Abstract
This paper aims to numerically investigate the dynamic response and failure mechanism of corrugated composite metal sandwich structures under slamming impact. Firstly, a slamming model is established based on Coupled Eulerian-Lagrangian (CEL) method and verified through the comparison with the published results. Subsequently, the influence of slamming velocity and deadrise angle on hydrodynamic response are studied through the monitoring of hydrodynamic force, deflection and pressure distribution. Finally, ultimate damage mode and critical failure mechanism are characterized by a VUMAT subroutine developed based on Hashin failure and Yeh delamination criterion. Results indicate that the final failure is regional collapse, accompanied with fiber rupture of bottom skin, plastic hinge of aluminum core and obvious damage of upper skin. The collapse propagates gradually from the lower 1/3 (β=5°) to the upper 1/3 (β=10°) of sandwich structure, indicating that the increase of deadrise angle is beneficial to the delay of final failure. The dominate damage mode changes from widespread matrix damage (V = 6 m/s and V = 8 m/s) to concentrated fiber fracture damage (V = 10 m/s), illustrating that the influence of slamming velocity is mainly reflected in damage degree. Stripe distributed matrix tension damage is the critical damage mode, which may led to resulting damage aggravation and core-skin delamination.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
