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MMB试验夹具(ASTMD6671)

MMB试验夹具(ASTMD6671)

CFRP等复合材料采用层压结构，层间断裂强度和层间断裂韧性低。当受到冲击负荷时，层间容易产生剥离和裂纹，且剥离有可能导致产品断裂。一般来说，裂纹尖端的变形模式有模式I(开口型)、模式II(面内剪切型)、模式III(面外剪切型)以及混合型。MMB试验(the Mixed Mode Bending Test)可以测试模式I和模式II的混合模式，还具有能够连续改变模式I和模式II的比率，且模式比随着裂纹进展而几乎无变化的特点。

本夹具采用悬臂弯曲方式，获取复材层间裂纹韧性，是一种比较特殊的弯曲测试。用粘合剂将“测试标签”连接到试样的开口侧。待粘合剂足够干燥后，将其连接到测试夹具上。在拉伸过程中，记录产生裂纹时的受力情况。

4-1-1

特点

特点1：采用悬臂弯曲方式进行试验。

特点2：可测试模式I和模式II的混合剪切模式。

规格

1 KN

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