Nonuniformities imposed by simple shear apparatus
Nonuniformities imposed by simple shear apparatus
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简单剪切装置造成的不均匀性
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
M. Budhu
中科院分区：
文献类型：
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作者：
M. Budhu
使用了两种类型的简单剪切仪--一种是由剑桥大学开发的精密仪器，可以接受长方体试件；另一种是由挪威岩土研究所(NGI)开发的，它非常简单，可以接受圆柱形试件，其中只测量施加在试件水平表面的剪切和法向载荷。剑桥大学和NGI型简单剪力仪的排水单调和重复剪切应变试验结果表明，应力和应变的不均匀在单调加载中发展，并随着剪切应变循环次数的增加而增加。剑桥式装置的刚性边界对试件施加了明确的简单剪切构型。挪威岩土学会类型仪器的灵活边界提供了较少的约束，允许发生平面外移动。同样制备的砂样在两种装置中的特征响应是不同的，这是因为砂样在两种装置中的特征响应不同。
Two types of simple shear apparatus are in use — one developed at Cambridge, which is elaborately instrumented and accepts a cuboidal sample, and the other developed at the Norwegian Geotechnical Institute (NGI), which is attractively simple and accepts a cylindrical sample, and in which only shear and normal loads applied to the horizontal surface of the sample are measured.Results of drained monotonic and repeated shear straining tests in the Cambridge and an NGI type simple shear apparatus, both elaborately instrumented, show that nonuniformities of stress and strain develop in monotonic loading and grow with the number of cycles of shear straining. The rigid boundaries of the Cambridge type apparatus impose a definite simple shear configuration to the sample. The flexible boundary of the Norwegian Geotechnical Institute type apparatus provides less restraint allowing out-of-plane movements to occur. The characteristic responses of similarly prepared sand samples are different in the two apparatus beca...