Methodological Approach to Investigate the Behavior of Structures under Dynamic Loading Using the Multiple Criteria Decision Making Method
The main objective of this article is to develop a support approach for designers in the concept phase of the design process. In this paper, two different structures with metal, composite and hybrid material are investigated under dynamic loading with multiple strain rates. The optimum choice of material and structural combination is found by a methodological approach using a Multi Criteria Decision Making Method (MCDM) It uses a step by step procedure in evaluating the significance of each criterion and ranks the different alternatives. This method is applied to solve various problems in the field of economics, engineering, management, cf. [1] [2] [3] [4] In this article, COPRAS is used to rank different material and structural combinations. Cylindrical and rectangular structures are investigated under axial and 3 point bending load. Moreover, three different constellations of material widen the comparison; they are steel and aluminum, composite material with carbon fiber and thermoplastic matrix and hybrid material, with a combination of composite and metal. The output parameters from the simulation, such as energy absorption and force, are further mathematically converted to specific energy absorption (SEA) crash force efficiency (CFE) and load non uniformity (LU) PAM Crash is used as a solver for simulation.