Abstract
A method is developed to obtain the mode I cohesive law of elastic-plastic materials using a Double Cantilever Beam sandwich specimen loaded with pure bending moments. The approach is based on the validity of the J integral for materials having a non-linear stress-strain relationship without unloading of any material point. This assumption is not met exactly as there is a small where the material unloads. To examine the error of the method, a numerical parameter study is performed for a wide range of material and specimen parameters. The error of the method is below 16% and thus the method can be used to measure cohesive laws including their shape. (C) 2016 Elsevier Ltd. All rights reserved.
Original language | English |
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Journal | Engineering Fracture Mechanics |
Volume | 155 |
Pages (from-to) | 145-165 |
Number of pages | 21 |
ISSN | 0013-7944 |
DOIs | |
Publication status | Published - 2016 |
Keywords
- J integral
- Cohesive law
- Non-linear material
- Plasticity