MATRIX DAMAGE IN A CFRP COMPOSITE UNDER CYCLIC LOADING

机译：循环荷载下CFRP复合材料的基体损伤

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A series of cyclic tests were conducted on unidirectional HTA/6376 composite specimens to isolate and describe matrix degradation due to fatigue. Specimens were loaded at 45°to the fibre axis and cycled to failure, using a stress ratio R (minimum/maximum stress) of 0.1. Damage was monitored by measuring changes in the mechanical properties using a series of strain gauge rosettes in the loading and transverse directions, as well as perpendicular to the fibres. Stress-strain curves were plotted for the loading, longitudinal, transverse and shear directions. Ratchetting of the hysteresis loops indicated that cyclic creep in the matrix was dominant. A parameter based on cyclic creep allowed damage evolution to be described throughout life for all stress levels.

机译：对单向HTA / 6376复合材料样品进行了一系列循环测试，以分离和描述由于疲劳引起的基体降解。将样品以45°的角度加载到纤维轴上，并使用0.1的应力比R（最小/最大应力）循环破坏。通过使用一系列应变计玫瑰花结，在加载方向和横向以及垂直于纤维的方向上，测量机械性能的变化，监测损伤。绘制了载荷，纵向，横向和剪切方向的应力-应变曲线。磁滞回线的响动表明矩阵中的循环蠕变是主要的。基于循环蠕变的参数允许在整个生命周期内描述所有应力水平下的损伤演化。

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来源
《Eighth International Fatigue Congress Vol.5, Jun 3-7, 2002, Stockholm, Sweden》|2002年|p.3285-3291|共7页
会议地点 Stockholm(SE);Stockholm(SE)
作者
Alan Plumtree; Larissa Sorensen;
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Department of Mechanical Engineering, University of Waterloo, Waterloo, ON, Canada, N2L 3G1;

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原文格式 PDF
正文语种 eng
中图分类一般工业技术;
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MATRIX DAMAGE IN A CFRP COMPOSITE UNDER CYCLIC LOADING

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