Design optimization of a B-pillar for crashworthiness of vehicle side impact

In this study, Hypermesh and Catia V5 software were adopted for finite element analysis (FEA) of a vehicle B-pillar. The design objectives were to optimise the B-Pillar such that the maximum displacement, weight, and maximum stress value of B-Pillar is minimised without compromising its yield strength and impact resistant properties. This is significant for the improvement of a vehicle’s crashworthiness and ensuring the safety of passenger(s) during road accidents. This study initially analysed a given B-pillar design after being subjected to an even force of 140kN. The result produced von Mises stress of 1646MPa and deflection of 5.9mm. To ensure that EuroCAP directives were met, the BPillar was reinforced by adding extra steel plates to its inner surface and applying seam welding to ascertain their fusion and analysed using the same force of 140kN. Analysis of the reinforced B-Pillar design produced maximum von Mises stress of 673MPa with a maximum displacement value of 2.39mm. The optimised B-Pillar design was reinforced with 1.7kg steel plate with the overall mass of the B-Pillar amounting to 4.2kg of the total design compared to the original B-Pillar which had a total mass of 6kg. The optimised BPillar possessed less weight beside capable of resisting a force of 140kN with von Mises stress and displacement rate lower than the original B-Pillar. Thus, this indicates improvement in the tensile strength, stiffness, and impact resistant behaviour against collision forces by acting sideward on vehicles during road accidents. This can save such vehicles and passengers from severe damage that may result in loss of lives and properties. Hence, B-Pillar must be designed following the existing standards and tested before installation on vehicles to avoid unforeseen catastrophes.

[1]  Masoud Rais-Rohani,et al.  Crashworthiness optimisation of vehicle structures with magnesium alloy parts , 2012 .

[2]  J. Reddy An introduction to the finite element method , 1989 .

[3]  Santosh Reddy Modeling and analysis of a composite B-Pillar for side-impact protection of occupants in a sedan , 2007 .

[4]  A. A. Faieza,et al.  Effect of Material on Crashworthiness for Side Doors and B Pillar Subjected to Euro NCAP Side Impact Crash Test , 2013 .

[5]  Yahaya Ahmad,et al.  Development of Mobile Deformable Barrier for Side Impact Crashworthiness Evaluation in ASEAN New Car Assessment Programme (ASEAN NCAP) , 2014 .

[6]  Aniekan Essienubong Ikpe,et al.  Design and Reinforcement of a B-Pillar for Occupants Safety in Conventional Vehicle Applications , 2017 .

[7]  M. Kamal,et al.  An Integrated Approach For Fatigue Life Estimation Based On Continuum Mechanics Theory And Genetic Algorithm , 2015 .

[9]  Chi Wang,et al.  Engineering with rubber - how to design rubber components - 2nd edition , 1992 .

[10]  David P. Thambiratnam,et al.  Inclusion of Tapered Tubes in Enhancing the Crash Performance of Automotive Frontal Structures , 2013 .

[11]  M. Z. Omar,et al.  Energy absorption capability and deformation of laminated panels for armoured vehicle materials , 2016 .

[12]  James Njuguna The application of energy-absorbing structures on side impact protection systems , 2011, Int. J. Comput. Appl. Technol..

[13]  M. R. Osman,et al.  A systemic analysis of the usage of safety items among Malaysian private vehicle users , 2016 .

[14]  Cv Clemens Verhoosel,et al.  Non-Linear Finite Element Analysis of Solids and Structures , 1991 .

[15]  Joseph M. Nolan,et al.  INSURANCE INSTITUTE FOR HIGHWAY SAFETY SIDE IMPACT CRASHWORTHINESS EVALUATION PROGRAM: IMPACT CONFIGURATION AND RATIONALE , 2003 .

[16]  A. A. Faieza,et al.  Crashworthiness Determination of Side Doors and B Pillar of a Vehicle Subjected to Pole Side Impact , 2014 .

[17]  J. Keith Nisbett,et al.  Shigley's Mechanical Engineering Design , 1983 .

[18]  Wei Gao Qiao,et al.  Simulation and Optimization of B-Pillar Crashworthiness Based on Virtual Test , 2014 .

[19]  M. Mohammadi,et al.  BUCKLING ANALYSIS OF THIN FUNCTIONALLY GRADED RECTANGULAR PLATES WITH TWO OPPOSITE EDGES SIMPLY SUPPORTED , 2010 .

[20]  F. Leckie,et al.  Strength and Stiffness of Engineering Systems , 2009 .

[21]  M. RahmanM.,et al.  Multiaxial fatigue behavior of cylinder head for a free piston linear engine , 2009 .

[22]  Ahmed Elmarakbi,et al.  Integration of Vehicle Dynamics Control Systems with an Extendable Bumper for Collision Mitigation , 2015 .

[23]  M. Kamal,et al.  FINITE ELEMENT-BASED FATIGUE BEHAVIOUR OF SPRINGS IN AUTOMOBILE SUSPENSION , 2014 .

[24]  P. Wriggers Nonlinear finite element analysis of solids and structures , 1998 .

[25]  Zaini Ahmad,et al.  Energy Absorption Performance of a Rain Forest Vehicle Under Frontal Impact , 2014 .