Results 11 to 20 of about 1,086,884 (143)
Auto-focus technology and its application based on image processing [PDF]
, 2009 Auto-focusing technique is an important method to improve the precision,intelligentization,automatization for the indentation diameter measurement.The paper introduces an auto-focus method of indentation diameter measurement based on image processing ...
Chen, Xiaomei, Yang, Tao, Zuo, Yong
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APPLICATION OF SUPER-MICRO TESTER IN MEMS BONDING STRENGTH TEST
, 2005 研制微力学测试仪,对微电子机械系统中键合结构的强度进行测试.最大载荷为1.4 N,在载荷量程为450 mN时仪器的最高分辨力为10 μN.采用键合在玻璃基底上的硅悬臂梁作为试样.为模拟横力剪切破坏和扭转破坏工况,用微力学测试仪分别在悬臂梁的固定端和自由端施加载荷至试样破坏.测得相应的破坏载荷并计算出最大剪应力.对破坏残骸的显微观察发现,存在玻璃开裂和硅开裂2种失效模式.该技术为微电子机械系统(micro-electro-mechanical system,MEMS)键合结构的强度表征提供一种有效方法 ...
郇勇 +4 more
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He jishu传热管束在横流作用下会发生流弹失稳现象，这极易诱发传热管磨损和破裂，是蒸汽发生器设计和运行中必须重点考虑的安全问题之一。现有研究多集中于升力方向，曳力方向研究较少。但近期研究表明，曳力方向同样存在发生流弹失稳的可能性，因此，对曳力方向流弹失稳也需给予重视。本文利用计算流体力学（Computational Fluid Dynamics，CFD）模拟了横向流作用下单根柔性管在刚性平行三角形管束中的流场分布，结合后处理方法提取了流动通道内的时间延迟函数与衰减函数 ...
白 金, 赵 燮霖, 周 进雄
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Gaoya dianqi, 2021 电磁斥力机构是快速机械开关的核心部件,在快速合闸和分闸过程中巨大的电磁驱动力会给电磁斥力机构和整个机械传动系统带来强烈的瞬态冲击。针对该问题,文中对电磁斥力机构在合闸和分闸全过程中的机械特性和结构强度进行了研究。采用LS-DYNA建立快速机械开关的有限元仿真计算模型,并求解得到合闸和分闸全过程各零部件的机械运动特性和瞬态冲击强度。采用激光测距对某单断口快速机械开关进行了实验测量,得到合闸和分闸过程的时间—行程特性曲线,实验测量结果和仿真计算结果匹配良好。最后对仿真计算模型进行参数优化,从而降低合闸弹跳 ...
熊杰, 刘彬, 于海波, 刘国伟
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Heterogeneous structures have demonstrated great potential for overcoming the long‐standing strength–ductility trade‐off in metallic materials. In this study, a novel dual‐gradient structure, characterized by gradients in both grain size and precipitate distribution, was successfully constructed in an Mg–2Zn–0.8Gd (wt%) alloy sheet via sliding
Chunquan Liu +4 more
wiley +1 more source
Ultrasonic Vibration Assisted Laser Processing: A Hybrid Paradigm for Extreme Surface Enhancement
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Traditional laser processing techniques offer many advantages, but they often encounter limitations such as heat‐affected zones, recast layers, residual tensile stresses, and poor surface finish. The integration of ultrasonic vibration (UV) presents a promising hybrid approach to overcome these challenges by introducing beneficial effects like
Aziz Ul Hassan Mohsan +6 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
wiley +1 more source
, 2006 由功能互等定理导出用半权函数表示的各向异性板应力强度因子的解析表达式，并给出基于Reissner板理论含裂纹的各向异性板受弯曲、扭转和剪切作用的半权函数。计算含中心裂纹四边自由受纯弯曲作用板的应力强度因子，并与有关的结果进行比较，表明此方法简便 ...
杨丽敏, 曾晓辉, 柳春图
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Sodium‐ion batteries (SIBs) offer a promising, cost‐effective alternative for large‐scale energy storage due to the abundance of sodium. However, their practical deployment is challenged by sluggish interfacial kinetics and unstable interphase formation, which severely limit performance across wide temperature ranges. Here, we demonstrate that
Mingxing Zhang +10 more
wiley +1 more source