Results 31 to 40 of about 5,571 (162)
Brief Analysis of the Development of Mechanical Research and Trends of Grouted Connection of Offshore Wind Turbine [PDF]
, 2023 [Introduction] The connection between offshore wind turbine foundation and superstructure is usually made by grouting. It is crucial to ensure the safety of the grouted connections, and the study of grouted connections is always a key and difficult point.
Kan LIAO, Ke CHEN, Li ZHANG
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A compressive damage model for a rock considering the microcrack mechanical behavior [PDF]
The contributions of the microcrack sliding and propagation to the rock total deformation, the mixed propagation criterion of the microcrack, and the influence of the rock damage degree on the number of the activated microcracks are not completely ...
Cui LIU +5 more
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热-湿-力耦合作用对高温后方钢管混凝土短柱轴压力学性能影响试验研究
Jianzhu Gangjiegou Jinzhan火灾发生时钢管混凝土内部会产生水蒸气，为探讨热-湿-力耦合作用对高温后方钢管混凝土轴压力学性能的影响，进行了10根高温后方形钢管混凝土短柱轴压力学性能试验，研究排气孔数量、布置位置、轴压比和升温时间等参数对其破坏形态、轴压刚度与剩余承载力等力学性能的影响。试验结果表明，试件破坏形态表现为压溃破坏；在其他参数相同的情况下，与升温前相比，随着排气孔数量从2个增加至4个和6个，轴压刚度分别降低了69.1%、73.3%、76.4%，剩余承载力分别降低了15.8%、16.2%、21.7 ...
薛媛媛 +4 more
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Shiyou jixie, 2015 压缩机曲轴在工作中受力情况极为复杂，曲轴作为压缩机最重要的零部件之一，一旦失效将会导致整个压缩机的损坏。鉴于此，以2RDS压缩机曲轴为例，采用INVENTOR三维建模软件建立曲轴模型，使用有限元分析软件ABAQUS对其进行应力分析。分析结果表明，曲轴的应力最大位置均出现在主轴颈-I的油孔处，在曲柄与曲柄销和主轴颈与曲柄销过渡圆角处均出现了应力集中，但是最大应力均小于材料的许用应力，结构不会出现静强度破坏。曲轴在压工况时的受力比拉工况时的受力更加恶劣，应力集中情况更加严重 ...
侯小兵
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Experimental and theoretical analyses of three-dimensional surface crack propagation [PDF]
, 2017 2011-2012 > Academic research: refereed > Publication in refereed journalVersion of ...
Han, ZC +4 more
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, 2017 In order to study the mechanical properties of early-age concrete-filled steel tube (CFST) under continuous construction process, an experimental investigation on six concrete-filled circular steel tubular short columns under multi-level loading was ...
Bao, Hao +3 more
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Jianzhu Gangjiegou Jinzhan, 2013 为研究内配方钢管的钢管混凝土叠合柱轴压工作性能,基于合理的钢材和混凝土材料本构关系模型,采用有限元法对钢管混凝土叠合柱轴压荷载-变形关系曲线进行了计算。采用数值分析方法,对叠合柱轴压工作性能进行较为细致分析,包括轴压破坏模态、轴压荷载-变形全过程关系、应力发展规律以及钢管和混凝土之间的相互作用。研究方法和结论可为相关研究参考。
尧国皇, 陈宜言, 郭明, 赵群昌
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Study on strength limit neighborhood range of gas-bearing coal rock under different loading conditions [PDF]
The occurrence mechanism of coal and gas outburst disasters is still unclear. According to the rheological hypothesis, gas-bearing coal and rock may enter the “strength limit neighborhood” under long-term load, and it is more likely to be destroyed by ...
Bo WANG +6 more
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, 2020 针对受载煤体卸压过程裂隙发育数据难以捕捉的现状,设计了受载煤体伪三轴瓦斯渗流实验,完成了受载煤体加载和卸载过程的应力-应变-渗透率动态监测。同时基于能量守恒定理,开展了卸载过程中不同卸载速率下的能量分配比较,阐释了卸载速率对裂隙发育和渗透率变化的控制作用,并通过煤样裂隙监测数据对比予以验证。研究结果显示,卸载过程中的煤体裂隙结构受卸载速率影响,围压卸载速率越高,I类和II类裂隙越发育(所占比率增高),I类裂隙数量较原始数量增幅甚至超过1倍,II类裂隙数量提高74.13 ...
刘永茜 +4 more
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Jianzhu Gangjiegou Jinzhan, 2015 为了研究椭圆钢管混凝土柱的轴压性能和承载力,通过ABAQUS程序建立了轴压作用下椭圆钢管混凝土柱的数值分析模型,考虑了复杂接触问题、材料非线性和椭圆特征。利用试验结果验证了数值分析模型的准确性。开展了轴压作用下椭圆钢管混凝土短柱的诸多参数分析,评价了各参数对组合柱轴压承载力和刚度的影响,揭示了椭圆钢管混凝土短柱的破坏模式和受力机理,基于统一理论提出了椭圆钢管混凝土短柱的轴压承载力简化计算方法。研究结果表明,椭圆钢管混凝土短柱在轴压作用下的破坏模式包括剪切破坏、局部鼓曲破坏和整体鼓曲破坏 ...
沈奇罕, 王静峰, 王伟, 王珺
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