Results 31 to 40 of about 13,971 (184)
A FEM-DEM Coupled Multiscale Analysis Method for Study of Mechanical Behaviors of Concrete [PDF]
, 2017 混凝土是一种多相复合材料，由于材料非均匀各向异性的特点，其力学性能十分复杂，但作为建筑结构中最广泛使用的材料之一，研究能够可靠高效分析其力学行为的数值模拟方法有非常重要的意义。有限元法（FEM）目前主要集中于对混凝土宏观力学行为的模拟，但是由于基于连续介质力学假设，对混凝土开裂后细观力学性能的分析较为困难。离散元法（DEM）虽然对于混凝土的细观开裂和局部破坏有较好的模拟效果，但是由于计算耗时过大，限制了其在工程问题的应用范围。因此，本文想开发一种结合两者优点的数值模拟方法 ...
刘轲奇
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Bending and springback analysis of bimetal composite plates during leveling [PDF]
, 2016 An analytical model of section elastoplastic state evolution paths was built for bimetal composite plates under different assemble patterns during bending and leveling based on engineering elastoplastic mechanics.
GUAN Ben, QIN Qin, ZANG Yong, ZHANG Chao
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Danger-relief principle and parameter optimization of borehole energy relief for rock burst in coal road floor [PDF]
, 2023 The mine area located in northwest of China is seriously affected by horizontal tectonic stress. The borehole is widely used to control coal burst and is an effective, convenient and safe measure.
Tao CHEN
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A Systematic Scoping Review of Self‐Regulated Learning With AI in Language Education
International Journal of Applied Linguistics, EarlyView.ABSTRACT The rapid development of artificial intelligence (AI) technology has brought new opportunities for second/foreign language (L2) education while also raising concerns about the use of AI tools. This systematic scoping review provides a snapshot of the current state of research situated at the intersection of self‐regulated learning (SRL) and AI
Zheng Zhang, Sihan Zhou, Barry Bai
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2013 为了考察国产Q460高强钢焊接箱形压弯构件的力学性能,以数值积分法和有限单元法对7个已有焊接箱形压弯构件试验进行了数值分析。试件宽厚比分别为8、12、18,长细比分别为35、50、80。介绍的数值模型中考虑了实测的初始挠度、初始偏心及残余应力对构件极限承载力的影响,采用简化的残余应力分布模型、实测残余应力分布与理想弹塑性材料模型、线性强化材料模型相组合,对Q460高强钢焊接箱形压弯构件的极限承载力与荷载-挠度曲线进行了数值计算。为了验证数值分析的准确性,将预测结果与已有试验结果进行了对比,分析结果表明 ...
闫晓雷, 李国强, 陈素文
doaj
Gaoya dianqi, 2023 高压大截面电缆运行电流大，发生短路故障时产生的短路电动力大大高于普通电缆，更容易造成缆体和固定金具的损伤，威胁输配电安全。为了分析高压大截面电缆短路电动力对缆体和金具的影响，文中建立了330 kV高压大截面品型垂直蛇形敷设电缆的电磁—结构耦合有限元模型，使用Maxwell瞬态电磁场分析法计算出电缆的短路电动力体密度分布；采用顺序耦合法将电动力体密度耦合至结构场计算出电缆金具的应力分布；对缆体磁场分布、受力时变特性及金具的应力分布进行了分析。结果表明，缆体短路电动力的幅值随时间周期性衰减 ...
牛冲宣 +5 more
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, 2016 中国地质调查局立项开展的渤海海峡跨海通道地壳稳定性的调查评价是重大涉海工程前期的基础性工作,该项目在收集已有成果资料的基础上,对渤海海峡区域进行了系统的地球物理勘测与研究,分析了灾害地质类型, 甄别出了主要的活动断裂,开展了渤海海峡及邻区的外围地震活动性和地壳层析成像研究,并进行了地应力、微震实地长期监测 ...
赵铁虎, 赵铁虎 齐君
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Distribution pattern and influencing factors of in-situ stress for deep levels in Shoushan No.1 Coal Mine [PDF]
To investigate the distribution pattern and influencing factors of in-situ stress for deep levels in the Shoushan No.1 Mine, according to the measured in-situ stress data of the mine, the tectonophysics and rock mechanics and numerical simulation methods
Deyong GUO +3 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Sodium‐ion batteries (SIBs) have emerged as promising candidates for large‐scale energy storage due to their cost‐effectiveness and resource abundance. However, challenges such as sluggish ion diffusion kinetics, structural degradation, and interfacial instability hinder their practical applications.
Yunze Wang +7 more
wiley +1 more source
Shiyou jixie, 2014 利用ABAQUS有限元软件建立了油管挂三维简化模型，研究开口对应力分布及承载能力的影响，将出油口直径与壁厚进行比较，分析不同出油口直径和壁厚配置对应力分布的影响。建模时将油管挂简化为具有大尺寸侧开口的内压圆筒，采用20节点2阶六面体单元划分网格。分析结果表明，开口内径比对承载性能的影响呈先降低后回升的趋势，其作用机理在于小直径开口对局部应力突变影响较大；侧向开口增加局部应力，导致应力分布不均匀。
唐彪 +5 more
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