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用光弹性法分别研究了一组含软包体、等模量包体， 及硬包体的复合模型中的应力及其变化。结果表明， 在硬包体中的应力更高， 硬包体的存在乃是复合模型中形成和积累高应力区的结构构成条件， 从而为坚固体孕震模式的力学机制研究提供了基本的实验依据。
Using the photoelastic method, the stress and the change of a group of composite models with soft inclusions, equal modulus inclusions and hard inclusions were studied respectively. The results show that the stress in hard inclusions is higher, and the hard inclusions exist in the composite model to form and accumulate high-stress zones, which provides a basic experiment for the mechanics mechanism of solid-body earthquake mode in accordance with.