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稳定裂纹扩展
stable crack growth
- 提出了含三相正交分布等尺寸微裂纹的准脆性材料稳定扩展的细观损伤演化模型。
A micro mechanical damage evolution model with the crack size effect was proposed for quasi brittle materials. - 提出了增加卸载区的范围，促使煤体裂纹稳定扩展，降低单位煤体储能从而控制冲击矿压发生的原理。
Under this condition, the preventive measure was increasing the porosity of coal mass and deceasing the circulating channels of gas and air. - 根据济钢第一炼铁厂5#高炉在2000年大修中的破损情况,分析筋条镶砖式冷却壁纵裂原因是冷却壁热面温度不稳定,而全覆盖式冷却壁由于其结构能使冷却壁本体温度变化幅度小,且有很强的抵抗裂纹扩展的能力,因而破损速度较慢。
But the full coverage cooling wall can keep structure itself little changing of temperature and have stronger capability to resist the extending of crack, so it can slow down the breakage rate.
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