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Vol.2 , No. 2, Publication Date: May 8, 2015, Page: 22-30
 impacting the vehicle at 55kmph. The intrusion, velocity, acceleration in B-Pillar and energy absorption locally in SCM and globally are observed as the parameters of performance for the lateral crash. The model with height increased to 33mm with mass reducers, increase of strength to 30 MPa and reduction in thickness to 1.1 mm in both front and rear members has a gain of 470 gms mass in the seat cross members without compromising the performance. The model with same design combinations and thickness change to 1.2 mm with same strength as the parent has a gain of 8mm in intrusion at middle of B-Pillar. The energy absorbing capacity of the same is increased by 250 J in seat cross member and 735 J globally is the gain achieved without increasing the expenditures. As a dual benefit producing holes and slots on the side walls of the SCM is the best way for reducing the mass and as well as improving the performance.&picture=http://www.aascit.org/aascit/decorators/img/journal/916.jpg)
| [1] | M. Raghupathi, Mechanical Engineering Department, Panimalar Engineering College, Chennai, India. |
| [2] | M. Saravanan, Mechanical Engineering Department, Panimalar Engineering College, Chennai, India. |
| [3] | G. Sivakumar, Chemistry Department, Panimalar Engineering College, Chennai, India. |
This work is carried to improve the performance of the seat cross member for the lateral crash through Finite Element Techniques with the help of Beta-CAE ANSA for model build up and ESI PAM-Crash for solving and Beta-CAE Meta Post for extracting the solutions. A mesh convergence is carried out and the element of size 5mm in the components of study is observed as the converged. Having a good compromise between the computational time and the accuracy the element size is chosen in the range of 4mm - 8mm. The model is built with 1.2 million elements approximately for the analysis. Design combinations with an increase of altitude of the seat cross member in step sizes and through combinations like modifying individually either the front or rear member, modifying the both together are analyzed. Mass reducers such as holes and slots, gauge thickness and the strength are used to find out the feasibility for the mass saving in the same. The ECE Regulation 95 for lateral collision is followed for the test procedure with a MDB (Movable Deformable Barrier) impacting the vehicle at 55kmph. The intrusion, velocity, acceleration in B-Pillar and energy absorption locally in SCM and globally are observed as the parameters of performance for the lateral crash. The model with height increased to 33mm with mass reducers, increase of strength to 30 MPa and reduction in thickness to 1.1 mm in both front and rear members has a gain of 470 gms mass in the seat cross members without compromising the performance. The model with same design combinations and thickness change to 1.2 mm with same strength as the parent has a gain of 8mm in intrusion at middle of B-Pillar. The energy absorbing capacity of the same is increased by 250 J in seat cross member and 735 J globally is the gain achieved without increasing the expenditures. As a dual benefit producing holes and slots on the side walls of the SCM is the best way for reducing the mass and as well as improving the performance.
Keywords
Ls Dyna, Hypermech, CAE, Crash Worthiness, Crass Analysis
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