在其他条件相同时,( )时的疲劳极限最大。A. r= +1 B. r=0 C. r=0. 5 D. r= -1

作者: rantiku 人气: - 评论: 0
问题 在其他条件相同时,( )时的疲劳极限最大。 A. r= +1 B. r=0 C. r=0. 5 D. r= -1
选项
答案 A
解析 当时,即最小应力等于最大负应力,此时疲劳极限最小;当r= + 1时,疲劳极限最大。

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