有机玻璃疲劳裂纹扩展试验研究

Study on perspex fatigue crack propagation specimen shape

为研究试样形状对有机玻璃疲劳裂纹扩展性能的影响,对M(T)和C(T)两种不同形状试样进行测试,运用Paris公式曲线拟合方法,对比M(T)和C(T)两种试样形状所获得的疲劳裂纹扩展数据,分析实测数据点分散性的大小并分析其原因。实验结果表明:在有机玻璃的疲劳裂纹扩展性能测试试验中,C(T)试样优于M(T)试样,能够更准确地表征有机玻璃的疲劳裂纹扩展性能。

In order to study the shape of specimen extension property of organic glass fatigue crack,the M(T) and C(T) two different shapes of specimen were tested,using the formula of Paris curve fitting method,compared to the M(T) and C(T) fatigue crack extension obtained data two the shape of specimen, analyze the measured data points dispersion size and its causes. The resulst show that C(T) is better and more accurate than M(T) to characterise the fatigue crack propagation in the fatigue crack extention performance test of organic glass.