How to Make Cars
Safe and Light?
Virtual recreation of catastrophic crash can help understand how an automobile’s structural components behave under extreme loading situations.
Materials typically fail differently depending on the loading it is subjected to. To make the design safe and light, it is essential to include the ‘true’ strength of the material until after failure (post-buckling). This ensures that the material is used to its fullest extent and the structure/component’s optimal weight.
It is challenging to predict cracks around holes, edges, and welds in ultra-high-strength-steel (UHSS) during crash conditions. Using plastic strain from standard tensile tests or a forming limit diagram (FLD) as an indicator of failure is not adequate. The solution is very dependent on the element size and only valid for monotonic loading. Also, the maximum plastic strain at failure is dependent on the element size and thickness of the samples.