Numerical simulation of the shock spalling failure of bonded fibre–epoxy strengthening systems for metallic structures

摘要: Abstract Fibre–epoxy strengthening systems have been identified as a suitable approach for metallic structures subjected to explosive loads, increase the structural performance of existing and/or create high hybrid structures. However, experimental studies shown that when blast pressures resulting from detonation explosives, epoxy bond material may fail by shock spalling, substantially reducing system. Shock spall failure involves tension fracturing material, stress waves generated wave moves through composite structure, creating reflections and interactions at constituent boundaries. The experiments investigated limited range environments due limitations laboratory testing. present study validates numerical models experimentally observed spalling failures, then extends investigate effect broad environments, metal geometric properties, properties fibre layouts on bond. results are used provide generalised considerations design bonded fibre–epoxy structures, in form iso-damage curves damage such variety practical environments.