Calculation methods of crack spread length are investigated by means of stress theory and brittle fracture theory.
本文从强度理论和脆断理论两方面对此情况下裂纹传播长度的计算方法进行探讨。
The 3-2-1 crack spread compares the acquisition cost of three barrels of crude with the selling price of two barrels of gasoline and one barrel of diesel.
1裂解价差的比较对象是，购买三桶原油的成本与两桶汽油和一桶柴油售价之差。
Fracture lines start from the outside and spread over the whole cross section, particularly starting in the fillet area and very often after a fatigue crack propagation.
断裂面从轴承部位外部开始延伸到整个截面。典型的是从圆弧部开始，常常会由于疲劳而产生的裂纹的扩展后引起的。
The fatigue limit of condenser copper tube was reduced by working condition which aggravated the spread of crack.
冷凝器铜管的工作环境使疲劳极限大为降低，加剧了疲劳裂纹的扩展。
The fatigue limit of condenser copper tube was reduced by working condition which aggravated the spread of crack.
冷凝器铜管的工作环境使疲劳极限大为降低，加剧了疲劳裂纹的扩展。
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