• 2021-04-14
    已知单元体的σ1、σ2、E、μ,主应变ε1、ε2均已知,那么ε3=?https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/66a5a29dc01441a999d5efb31bfc856f.png
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