已知图示杆件的许用拉应力[σ] = 120MPa,许用剪应力[τ] = 90MP

恬恬2019-12-17  3

问题 已知图示杆件的许用拉应力[σ] = 120MPa,许用剪应力[τ] = 90MPa,许用挤压应力[σbs]=240MPa,则杆件的许用拉力[P]等于:

选项 A. 18. 8kNB. 67. 86kNC. 117. 6kND. 37. 7kN

答案D

解析[img]/upload/tiku/233/2659082_1.jpg[/img]
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