A thermomechanical crystal plasticity constitutive model for ultrasonic consolidation

We present a micromechanics-based thermomechanical constitutive model to simulate the ultrasonic consolidation process. Model parameters are calibrated using an inverse modeling approach. A comparison of the simulated response and experimental results for uniaxial tests validate and verify the appropriateness of the proposed model. Moreover, simulation results of polycrystalline aluminum using the identified crystal plasticity based material parameters are compared qualitatively with the electron back scattering diffraction (EBSD) results reported in the literature. The validated constitutive model is then used to simulate the ultrasonic consolidation process at sub-micron scale where an effort is exerted to quantify the underlying micromechanisms involved during the ultrasonic consolidation process.

► We present a micromechanics based thermomechanical constitutive model to simulate the ultrasonic consolidation process. ► Model takes into account the single crystralline deformation along with thermal and acoustic softening in the material. ► Simulated response at microstructural level has been compared with the EBSD data showing a good agreement. ► An effort has been made to quantify the underlying micromechanisms involved during the ultrasonic consolidation process.