Nonlocal plasticity-based damage modeling in quasi-brittle materials using an isogeometric approach
نویسندگان
چکیده
Purpose This paper aims to present a nonlocal gradient plasticity damage model demonstrate the crack pattern of body, in an elastic and plastic state, terms law. The main objective this is reconsider theory by including material in-homogeneity caused plasticity. nature strain field provides regularization overcome analytical computational problems induced softening constitutive laws. Such approach requires C1 continuous approximation. achieved using isogeometric approximation (IGA). Numerical examples one two dimensions are presented. Design/methodology/approach In work, authors propose model. An additive decomposition strains inelastic or part considered. To obtain stable damage, higher order considered for integral equation, which obtained Taylor series expansion local around point under consideration. higher-order continuity nonuniform rational B-splines (NURBS) functions used analysis adopted here implement numerical scheme. validity proposed model, Findings able predict accurate manner. results mesh independent. add especially type materials. consideration nonlocality more meaningful physics damage. use IGA framework NURBS basis approximations variables. Research limitations/implications method can be extended 3D. does not consider effect temperature dissipation energy due temperature. needs implemented real practical compare with experimental work. ongoing Practical implications models suitable predicting quasi brittle theories allows capture deformations accurately. Social Originality/value work includes formulation implementation discretization, novel contribution paper. implicit enhancement strain. During deformations, tensor partitioning distinct potential surface failure criterion both models. adds
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ژورنال
عنوان ژورنال: Engineering Computations
سال: 2021
ISSN: ['0264-4401', '1758-7077']
DOI: https://doi.org/10.1108/ec-12-2019-0562