A stiffness matrix of hybrid crack tip element is presented based on the modified variational principle with relaxed continuity requirements and the stress and displacement fields of crack tip zone.是什么意思_A stiffness matrix of hybrid crack tip element is presented based on the modified variational principle with relaxed continuity requirements and the stress and displacement fields of crack tip zone.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句