EFFECTS OF STRESS HISTORY ON DEFORMATION OF SAND

EFFECTS OF STRESS HISTORY ON DEFORMATION OF SAND
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应力历史对砂变形的影响

DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
G. A. Leonards
G. A. Leonards
中科院分区：
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文献类型：
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作者：
J. Lambrechts;G. A. Leonards

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由预应力引起的预应变，没有残余的侧向应力，被发现增加变形阻力增量施加轴向载荷的数量级。预应力试样的载荷-变形行为从较硬的、基本上为弹性的再加载模式变为主要为塑性的、类似于正常固结状态的模式时的应力水平取决于预应力（或预应变）的大小。初始模量和围压的各向异性固结，非预应力样品之间的关系被发现基本上是线性的。由于预应力的应力-应变响应的变化的评价也试图使用一个模型锥形应变计。
The prestraining induced by prestressing, without residual lateral stresses, was found to increase the deformation resistance to incrementally applied axial load by an order of magnitude. The stress level at which a prestressed sample's load-deformation behavior changed from the stiffer, essentially elastic reloading mode to that which was predominantly plastic and resembled the normally consolidated state depended upon the magnitude of the prestress (or prestrain). The relationship between initial modulus and confining pressure for anisotropically consolidated, non-prestressed samples was found to be essentially linear. Evaluation of the changes in stress-strain response due to prestressing was also attempted using a model cone penetrometer.