等直圓軸抗扭剛度為GIp(圖5-4-9),軸的中部Ⅱ段端部相對(duì)扭轉(zhuǎn)角為:()
A.6ma/GIp B.8ma/GIp C.10ma/GIp D.14ma/GIp
等直圓軸,作用外力偶矩m1和m(圖5-4-8),軸總扭轉(zhuǎn)角為零時(shí)m1與m的關(guān)系為:()
A.m1=4m B.m1=3m C.m1=2m D.m1=1.5m
等直圓軸直徑為d(圖5-4-7),軸內(nèi)的扭轉(zhuǎn)最大剪應(yīng)力為:()
A.4m/Wp B.5m/Wp C.6m/Wp D.8m/Wp