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一拉伸钢杆,弹性模量E,200GPa,比例极限为200MPa,今测得其轴向应变ε,0.0015,则横截面上的正应力( )。

A、σ,Eε,300MPa

B、σ,300MPa

C、200MPa,σ,300MPa

D、σ,200MPa

时间：2021-07-17 23:55 关键词：建筑环境与能源应用工程专升本建筑工程力学 2020级第一学期期末考试

答案解析

C

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