主应力的计算公式
CALCULATION FORMULAS FOR PRINCIPAL STRESSES
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摘要: 在前人工作的基础上,运用一元三次方程的理论直接求解应力状态的特征方程,得到了实用的主应力计算公式.Abstract: For teaching purposes, practical calculation formulas for principal stresses are proposed, which are obtained by directly solving the characteristic equation of the stress state with the theory of one-variable cubic equation.