A 3D Coupled Finite-Element Model for Simulating Mechanical Regain in Self-Healing Cementitious Materials
A 3D Coupled Finite-Element Model for Simulating Mechanical Regain in Self-Healing Cementitious Materials
复制标题
用于模拟自修复胶凝材料机械恢复的 3D 耦合有限元模型
DOI：
10.1061/jenmdt.emeng-6944
复制
发表时间：
2023
影响因子：
3.3
通讯作者：
A. Jefferson
中科院分区：
文献类型：
--
作者：
B. Freeman;A. Jefferson
8 这项研究提出了一种用于模拟自修复水泥材料的新 3D 耦合模型。 9 机械行为是使用损伤修复内聚区域模型来描述的，该模型是使用新的嵌入式强不连续六面体单元来实现的 10 。 11 模型的输运部分考虑了修复剂通过离散裂缝的流动，由质量平衡 12 方程控制，修复剂通量采用达西定律。 13 机械响应对修复剂传输的依赖性通过局部裂纹填充 14 函数来解释，该函数表示可用于进行修复的修复剂的量。愈合本身15由广义愈合前沿模型来描述，该模型模拟从裂纹面发出的裂纹内的愈合材料16的积累。通过考虑愈合前沿研究和对自愈水泥质 18 样本的实验测试，证明了该模型的性能 17 。这些例子考虑了使用硅酸钠溶液作为愈合剂的血管自愈水泥样本，以及使用和不使用结晶混合物的水泥样本的自愈。验证结果表明，该模型能够以良好的精度重现 21 实验观察到的行为。
8 This study presents a new 3D coupled model for simulating self-healing cementitious materials. The 9 mechanical behaviour is described using a damage-healing cohesive zone model that is implemented 10 using a new embedded strong discontinuity hexahedral element. The transport component of the 11 model considers the flow of healing agent through discrete cracks, governed by the mass balance 12 equation with Darcy’s law being emp loyed for the healing agent flux. The dependency of the 13 mechanical response on the healing agent transport is accounted for through a local crack filling 14 function that represents the amount of healing agent available to undergo healing. The healing itself 15 is described by a generalised healing front model that simulates the accumulation of healed material 16 within the crack, emanating from the crack faces. The performance of the model is demonstrated 17 through the consideration of a healing front study and experimental tests on self-healing cementitious 18 specimens. The examples consider a vascular self-healing cementitious specimen that uses a sodium 19 silicate solution as the healing agent and the autogenous healing of a cementitious specimen with and 20 without crystalline admixtures. The results of the validations show that the model is able to reproduce 21 the experimentally observed behaviour with good accuracy.
DOI：
10.1016/j.ijsolstr.2022.111601
发表时间：
2022-04-11
影响因子：
3.6
作者：
Jefferson, A. D.;Freeman, B. L.
通讯作者：
Freeman, B. L.