, 1988 本文研究爆炸处理时裂纹在应力波作用下的动态扩展行为,分别讨论了入射波、反射波和应力波持续时间的作用,并根据线弹性断裂力学复合型准则和动态断裂准则对裂纹的扩展进行了分析,作者建议用吸能块的办法控制爆炸处理时裂纹的扩展 ...
孙琦清, 郑哲敏, 高桦
core
Water inrush mechanism and the minimum safety thickness of the rock wall of a tunnel crossing a fault fracture zone [PDF]
Objective With the relocation of major national strategic plans to western China, railway construction has gradually focused on the complex and dangerous mountainous regions of Yunnan, Sichuan, and Xizang Provinces, where the proportion of tunnels along
XIAO Kun, YUAN Dong
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Influence of the position and depth of pre-cutting kerfs on the rock breaking by SBM cutter [PDF]
The combination of water-jet and disc-cutter rock breaking is a key technology to improve the rock breaking efficiency of the full-face shaft boring machine and achieve the mechanized development of deep resources.
Chenxi DING +5 more
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An efficient nesting sub-domain gradient smoothing integration algorithm for Galerkin meshfree methods [PDF]
, 2016 ·无网格法直接通过节点信息建立形函数，不依赖于节点之间的有序拓扑连接，能够建立任意高阶连续的整体协调形函数和位移场。在过去的二十多年里，无网格法得到了快速发展，在许多领域得到了成功应用，例如，裂纹扩展模拟，板壳分析，大变形模拟和断裂破坏模拟等。然而，由于无网格形函数一般不是多项式，且各个形函数的支撑域与背景积分子域通常不重合，因而伽辽金无网格法为了保证计算精度，需要在每个背景积分子域内采用高阶的高斯积分方法进行数值积分。但高阶高斯积分会明显降低无网格法的计算效率，不利于无网格法的大规模工程应用。因此 ...
吴俊超
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[Effects of surface treatment on the phase and fracture strength of yttria- and magnesia-stabilized zirconia implants]. [PDF]
Beijing Da Xue Xue Bao Yi Xue Ban, 2023 Ding Q +5 more
europepmc +1 more source
[Effect of porous surface structure on fatigue strength of 3D printed zirconia]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanZhao J +6 more
europepmc +1 more source
A homogenization method on crack growth on orthotropic steel decks [PDF]
, 2018 Chen, A., De Backer, Hans, Wang, Benjin
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一起500 kV线路多支复合绝缘子芯棒酥朽发热特征及缺陷起始原因分析
Dianci bileiqi针对一起500 kV同塔双回线路多支复合绝缘子发热事件，开展了现场不同角度的无人机红外测试，对酥朽缺陷绝缘子的温差、发热区段数量及长度进行了分析，并对更换后的发热绝缘子开展外观检查、红外复测、剖检及工业CT、带护套水扩散试验，对比了实验室与现场红外测试差异，通过剖检对比了芯棒酥朽区段与发热位置的关系，并对酥朽原因进行了讨论。结果表明，现场38支酥朽复合绝缘子，94%的绝缘子为1处或2处芯棒发热、6%出现3处发热，79%的绝缘子发热区段长度最长为1至2个伞裙单元、21%存在3-5个伞裙单元的连续发热 ...
李特 +5 more
doaj
[Progress in clinicopathological diagnosis of oral potentially malignant disorders]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiCui Y +5 more
europepmc +1 more source
[Numerical simulation study of fracture mechanics of the atherosclerotic plaque]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2021 He J, Zhong W.
europepmc +1 more source