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体心立方Fe中 \begin{document}${ \langle 100 \rangle}$\end{document} 位错环对微裂纹扩展影响的分子动力学研究
, 2020 在辐照环境下, 载能粒子与材料相互作用导致材料中原子移位, 造成辐照损伤. 其中, 由辐照形成的过饱和自间隙原子团簇形成的间隙型位错环, 是体心立方Fe为基的材料中常见的辐照缺陷之一, 其与材料中其他缺陷之间相互作用, 是导致辐照硬化、脆化、肿胀及蠕变等辐照损伤的原因之一. 除此相互作用外, 在材料表面或内部沿晶界、沉积相、惰性气体形成的气泡所导致的微裂纹, 是诱发辐照促进应力腐蚀开裂的重要原因. 因此, 理解辐照条件下间隙型位错环与微裂纹之间的相互作用, 是理解辐照促进应力腐蚀开裂微观机制的重要一步.
梁晋洁, 高宁, 李玉红
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Experimental study of failure behavior of disturbed zone around an opening in non-persistent jointed rock masses [PDF]
, 2017 2003-2004 > Academic research: refereed > Publication in refereed journalVersion of ...
Lin, P, Tang, CA, Wong, RHC, Zhou, WY
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Jianzhu Gangjiegou Jinzhan, 2022 采用基于断裂力学的有限元法对焊接H形钢梁的疲劳裂纹扩展过程进行了数值模拟。给出了模型的基本假定：初始裂纹为半径1.016 mm的圆形、裂纹中心位于受拉翼缘与腹板之间焊缝焊根处、裂纹前缘由3~4段1/4椭圆弧线控制、在裂纹前缘端点处与内部点处分别采用不同的Paris公式系数、以疲劳裂纹深度穿透受拉翼缘壁厚或SIF超过断裂韧性为循环终止条件。采用二次多项式外推插值的方式对H形钢梁裂纹前缘端点处以及紧邻端点的个别结点处直接输出的应力强度因子（SIF）计算值进行了修正。通过试验验证 ...
肖顺, 童乐为
doaj
Aprediction model for the very high cycle fatigue life for inclusion-FGA (fine granular area) -fisheye induced fatigue failure [PDF]
, 2017 A prediction model for the very high cycle fatigue life for inclusion-fine granular area (FGA) -fisheye-induced failure was studied in this work. Combined with the experimental results of Cr-Ni-W alloy steel, a local crack initiation life model (LCIL ...
DENG Hai-long +3 more
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Unloading deterioration and mechanism of rock under different loading and unloading stress paths [PDF]
, 2022 In order to study the failure mechanism of deep coal seam floor under unloading, pseudo-triaxial mechanical tests were carried out under different loading and unloading stress paths.
Fengda ZHANG, Qiuge YU, Yujun ZHANG
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疲劳荷载特性对8.8级M24高强度螺栓疲劳裂纹扩展机理影响探析
Jianzhu Gangjiegou Jinzhan, 2023 为研究常幅疲劳荷载特性对高强度螺栓疲劳裂纹扩展的影响，针对钢结构端板连接用8.8级M24高强度螺栓在不同应力比/应力幅作用下常幅疲劳试验所得到的24个试件断口形貌进行定量分析，并采用ABAQUS软件数值模拟高强度螺栓应力集中情况，探讨含初始裂纹高强度螺栓裂纹尖端应力强度因子与荷载特性、预制裂纹形状之间的关系。结果表明：在轴向受拉疲劳荷载作用下，螺母与螺栓啮合第1圈螺纹处为疲劳断裂最不利位置；试件断口稳定扩展区面积与应力比/应力幅呈负相关，快速扩展区面积与应力比/应力幅呈正相关 ...
樊丽轩 +4 more
doaj
Fatigue Crack Growth Rate Curve Based on the CJP Model and Its Application Method [PDF]
, 2018 Fatigue crack growth rate tests of commercial pure titanium specimens with 5 different height-width ratios of CT specimens using the digital imagine correlation technique are carried out.
YANG, B
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Damage tolerance analysis of wading structures of amphibious aircraft based on Franc3D
Xibei Gongye Daxue Xuebao, 2022 Aiming at the combined action effect of the corrosive environment of amphibious aircraft wading structures and random loads including water surface take-off and landing impact, based on the standard load spectrum TWIST of transport aircraft, considering ...
HE Erming +4 more
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He jishu在第四代先进反应堆钍基熔盐堆（Thorium Molten Salt Reactor，TMSR）中，高温含缺陷构件的寿命预测是结构完整性评估的重要环节。在该研究中，首先基于随时间变化的蠕变断裂力学，采用有限元分析（Finite Element Analysis，FEA）软件的围线积分方法计算蠕变断裂参量C*，结合Python语言编写的自动化分析程序，预测了GH3535合金紧凑拉伸试样C（T）的蠕变裂纹扩展（Creep Crack Propagation，CCP ...
王 雯, 王 晓艳, 李 志军
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Fatigue behavior of powder metallurgy superalloy FGH97 [PDF]
, 2016 The fatigue crack growth rates of powder metallurgy (P/M) superalloy FGH97 with different grain sizes, γ' phase sizes and Hf contents were measured at a 650℃ high temperature condition and compared with those of FGH95 and FGH96 alloys.
DONG Jian-xin +4 more
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