Results 31 to 40 of about 15,411 (192)
Rare Metals, EarlyView.ABSTRACT Although lithium metal has been regarded as an ideal anode material for high‐energy‐density batteries, its practical applications remain hindered by many serious challenges. Three‐dimensional (3D) porous Cu current collectors demonstrate potential in ensuring uniform Li deposition.
Meng‐Qi Zhu +7 more
wiley +1 more source
, 2002 利用有限元软件 ,采用三维线性静态方法 ,对常用的 12 7mmIEU钻杆在常见的 11种蚀坑类型下的应力分布进行了计算。计算结果显示钻杆管壁常见蚀坑的应力集中系数在 1 5～2 5之间 ,拉伸和弯曲载荷作用下蚀坑应力分布基本一致 ,弯曲载荷的分析完全可以采用拉伸载荷结果来替代。对一系列的计算结果通过最小二乘法拟合出蚀坑应力集中系数随蚀坑深度和宽度的数学关系表明 ...
刘玉标 +3 more
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Failure characteristics and control technology of “L-shaped” isolated island working face inroadway inflection point area [PDF]
Pillar free mining technology is widely used in coal mining field in China. After the formation of isolated island working face, it is affected by strong mining movement, which leads to the phenomenon of large deformation and instability of mining ...
Hui WANG +3 more
core +1 more source
Laser‐Driven Halide Exchange and High‐Resolution Multicolor Patterning of Perovskite Films
Rare Metals, EarlyView.ABSTRACT Translating the excellent properties of metal halide perovskites (MHPs) into practical flexible optoelectronic devices requires high‐resolution multicolor patterning techniques that are compatible with post‐fabrication processing. However, such a capability has remained elusive.
Shu Yang +6 more
wiley +1 more source
Shiyou jixie, 2012 针对应力集中导致石油钻杆螺纹产生疲劳裂纹，进而发生断裂失效的事故，在API接头的基础上，研究开发了一种新型钻杆螺纹接头，该新型螺纹结构主要改进之处是内螺纹锥度保持1:6不变，外螺纹锥度变为1:6.23。有限元分析结果表明，这种螺纹形式显著改善了接头上的受力分布情况，使得螺纹上应力分布更加均匀，并降低了主台肩过渡圆角处的应力集中。对样品的上扣试验结果表明，采用新型螺纹后，外螺纹接头主台肩底部的过渡圆角处应力集中情况也得到明显改善，接头整体受力分布和不同区域应力差更趋平缓 ...
焦文鸿, 高连新, 鲁喜宁
doaj
Uncertainty analysis of notch stress concentration factors for welded butt joints [PDF]
ObjectivesThis paper focuses on parametric modeling of a typical butt joint and establishes a finite element model with uncertain geometry of the weld seam, aiming to investigate the stress concentration factor Kt at the weld toe of the butt joint with ...
Chunbo ZHEN +4 more
core +1 more source
Rare Metals, EarlyView.ABSTRACT Harnessing solar energy for self‐heating presents an effective strategy to suppress surface ice formation. In this paper, we fabricated nano‐silver‐modified multilayer graphene sheets (Ag@MGs) that integrate photothermal and superhydrophobic properties for anti‐icing applications.
Yihan Zhang +7 more
wiley +1 more source
Study and application of the energy unit cutting theory and punching-blasting synergy permeability enhancement technology in tectonic anomaly areas of coal mines [PDF]
The coal seams in tectonic anomaly areas have high gas content, high geostress, low permeability, the development of tectonic coal, and uneven distribution of disaster-causing energy.
Chenghao WANG +5 more
core +1 more source
Rare Metals, EarlyView.ABSTRACT Considering the multiple challenges faced by stealth coatings in complex service environments, the development of multifunctional integrated microwave absorbing materials (MAMs) that combine efficient electromagnetic (EM) attenuation with environmental tolerance has become an urgent need. In this work, coral‐like CoNi@Void@C microparticle (MP)
Jiale Wu +8 more
wiley +1 more source
Shiyou jixie, 2015 随着服役年限的增加，导管架海洋平台结构将产生缺陷和损伤。金属磁记忆技术可实现对铁磁性金属构件内部应力集中区的检测，因此可用于对导管架平台结构的应力集中检测。在介绍金属磁记忆检测机理后，将该技术应用到导管架平台结构预检测上，并以CEP导管架平台上部组块为对象开展了应力集中检测。经与超声检测结果对比，验证了金属磁记忆技术在导管架平台结构检测的适用性。研究结果表明，金属磁记忆检测能快速准确地对平台结构进行应力集中检测，其检测结果可为平台年检计划的制定提供依据和参考。
王宁, 吕涛, 徐长航, 陈国明
doaj