Meso-scale computational modeling of the plastic-damage response of cementitious composites
Meso-scale computational modeling of the plastic-damage response of cementitious composites
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DOI：
10.1016/j.cemconres.2010.12.002
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发表时间：
2011-03-01
影响因子：
11.4
通讯作者：
Abu Al-Rub, Rashid K.
中科院分区：
文献类型：
--
作者：
Kim, Sun-Myung;Abu Al-Rub, Rashid K.
混凝土被认为是一种三相复合材料：砂浆基质、骨料和界面传递区(ITZ)。为了研究各阶段对混凝土强度和损伤响应的贡献，基于塑性-损伤耦合模型，进行了二维和三维细观模拟。骨料被模拟为线弹性材料，而砂浆基质和ITZ采用具有不同拉伸和压缩力学行为的塑性-损伤耦合模型。将骨料的形状、分布和体积分数作为模拟变量。并对界面层厚度、界面层和砂浆强度的影响进行了评价。结果表明，混凝土的性能仅取决于骨料的分布和砂浆基质的强度，而取决于骨料的形状、尺寸和体积分数，以及界面的厚度和强度。(C)2010爱思唯尔有限公司。保留所有权利。
Concrete is considered as a 3-phase composite material; mortar matrix, aggregates, and interfacial transmission zone (ITZ). In order to investigate the contribution of each phase to the strength and damage response of concrete, 2-D and 3-D meso-scale simulations based on a coupled plasticity-damage model are carried out. The aggregates are modeled as a linear-elastic material, whereas the mortar matrix and ITZ are modeled using a coupled plasticity-damage model with different tensile and compressive mechanical behavior. Aggregate shape, distribution, and volume fraction are considered as simulated variables. The effect of the ITZ thickness and the strength of the ITZ and mortar matrix are also evaluated. It is shown that the behavior of concrete is merely dependent on the aggregate distribution and the strength of the mortar matrix, but dependent on aggregate shape, size, and volume fraction, and the thickness and strength of the ITZ. (C) 2010 Elsevier Ltd. All rights reserved.