Abstract
A method is developed to extract the fracture resistance and mode I cohesive law of nonlinear elastic-plastic materials using a Double Cantilever Beam (DCB) sandwich specimen loaded with pure bending moments. The method is based on the J integral which is valid for materials having a non-linear stress-strain relationship as long as there is no unloading at any material point. A numerical parameter study is performed for a wide range of material and specimen parameters to examine the accuracy of the method. In the range examined, the error of the method is less than 11% and thus it can be used to measure the fracture resistance experimentally and determine the mode I cohesive law including its shape.
| Original language | English |
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| Title of host publication | Proceedings of the 16th European Conference on Composite Materials, ECCM 2014 |
| Publication date | 2014 |
| Publication status | Published - 2014 |
| Event | 16th European Conference on Composite Materials - Seville, Spain Duration: 22 Jun 2014 → 26 Jun 2014 Conference number: 16 http://www.escm.eu.org/eccm16/index.html |
Conference
| Conference | 16th European Conference on Composite Materials |
|---|---|
| Number | 16 |
| Country/Territory | Spain |
| City | Seville |
| Period | 22/06/2014 → 26/06/2014 |
| Internet address |
Keywords
- Ceramics and Composites
- Cohesive law
- J integral
- Non-linear material
- Plasticity
- Cantilever beams
- Elastoplasticity
- Fracture
- Fracture toughness
- Stress-strain curves
- Unloading
- Cohesive laws
- Double cantilever beam sandwiches
- Non-linear stress-strain
- Nonlinear elastic plastics
- Nonlinear materials
- Numerical parameters
- Numerical methods