...据 Keywords: Concrete, Internal crack, 3D imaging, Volume rendering, Impact-echo 1. [gap=276]关键词：混凝土，内部裂纹，体积渲染，三维成像，影响回波1。
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... 内部结构 interior structure 内部裂纹 internal fissure 内部质量 internal soundness ...
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... underbalance ==> 欠平衡,平衡不足 underbead covering ==> 内部裂纹 underbead crack ==> 焊道下裂纹,焊缝下裂纹 ...
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This project is divided into two parts: one is theory research, the other is practical implement. The key point of the former part is inner crack of round steel during the last rolling pass.
项目研究分为理论研究和现场实施,其中理论研究对成品圆钢内部裂纹的出现进行了模拟研究。
参考来源 - 大规格圆钢断面应力的有限元分析·2,447,543篇论文数据，部分数据来源于NoteExpress
材料内部裂纹通过断开梁单元来模拟。
Cracks in material were simulated through breaking beam elements.
由于水蒸发吸收的回流，可能会产生内部裂纹和失败。
As absorbed water vaporise in reflow, internal cracks and failures may be created.
连铸坯内部裂纹、表面裂纹、鼓肚和中心偏析等缺陷的形成都与冷却有着紧密的联系。
The formation of billet internal cracks, surface cracks, the dark belly and centres segregation defects has close ties with cooling.
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