A sigmoidal equation for the high strain rate compression of porous metals

被引：3

作者：

Ruestes, Carlos J. ^{[1
,2
]}

Bertolino, Graciela M. ^{[3
]}

Ruda, Margarita ^{[4
]}

Bringa, Eduardo M. ^{[5
,6
]}

机构：

[1] Univ Nacl Cuyo, CONICET, RA-5500 Mendoza, Argentina

[2] Univ Nacl Cuyo, Fac Ciencias Exactas & Nat, RA-5500 Mendoza, Argentina

[3] Consejo Nacl Invest Cient & Tecn, CAB Inst Balseiro, Div Fis Metales, San Carlos De Bariloche, Rio Negro, Argentina

[4] CNEA CAB Dept Fisicoquim Mat, San Carlos De Bariloche, Rio Negro, Argentina

[5] Univ Mendoza, CONICET, RA-5500 Mendoza, Argentina

[6] Univ Mendoza, Fac Ingn, RA-5500 Mendoza, Argentina

来源：

INTERNATIONAL JOURNAL OF IMPACT ENGINEERING | 2020年 / 137卷

关键词：

Porosity; Compaction; Compression; Foams; DYNAMIC PORE-COLLAPSE; PLASTIC-DEFORMATION; VOID GROWTH; ATOMISTIC SIMULATION; MECHANICAL RESPONSE; IMPLEMENTATION; STRENGTH; TANTALUM; IMPACTS;

D O I：

10.1016/j.ijimpeng.2019.103431

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The high strain rate compression of porous materials is a problem that presents a series of difficulties to continuum-scale codes, its computational cost being a major one. Following previous contributions suggesting that compaction can be defined in terms of volumetric strain, we propose to model the compaction of porous metals by means of a sigmoidal equation. The definition requires only four parameters, each of them with a physical meaning. We tested the proposed equation against molecular dynamics simulations of high strain rate compression of closed-cell and open-cell foams, as well as micro-scale data available in the literature. The equation can be used in micro and macro-scale codes where nano-scale porosity cannot be modeled explicitly.

引用

页数：6

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