工程力学 习题答案 第4章 轴向拉伸和压缩

第4章轴向拉伸和压缩习题答案4-1 (a) Fni =50kN FN2 =10kN FN3 =-20kNFN1 = F FN2 =0 FN3 = FFN1 =0 FN2 = 4F Fn3 = 3FFN