Shape optimization of bumper beams under high-velocity impact loads

Tanlak, Niyazi; Sonmez, Fazıl O.; Senaltun, Mahmut

doi:10.1016/j.engstruct.2015.03.046

Cited by 48 publications

(12 citation statements)

References 44 publications

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“…Heo et al (2013) presented shape optimization of lower control arm considering multi-disciplinary constraint conditions, which are stiffness, strength and durability [17]. Tanlak et al (2015) investigated the shape optimization of the bumper beam to maximize the crashworthiness of the beam. They indicated that significant improvement in the crashworthiness of the bumper beam currently in-use and also resistance to low-velocity impact improved [18].…”

Section: Introductionmentioning

confidence: 99%

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A novel design procedure for tractor clutch fingers by using optimization and response surface methods

et al. 2016

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This paper presents a methodology for re-designing a failed tractor transmission component subjected to cyclic loading. Unlike other vehicles, tractors cope with tough working conditions. Thus, it is necessary to re-design components by using modern optimization techniques. To extend their service life, we present a design methodology for a failed tractor clutch power take-off finger. The finger was completely re-designed using topology and shape optimization approach. Stress-life based fatigue analyses were performed. Shape optimization and response surface methodology were conducted to obtain optimum dimensions of the finger. Two design parameters were selected for the design of experiment method and 15 cases were analyzed. By using design of the experiment method, three responses were obtained: Maximum stresses, mass, and displacement depending on the selected the design parameters. After solving the optimization problem, we achieved a maximum stress and mass reduction of 14% and 6%, respectively. The stiffness was improved up to 31.6% compared to the initial design.

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Section: Introductionmentioning

confidence: 99%

“…Tanlak et al (2015) investigated the shape optimization of the bumper beam to maximize the crashworthiness of the beam. They indicated that significant improvement in the crashworthiness of the bumper beam currently in-use and also resistance to low-velocity impact improved [18].…”

Section: Introductionmentioning

confidence: 99%

A novel design procedure for tractor clutch fingers by using optimization and response surface methods

et al. 2016

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“…Tanlak et al 16 performed a geometrical optimization for the box-shaped bumper beams. The crash phenomenon was simulated in standard tests, in which the vehicle hit a deformable barrier with an offset of 40% at 64 km/h.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on the crashworthiness evaluation of an intercity coach under frontal impact conditions

Güler

Cerit

Mert

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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In this study, the energy absorption capacity of a front body of a bus during a frontal crash was investigated. The strength of the bus structure was examined by considering the ECE-R29 European regulation requirements. The nonlinear explicit finite element code LS-DYNA was used for the crash analyses. First, the baseline bus structures without any improvements were analyzed and the weak parts of the front end structure of the bus body were examined. Experimental tests are conducted to validate the finite element model. In the second stage, the bus structure was redesigned in order to strengthen the frontal body. Finally, the redesigned bus structure was compared with the baseline model to meet the requirements for ECE-R29. In addition to the redesign performed on the body, energy absorption capacity was increased by additional energy absorbers employed in the front of bus structure. This study experimentally and numerically investigated the energy absorption characteristics of a steering wheel armature in contact with a deformable mannequin during a crash. Variations in the location of impact on the armature, armature orientation, and mannequin were investigated to determine the effects of the energy absorption characteristics of the two contacting entities.

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“…There exist many studies on shape design of bumper beams to increase their crash performance [27][28][29][30][31][32][33][34]. These studies show that energy-absorbing capability of a bumper can be improved by using different shapes and optimizing them.…”

Section: Introductionmentioning

confidence: 99%

Multi-fidelity crashworthiness optimization of a bus bumper system under frontal impact

Acar

Yılmaz

Güler

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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In this study, crashworthiness of a bus bumper system with a special honeycomb beam is optimized under impact loading using a multi-fidelity optimization approach. The crash performance of the bumper system is evaluated using two metrics: crush force efficiency (CFE) and specific energy absorption (SEA). An optimization with aggregated objectives is performed to seek for an optimum bumper design. Optimum values of the crashbox length, honeycomb wall angle and honeycomb wall thickness are obtained to maximize composite objective function that provides a compromise between these two metrics. Commercial finite element software LS-DYNA is used to compute CFE and SEA values. Multi-fidelity modeling is used to combine data of low-fidelity model at all training points with high-fidelity data at some randomly selected training points to obtain accurate response predictions in less computational time. It is found that multi-fidelity optimization can reduce the computational cost by 33% with only 2% smaller composite objective function value compared to the high-fidelity optimization alternative.

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Shape optimization of bumper beams under high-velocity impact loads

Cited by 48 publications

References 44 publications

A novel design procedure for tractor clutch fingers by using optimization and response surface methods

A novel design procedure for tractor clutch fingers by using optimization and response surface methods

Experimental and numerical study on the crashworthiness evaluation of an intercity coach under frontal impact conditions

Multi-fidelity crashworthiness optimization of a bus bumper system under frontal impact

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