly affect the physical and mechanical performances of composite materials. For studying hydrothermal effects on composite material fatigue life,establishes an experimental method of fatigue properties under the hydrothermal condition are estabished. This method, based on the model of residual strength degradation, introduces the whole process of tensile-tensile fatigue tests in detail in certain hydrothermal condition, and expatiates how to prepare the specimens, the testing contents of experimentation. In addition, author brings up a method of ascertaining unknown parameters in the model and the quantity of specimens in the test. Announcements in the experiment are mentioned at the same time. Theoretical basis of data processing in the tests were indicated. On the bases of this experimental method, the prediction and analysis of fatigue life can be convenience.