复合材料层合板在一些特殊的情况下可能出现叁模量现象.本文给出了一叁模量材料的实例,并对其制备的梁的极限承载力和挠度等进行了实测.在此基础上,推导了叁模量梁的极限承载力和极限挠度的计算公式.经与试验结果对照,证明对叁模量特征显著的材料,计算时应考虑三模量特性.用叁模量梁理论可以预测叁模量梁的极限承载力和挠度等.
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