An engineering approach to predict mixed mode fracture of PUR foams based on ASED and micromechanical modelling

被引：50

作者：

Marsavina, Liviu ^{[1
]}

Berto, Filippo ^{[2
]}

Negru, Radu ^{[1
]}

Serban, Dan Andrei ^{[1
]}

Linul, Emanoil ^{[1
]}

机构：

[1] Univ Politehn Timisoara, Dept Mech & Strength Mat, Timisoara, Romania

[2] NTNU, Dept Mech & Ind Engn, Trondheim, Norway

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2017年 / 91卷

关键词：

ELASTIC STRESS-FIELDS; STRAIN-ENERGY; POLYURETHANE FOAMS; CELLULAR MATERIALS; BRITTLE-FRACTURE; V-NOTCHES; U-NOTCHES; TOUGHNESS; BEHAVIOR; VOLUME;

D O I：

10.1016/j.tafmec.2017.06.008

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The Averaged Strain Energy Density (ASED) criteria is applied herein to reinterpret the fracture data of PUR foams. Four type of specimens were used in fracture tests. The ASED parameters were determined based on micromechanical models. The volume control for cracked components is represented by a circle with the centre at the crack tip for all type of fracture modes. It was also demonstrated that the SED parameters obtained from pure mode I could be applied successfully for mixed modes and mode II. This approach represents an useful engineering tool for the assessment of brittle fracture of components made of cellular materials. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：148 / 154

页数：7

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