The investigation of a contact and element-based approach for Cohesive zone modelling in the simulation of Delamination propagation
2022-01-0292
03/29/2022
- Content
- The CAE industry always moves towards new ways to improve the productivity, efficiency and to reduce the solution times. Conventional method of Cohesive Zone Modelling has drawback of higher computation and modelling time. Due to this problem, sometimes Engineers need to avoid simulations and rely only on some sort of approximation of crack from previous designs. This approximation can lead to either product failure or overdesign of the product. A new approach is discussed in this paper to simulate crack initiation and propagation with Cohesive Zone Modelling. Conventional method uses Cohesive zone modelling with Hex or Penta elements by assigning material with cohesive properties, which increases computation and modelling time. The new approach models Cohesive zone as contact between two bodies, thus eliminating the need to use cohesive elements which will essentially reduce the computation time as well as modelling time. This approach uses Damage model method which allows modelling of interaction between two surfaces based on available experimental data. This approach will yield output in terms of Damage initiation, Damage evolution, Cohesive opening and its status. The Validation of model is done with the double cantilever beam (DCB) test. The specimen is made with two panels and flaw is introduced at their interaction. Strain life approach is used to calculate fatigue damage under testing cycles. The result is compared with the experimental data
- Citation
- Dhangar, V., Hosmath, A., and Salunkhe, P., "The investigation of a contact and element-based approach for Cohesive zone modelling in the simulation of Delamination propagation," SAE Technical Paper 2022-01-0292, 2022, .