Results 41 to 50 of about 2,365,030 (141)
Shiyou jixie, 2014 通过对双金属密封结构进行失效分析，得出失效的主要原因是：密封结构内部支撑角度和倒角半径的大小设计不合理导致弹性元件上的应力过大和应力集中，加速了弹性元件磨损和老化。利用有限元分析软件Workbench分析了O形橡胶圈上最大Mises应力和最大剪切应力在不同支撑角度和倒角半径下的分布情况，并对支撑角度和倒角半径进行了优选。分析结果表明，双金属密封结构的支撑角度和倒角大小对O形橡胶圈的应力影响较大；当支撑角度为15°、倒角半径为0.3 mm时，O形橡胶圈最大Mises应力和最大剪切应力最小 ...
肖祥 +4 more
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Dianci bileiqi, 2022 以三角密封结构在高压复合绝缘子中的密封性能为分析主体，依据应变能理论的数值拟合方法，在试验测试获得密封用橡胶材料力学性能的基础上，对三角密封结构中O形橡胶密封圈的应力及变形进行了非线性仿真分析。首先分析不同压缩率下三角密封结构的应力及变形，得到变形随压缩率的变化规律，预压缩应力随压缩量变大而趋于增大，确定了易发生密封失效的应力集中区域分布于密封圈挤压后的下部左右两侧。然后基于不同气压下三角密封结构的密封性能进行研究，分析了应力集中区域随着内压的增大向作用力一侧移动 ...
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Inverse Thermal Softening Behavior in a High‐Entropy Alloy Under Various Strain Rates
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Although face‐centered cubic high‐entropy alloys (HEAs) have received extensive attention and in‐depth research, most existing studies focus on single temperature or strain rate conditions, lacking systematic investigations into deformation mechanisms under extreme thermomechanical coupling environments.
Zhi Wang +6 more
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, 1987 本文介绍一种压电式应力计,它的主要性能是:测量量程为10-1000kgf/cm~2;响应时间小于7μs;线性误差小于士1％;综合应力测量误差小于±10％,该应力计可用于测量土、岩石和混凝土介质中的动态应力 ...
张挺, 金若冰
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Microstructural characterization of Li0.32La0.56Fe0.01Ti0.94Sb0.06O3 (LLFeTSO) using AC‐TEM revealed that Fe3+/Sb3+ ion co‐doping induces the migration of lattice oxygen to grain boundaries (GBs), enhancing GB conductivity. However, the atomic arrangement at the GBs remains highly ordered and lacks sufficient cation vacancy carriers.
Binxuan Jiang +8 more
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Biomass‐based hydrogels are widely regarded as ideal substrates for self‐powered wearable sensors. However, the practical applications of hydrogels are commonly limited by their inherent low strength and toughness, which restrict their capacity to withstand repeated stretching, bending and other mechanical loads arising from human motion in ...
Boyu Du +9 more
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, 2009 骨组织内主要有三种细胞，骨细胞位于胞外矿物质沉积形成的骨陷窝内，成骨细胞与破骨细胞位于骨小梁的表面。骨细胞与成骨细胞都可通过间隙连接形成网络结构1。大多数学者认为骨细胞网络可探测力学信号，进而传递到成骨与破骨细胞并最终调控骨的生长与吸收。骨内钙信号的响应和传递与细胞的增殖、凋亡和分化密切相关2，同时大量研究也表明力学刺激精确控制着钙信号传导的时间和空间特性3。胞浆内力致钙离子的增加主要来自细胞内质网和胞外溶液；同时细胞间钙传递主要有两个途径，即间隙连接和胞外ATP扩散 ...
郭向东, 龙勉, 霍波
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Biomass‐Derived Laser‐Induced Graphene: From Precursor Chemistry to Device Integration
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Laser direct writing provides a mask‐free route for converting suitable carbon‐containing precursors into patterned, porous, and conductive laser‐induced graphene (LIG) networks. Although LIG was initially demonstrated mainly using aromatic synthetic polymers, such as polyimide, biomass precursors introduce renewable feedstocks with highly ...
Wanjun Yin +10 more
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Insights for conservation from the Ecological Knowledge Games project
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Environmental conservation research requires robust methods for collecting large‐scale behavioral data and engaging diverse stakeholders in decision‐making processes. We (Y.P., A.B.D., and N.B.) created EcoKnowGames (Ecological Knowledge Games), a transdisciplinary project that develops knowledge games for conservation science and data ...
Yuan Pan +4 more
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Dizhen xuebaoCO2地质埋存（GCS）是各国缓解温室气体效应、实现“双碳目标”的重要手段。然而，向地层中大规模或过大速率地注入CO2可能使注入地层超压，进而改变断层或先存裂缝的抗剪强度，引起地面变形和诱发地震，给GCS工程带来环境风险。评估CO2注入引起的地质力学效应是GCS风险评估不可或缺的内容。本研究基于夹杂理论和格林函数方法，发展了前人的单断层力学评估方法，使其能够评估三条断层切穿型储层的大规模CO2注入问题。基于本研究提出的解析解开发了函数封装的模块化PYTHON脚本工具程序 ...
Jian Xie, Jiaxu Liu, Yijie Chen
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