Evaluation of spotweld failure model in Radioss to roof resistance test (FMVSS216)

Mohd Rehan, Mohammad Daniel (2021) Evaluation of spotweld failure model in Radioss to roof resistance test (FMVSS216). Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Over the past decade, reducing the severity of roof crash impact collisions has been an emerging area of research by a variety of organizations and research communities. The roof crash simulation normally does not use Altair Radioss as the programme medium. This is because a crash test organisations such as the National Highway Traffic Safety Administration (NHTSA) are using an older applications software such as Ls-Dyna to run the simulation and plus, the Altair Radioss was still very new in the crash simulation study. The main purpose of this research study is to find the right spotweld failure model behavior to replace the spotweld failure that has been allocated in roof crash simulation in RADIOSS. This objective include to simulate the spotweld failure model comparable to the actual roof resistance test according to FMVSS216 within 20% of error. It also to compare strength to weight ratio(SWR) result between current Finite Element model and updated spotweld failure model. In this research in particular, a test and simulation were carried out in order to evaluate the Finite Element Model (FEM) for car roof crash simulation. This simulation is to find the right spotweld failure model for get close result to actual test. This simulation was done by using HYPERCRASH and HYPERMESH software. The spotweld failure that was used was spotweld rupture in spotweld failure model because using this spotweld failure the result SWR was 4.91, close to actual test which is 19.76% of percentage error. This spotweld failure model just apply to the critical part of the roof such as B-pillar, A-pillar and roof. Using this type of analysis can reduce cost for the industry of automotive because they just used the simulation for the get close to actual test.

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