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A new test procedure to validate tensile dynamic mechanical properties of sheet metals and alloys in automotive crash applications

Wood, Paul and Schley, C.A. and Buckley, M.A. (2008) A new test procedure to validate tensile dynamic mechanical properties of sheet metals and alloys in automotive crash applications. In: 5th International Mobility Conference on Emerging Automotive Technologies Global and Indian Perspective, 2008-01-09 - 2008-01-11.

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Abstract

A thin walled open channel beam subjected to a 3-point bend and constant velocity boundary condition is investigated to establish its potential to validate material performance for automotive crash applications. Specifically quantitative validation of material data determined from high speed tensile testing and qualitative validation of material resistance to fracture in crash components. Open channel beams are fabricated from structural grade sheet steel and aluminium alloy and tested at quasi-static and higher speeds up to 10 m/s and in all cases, deformation develops a plastic hinge. This paper describes development of the validation test procedure, specifically design of specimen, system of measurement and boundary conditions using numerical and experimental techniques. The new test procedure will increase confidence in materials modelling and reduce the risk to introduce new advanced high strength materials into automotive crash structures.