Modelling of Ductile Fracture of Strain-hardening Cement-based Composites - Novel Approaches Based on Microplane and Phase-field Method

Modelling of Ductile Fracture of Strain-hardening Cement-based Composites - Novel Approaches Based on Microplane and Phase-field Method
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应变硬化水泥基复合材料的延性断裂建模 - 基于微平面和相场方法的新方法

DOI:
10.1007/978-3-030-34851-9_10
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Kaliske M.
Kaliske M.
中科院分区:
--
文献类型:
--
作者:
Steinke C;Zreid I;Kaliske M.

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应变硬化水泥基复合材料(SHCC)是指由细颗粒水泥基基体和短的、随机取向的聚合物微纤维组成的一类复合材料。在拉伸载荷下,初始的线性弹性阶段导致在基体中形成第一裂纹,该裂纹由微纤维桥接并表现出非常有限的裂纹口开口。附加拉伸载荷揭示了在相对大的应变下承载能力的进一步增加和由于附加微裂纹的形成而产生的高能量吸收能力,极限载荷由桥接临界裂纹的纤维的拔出或断裂引起的结构失效决定。一种新的方法模型的复合材料的行为与各向同性硬化的塑性制剂,这是耦合到一个numericalapproximation的损伤或韧性断裂,以考虑拔出或断裂的纤维,分别。
Strain-hardening cement-based composites (SHCCs) denote a class ofcomposite materials, which consist of a finely grained cementitious matrix and short,randomly orientated polymer micro fibers. At tensile loading, an initial linear-elasticstage results in the formation of a first crack in the matrix, that is bridged by microfibers and exhibit a very limited crack mouth opening. Additional tensile loadingreveals further increase in the load-bearing capacity at relatively large strains anda high energy absorption capacity due to the formation of additional micro cracks.The ultimate load is governed by structural failure due to pull out or rupture of thefibers bridging a critical crack. A novel approach models the composite behaviorby a plasticity formulation with isotropic hardening, that is coupled to a numericalapproximation for damage or ductile fracture to account for pull out or rupture offibers, respectively.
纤维类型对应变硬化水泥基复合材料 (SHCC) 冲击载荷下拉伸行为的影响
DOI: --
发表时间: 2017
期刊:
影响因子: --
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