A、<img width='53' height='41' src='/s/tiw/p3/UpLoadImage/2013-05-07/8754f873-adec-4ee5-91df-9aec233499a8.png'>
B、<img width='49' height='42' src='/s/tiw/p3/UpLoadImage/2013-05-07/7ab245fd-ac9f-4c18-87a6-848b69179de7.png'>
C、<img width='79' height='40' src='/s/tiw/p3/UpLoadImage/2013-05-07/4a1e4eab-efbf-49f5-8386-e307054c4407.png'>
D、<img width='77' height='40' src='/s/tiw/p3/UpLoadImage/2013-05-07/92df4fb1-1b20-4457-be57-c24e721f9ab6.png'>
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试题解析
A点处于中性轴处,该点在中性轴上无正应力作用,仅存在切应力,又
根据广义胡克定律得,