Micro-mechanical modeling of the bonded joint CDNT test for nano toughened epoxy adhesives

摘要

Micro-mechanical numerical model based on RVE approach is build to simulate J-CDNT test for epoxy adhesive modified with 200 nm CSR particles. Comprehensive analysis of particle debonding/caviation probability is performed which show that 200 nm CSR particles will probably cavitate. Although experimentally obtained stress-strain curve of J-CDNT test is very well predicted, still there is space for improvement of the numerical model by using more realistic boundary conditions at the RVE boundaries as well as particle debonding or cavitation from the matrix. In the next stage of this project it will be investigated if more physical results will be obtained by using periodic RVE with periodic boundary conditions. After that simulations will be performed for different CSR particles volume fractions.