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1)  critical crack point
临界开裂点
2)  subcritical fracture
亚临界开裂
1.
Through calculating the stress intensity factors and analyzing the velocity of cracks opening, it is provedthat subcritical fracture exists in PBX material, which will put a light on studying the stor.
通过计算应力强度因子和分析裂纹尖端扩张速度,证实PBX材料中也存在亚临界开裂,为PBX材料结构件的储存开裂研究提供了新的思路和方法。
3)  critical cracking risk
临界开裂风险
1.
The probability of concrete structure cracking at early age is estimated by cracking probability and critical cracking risk with probabilistic method for a real case of concrete wall.
方法以可靠度理论为基础,建立了混凝土结构早龄期开裂的分析模型,利用开裂概率和临界开裂风险来分析与预测混凝土结构早龄期的开裂情况,并将分析模型在混凝土挡土墙工程中应用。
4)  critical cracking temperature
临界开裂温度
1.
The critical cracking temperature of asphalt is the low temperature evaluation index of AASHTO Mp1a criterion,which is calculated based on the results of bending beam rheometer and the direct tension test.
沥青的临界开裂温度是AASHTO Mp1a规范提出的沥青低温评价指标,是根据弯曲梁流变仪和直接拉伸仪的结果经过数据回归计算得到的。
5)  fracture critical value
开裂临界Cf值
6)  critical crack mouth opening displacement
临界裂缝嘴张开位移
1.
The results show that G_(fF),critical crack mouth opening displacement(δ_(fmc)) as well as critical crack tip opening displacement(δ_(ftc)) of SFHAC increase linearly with the increas.
结果表明:随着φf的增加,GfF、临界裂缝嘴张开位移(fδmc)、临界裂缝尖端张开位移fδtc均线性增加,钢纤维高强混凝土断裂能增益比、临界裂缝嘴张开位移和临界裂缝尖端张开位移的增益比亦基本呈线性增加。
2.
Through wedge splitting tensile test, the effect of the polypropylene fiber dosage upon the stress intensity factor (KpIC), fracture energy (GpF) and critical crack mouth opening displacement (δpmc) of polypropylene fiber reinforced high-strength concrete (HSC) were studied.
通过楔劈拉伸试验,探讨了聚丙烯纤维掺量对聚丙烯纤维高强混凝土断裂韧度(KpIC)、断裂能(GpF)和临界裂缝嘴张开位移(δpmc)的影响。
补充资料:临界点干燥法
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性质:扫描电镜样品的一种处理方法。某些样品(如生物样品)因其表面附有黏液或体内的水分等,用扫描电镜观察前需进行干燥处理。普通干燥方法常因试样受到液体表面张力影响而变形,影响观测结果㈠临界点干燥法则将试样与碳酸混合,放于加压容器中加热,在31℃,0.73MPa的临界点时,碳酸逐渐放出CO2而使样品得以干燥又不改变样品表面形貌。

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