Research on measuring tensile critical stress intensity factor of floor rock by hydraulic fracturing technique;
水压致裂技术测试底板岩体张开型临界应力强度因子
The critical stress intensity factors K_(IC) are determined for pl.
采用沥青混合料设计试验、三点弯曲试验和疲劳裂缝扩展试验,确定加筋沥青混凝土的临界应力强度因子KIC,测量每一种沥青罩面抗裂系统的裂缝扩展速率。
Two-parameter model was applied to determine the critical stress intensity factor K_(Ic)~s and critical crack tip opening displacement CTOD_c of concrete with different coarse aggregate sizes and silica fume dosages.
应用双参数模型确定混凝土在不同粗骨料粒径和不同硅灰掺量时的临界应力强度因子(K_(1c)~(?))和临界裂缝尖端张开位移(CTOD_c),同时利用特征长度l~(ch)研究粗骨料粒径和硅灰掺量对混凝土脆性的影响。
After the tests in 30%(WT) concentrations of sodium hydroxide solution with the 180 ℃,the crack growth rate and threshold stress intensity factors of the two steels were obtained,that were,the 16MnR steel between 0.
测得了180℃下30%NaOH溶液中两种材料的应力腐蚀临界应力强度因子和裂纹扩展速率,即16MnR材料的应力腐蚀裂纹扩展速率da/dt为0。
The crack propagation rate da/dt and critical stress corrosion factor KISCC of SPV490Q weld were gotten by experiments.
对SPV490Q钢焊接接头的楔形张开加载(WOL)预裂纹试样在不同浓度硫化氢溶液中进行了应力腐蚀试验,测定了焊缝的应力腐蚀临界应力强度因子KISCC和应力腐蚀裂纹扩展速率da/dt。
The generable proximate formula of dynamic stress intercity factor of simple edge crack found bar specimen in three point bending of NanLing marble is gotten and the critical dynamic stress intensity factor of the specimen is also obtained in medium load ratio.
在中等加载速率下,推导出对大理岩带垂直切口三点弯曲圆棒梁试件动应力强度因子的一般近似公式和断裂时的临界动应力强度因子的表达式。