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复合材料裂纹敏感性的评定──(Ⅱ)HTA/6376和T300/M10的Ⅱ型分层扩展行为

, PP. 105-111

Keywords: 碳/环氧复合材料,裂纹敏感性,分层,应变能释放率

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Abstract:

应用ENF试验研究了HTA/6376和T300/M10两种碳/环氧复合材料的静态与疲劳层间断裂行为。在静态载荷下,两种材料均呈现脆性不稳定和稳定的裂纹扩展特性。在R=0.1且△GI大幅度变化的疲劳加载过程中,两种材料呈现稳定的裂纹扩展。采用位移控制方法,确定了裂纹扩展速率与循环应变能释放率的关系和应变能释放率门槛值。与T300/914C相比,HTA/6376和T300/M10具有较高的抗裂纹扩展能力。

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