RELIABILITY APPROACH FOR THE BEHAVIOUR OF ADHESIVELY-BONDED ASSEMBLIES IN MARINE APPLICATIONS

摘要

In order to reduce the time and cost of mechanical design nonlinearities must be included when simulating the behaviour of a structure; this leads to nonlinear finite element simulations in the case of industrial structures. Moreover we have to take into account the random and temporal character of loads and other parameters. The objective of this paper is to propose a time variant reliability approach for adhesively bonded assemblies in marine application. The proposed strategy requires the combination of time variant reliability and non linear finite element analysis. This study takes into account the random and temporal character of material behaviour, environmental conditions and loads. To demonstrate the feasibility and the difficulties of such a combination, an example focusing on adhesively-bonded assemblies is proposed. In order to limit numerical costs, cohesive zone elements are used to model the non linear behaviour of the adhesive joint. Results from the PHI2 method and comparison between two variants of this time variant reliability method are presented.