一根实心截面圆轴。其直径为D ,则其极惯性矩IP为 。若该截面扭矩T=6kN·m,直径D=100mm,则横截面上b点的切应力= (注明单位)。/ananas/latex/p/153801
一根实心截面圆轴。其直径为D ,则其极惯性矩IP为 。若该截面扭矩T=6kN·m,直径D=100mm,则横截面上b点的切应力= (注明单位)。/ananas/latex/p/153801
23.冲床如图所示,若要在厚度为t的钢板上冲出直径为d的圆孔,则冲头的冲压力P必须不小于______________。已知钢板的剪切强度极限和屈服极限。/ananas/latex/p/153801/ananas/latex/p/43402https://p.ananas.chaoxing.com/star3/origin/3d71da08980c7d9e8c49430faafa12fa.png
23.冲床如图所示,若要在厚度为t的钢板上冲出直径为d的圆孔,则冲头的冲压力P必须不小于______________。已知钢板的剪切强度极限和屈服极限。/ananas/latex/p/153801/ananas/latex/p/43402https://p.ananas.chaoxing.com/star3/origin/3d71da08980c7d9e8c49430faafa12fa.png
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