It can be seen that the maximum stress of the part is 163.2mpa.<br>For the required stress of materials, according to Chapter 1 of Chapter 1, Volume 1 of Mechanical Design Manual (Sixth Edition):
It can be seen that the maximum stress of the parts is 163.2Mpa. For the required stress of materials, according to the first chapter of the first article of Volume I of Mechanical Design Manual (6th edition), there are: