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基于卷积神经网络的夹层玻璃开裂后拉伸性能快速评估方法
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作者 尹俊熙 彭沈楠 +1 位作者 王星尔 杨健 《硅酸盐通报》 CAS 2024年第12期4588-4596,共9页
夹层玻璃开裂后的承载性能对持续风灾或爆炸时建筑玻璃结构安全性非常重要。玻璃裂纹形态作为开裂后性能的关键影响因素,对夹层玻璃的拉伸硬化效应和局部失效触发有着重要作用。对采用离子性中间层(SG)的钢化夹层玻璃进行碎裂试验及碎... 夹层玻璃开裂后的承载性能对持续风灾或爆炸时建筑玻璃结构安全性非常重要。玻璃裂纹形态作为开裂后性能的关键影响因素,对夹层玻璃的拉伸硬化效应和局部失效触发有着重要作用。对采用离子性中间层(SG)的钢化夹层玻璃进行碎裂试验及碎裂后单轴拉伸试验,获取图形和力学性能的试验数据集,并和精细有限元模型校核,确定裂纹形态对应的碎片密度、最小最近邻距离、有效粘结系数等关键参数。随后,建立由表面应力调控裂纹形态的夹层玻璃开裂后有限元模型批量化生成方法,基于维诺(Voronoi)形态近似来扩充模拟数据集。采用卷积神经网络方法,基于裂纹形态图像识别训练,得到具有良好精度的夹层玻璃开裂后等效拉伸性能快速评估方法。 展开更多
关键词 夹层玻璃 sg中间层 开裂后性能 裂纹形态 快速评估方法 卷积神经网络
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Spin-glass behavior in the competing CoCrGaO_(4)cubic spinel system
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作者 Jiyu Hu Jiangli Ni +1 位作者 Zhenfa Zi Chaocheng Liu 《Nano Research》 SCIE EI 2025年第1期501-507,共7页
Spin glasses(SGs),generally defined as disordered systems with randomized competing interactions,are widely investigated complex phenomena.Discovering the ground states of spin glasses is crucial for understanding the... Spin glasses(SGs),generally defined as disordered systems with randomized competing interactions,are widely investigated complex phenomena.Discovering the ground states of spin glasses is crucial for understanding the nature of disordered magnets and many other physical manifestations,while also helping to solve some hard combinatorial optimization problems across multiple disciplines.However,the intrinsic cause of SG has always been elusive,especially in spinel oxide systems.Herein,we report the SG behavior observed in the cubic spinel oxides CoCrGaO_(4),and provide a comprehensive understanding of its intrinsic source.Magnetic results indicate a frustrated state under multi-magnetic competition,and the features of SG are confirmed by susceptibility tests.The fitting parameters ofτ0,T0,and zv of isothermal remanent magnetization further reveal the relaxation behavior and strong spin frustration.Furthermore,the varying exchange coupling under different temperatures and magnetic fields is unveiled,which should be responsible for the disordered state.Our studies unravel the underlying mechanism responsible for doping-induced magnetic frustration and introduce CoCrGaO_(4)as a potential platform for investigating spin glass behavior,thereby advancing fundamental research on frustrated magnetism within the spinel system. 展开更多
关键词 spin glass(sg) magnetic frustration magnetic competition spinel ferrites
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