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对不同温度下的耐高温树脂基复合材料T300/BMP350的0°和90°单向层合板进行静载拉伸实验,得到材料在不同温度下的应力-应变响应,分析了温度对材料的力学性能影响。通过高温应变片采集到材料在高温环境下的热输出和破坏时的极限应变,分析了材料的热行为。通过分析材料的应力-应变曲线和失效模式,研究了材料的损伤和失效机理。研究结果表明:T300/BMP350树脂基复合材料具有很好的耐高温性能。高温下0°方向的拉伸强度和模量保持率达到80%以上,90°方向的拉伸强度和模量保持率可以达到50%以上。高温环境对材料的极限应变影响不大,材料破坏模式均为脆性破坏。基于实验结果,对材料的强度随温度的变化进行拟合,预测了该材料在350℃时0°和90°的拉伸强度。
Static tensile test was carried out on 0 ° and 90 ° unidirectional laminates of T300 / BMP350 with different temperature, and the stress-strain response of the material at different temperatures was obtained. The effects of temperature on the mechanical properties of the material Performance impact. The thermal behavior of the material was analyzed by measuring the heat output of the material under high temperature and the ultimate strain at failure. By analyzing the stress-strain curves and failure modes of materials, the damage and failure mechanisms of materials are studied. The results show that: T300 / BMP350 resin-based composite has good high temperature performance. Tensile strength and modulus retention of 0 ° direction at high temperature of 80% or more, 90 ° direction tensile strength and modulus retention can reach more than 50%. High temperature environment has little effect on the ultimate strain of the material, the material failure mode is brittle failure. Based on the experimental results, the strength of the material is fitted with the change of temperature, and the tensile strength of the material at 0 ° C and 90 ° C is predicted.