有这样一个问题 如下 请大侠指教 谢谢A particular type of steel has an ultimate strength of 80，000 pounds per square inch(psi), an elastic limit of 60，000 psi,and a yield strength of 62，000. An allowable design stress of 20，000psi is used .What is the factor of safety based on the ultimate strength?a. 0.25 b 0.33 c3 d 3.1 e.none of the above请问答案是哪一个 为什么 谢谢
发表于 2021-9-2 14:10:41
