Discrete mechanical models of concrete fracture
Discrete mechanical models of concrete fracture
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DOI：
10.1016/j.engfracmech.2021.108030
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发表时间：
2021-10-09
影响因子：
5.4
通讯作者：
Nagai, Kohei
中科院分区：
文献类型：
--
作者：
Bolander, John E.;Elias, Jan;Nagai, Kohei
固体的离散模型在很大程度上是由材料结构的不连续和异质性质及其在载荷作用下的破坏所激发的。离散模型的功能在过去几十年中不断发展，为研究材料结构-性能关系提供了新颖的方法。然而，缺乏对离散模型的效用和缺点的了解限制了其进一步的发展和应用。本文回顾了用于模拟岩土材料（特别是混凝土材料）力学行为的离散方法的相关特征。离散模型根据其形式和在存在大规模材料异质性的情况下表示弹性和断裂行为的能力进行分类。材料域的离散化在这方面发挥着重要作用。重点放在基于粒子的晶格模型上。概述了引入增强成分的各种策略的相对优点，这对于许多应用来说是必不可少的。重点介绍了最新进展，包括使用离散模型进行耦合多场分析。结论总结了离散方法的优点。
Discrete models of solids have been motivated, in large part, by the discontinuous and heterogeneous nature of material structure and its breakdown under loading. The capabilities of discrete models have evolved over the past several decades, offering novel means for investigating material structure-property relationships. However, lack of understanding of both the utilities and disadvantages of discrete models limits their further development and applications. This paper reviews relevant features of discrete approaches applied to modeling the mechanical behavior of geomaterials, concrete materials in particular. The discrete models are classified according to their form and abilities to represent elastic and fracture behaviors in the presence of large-scale material heterogeneity. Discretization of the material domain plays a large role in this respect. Emphasis is placed on particle-based lattice models. The relative merits of various strategies for introducing reinforcing components, which are essential for many applications, are outlined. Recent advances are highlighted, including the use of discrete models for coupled, multi-field analysis. The merits of discrete approaches are summarized in the conclusions.