题目内容

对于等直梁,在以下情况中, 是错误的。

A. 梁的最大正应力数值,必出现在弯矩值最大的截面上
B. 梁的最大正应力值和最大剪应力值不一定出现在同一截面上
C. 梁的最大剪应力值,必出现在剪力值最大的截面上
D. 在同一截面上不可能同时出现最大正应力值和最大剪应力值

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