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初始固结角度对饱和粉质土应变发展的影响
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作者 FARHAD Jamil 曾长女 +1 位作者 马媛 sharafat ali 《岩土力学》 北大核心 2025年第2期527-538,共12页
通过主应力旋转试验,研究了黄河饱和粉质土在不同初始固结角度ζ条件下的应变发展规律。结果表明,轴向、环向和扭剪应变表现出不同的模式,显示出ζ对粉质土的力学响应影响。特别是在ζ=90°时,轴向应变在第1次加载循环中表现为压缩... 通过主应力旋转试验,研究了黄河饱和粉质土在不同初始固结角度ζ条件下的应变发展规律。结果表明,轴向、环向和扭剪应变表现出不同的模式,显示出ζ对粉质土的力学响应影响。特别是在ζ=90°时,轴向应变在第1次加载循环中表现为压缩行为,而环向应变则表现为拉伸行为。不同初始固结角度引起的各向异性在ζ=90°和ζ=60°附近开始显现。不同ζ值的应变波动趋势趋于稳定,其中ζ=90°和ζ=75°表现出相似性;而当ζ=45°时,表现出最大的波动性和应变幅值。除ζ=90°和ζ=60°外,大多数ζ角下的扭剪应变表现出相似性。体积应变突显了固结角度对土体各向异性特征的显著影响。随着初始固结角的增加,滞回曲线向左移动,表现出循环蠕变特性;在ζ=60°时,剪切应变几乎可以忽略。随着循环周期的增加,滞回环收缩,表现出剪切刚度的持续增强并最终稳定。该研究揭示了初始固结角度对饱和粉质土的力学特性的影响。 展开更多
关键词 空心圆柱扭剪仪 主应力轴旋转 初始固结角度 粉质土 应力路径
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Attitude Analysis in Process Conflict for C919 Aircraft Manufacturing 被引量:4
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作者 Xu Haiyan Xu Peng sharafat ali 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2017年第2期115-124,共10页
Based on the option prioritization in graph model for conflict resolution of two decision makers(DMs),new logical and matrix representations of four stability concepts for DMs′attitude are proposed.The logical repres... Based on the option prioritization in graph model for conflict resolution of two decision makers(DMs),new logical and matrix representations of four stability concepts for DMs′attitude are proposed.The logical representation of attitude is defined,and converted to the matrix form in order to develop a decision support system(DSS)efficiently.Compared with existing definitions of DMs′attitude based on states,the proposed definitions of attitude based on options are convenient and more effective to generate preferences since that of states can be significantly larger than that of options in a large conflict.In addition,it is easier to obtain the information of the prioritization of option statements than to obtain preference of states for users.The proposed representations are applied to the process conflict during aircraft manufacturing to demonstrate the efficiency of the new approach. 展开更多
关键词 graph model for conflict resolution ATTITUDES option prioritization process conflict for aircraft manufacturing
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