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当三向应力圆为一个圆时,则主应力情况一定是( )

单选题
2021-09-06 21:41
A、σ1=σ2
B、σ2=σ3
C、σ1=σ3
D、σ1=σ2 或 σ2=σ3
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正确答案
D

试题解析

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