Structure deigned with optimization and reliability Calculation, can not only save material costs and meet the practical engineering needs, but also conducive to on-site construction.
经优化设计和可靠性计算后的结构，既可以节约材料成本，又能满足实际工程的需要，并且有利于现场施工。
In the case of the limited level density of the material surface energy, the fracture stress and the calculation formula of the engineering damage were studied.
本文研究考虑损伤时材料的断裂应力，推导出了在表面能密度有限的情况下，损伤断裂应力的计算公式。
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