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QUASISTATIC DAMAGE EVOLUTION WITH SPATIAL BV-REGULARIZATION

机译:空间BV调节的准静态损伤演化

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摘要

An existence result for energetic solutions of rate-independent damage processes is established. We consider a body consisting of a physically linearly elastic material undergoing infinitesimally small deformations and partial damage. In [23] an existence result in the small strain setting was obtained under the assumption that the damage variable z satisfies z ∈ W~(1,r)(Ω) with r ∈ (1, ∞) for Ω is contained in R~d. We now cover the case r = 1. The lack of compactness in W~(1,1)(Ω) requires to do the analysis in BV(Ω). This setting allows it to consider damage variables with values in {0,1}. We show that such a brittle damage model is obtained as the Γ-limit of functional of Modica-Mortola type.
机译:建立了与速率无关的损伤过程的能量解的存在性结果。我们考虑一个由物理线性弹性材料组成的物体,该材料会经历无限小的变形和局部破坏。在[23]中,假设损伤变量z满足R∈r(1,∞)且z满足z∈W〜(1,r)(Ω)的假设,则在小应变设置下存在结果。 d。现在,我们讨论r = 1的情况。W〜(1,1)(Ω)中缺乏紧密度需要对BV(Ω)进行分析。此设置允许它考虑值为{0,1}的损坏变量。我们表明,这种脆性损伤模型是作为Modica-Mortola型功能的Γ极限获得的。

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