平面应力状态最大主应力方位的确定

Determination of the Orientation of the MaximumPrincipal Stress in Plane-Stress Condition

推证了一个确定最大主应力的方位公式，通过结合主应力公式，可直接明确地给出最大主应力及最小主应力的方位，从而可避免再用应力圆或实践经验判断主应力方位的过程．

A formula for determining the orientation of the maximum principal stress hasbeen derived.Cornbined with the principal stress expression, the orientations of the maxi-mum and minimum principal can be determined directly,avoiding the judgement process ofusing stress mohr circle or by experience.