Method for Designing and Evaluating Pedestrian Protection Energy Absorbers for Various Car Geometries

Nanda, Alok; Surisetty, Gopikrishna; Mohapatra, Subhransu Sekhar; Ad, Shaleena; Shuler, Stephen; Mooijman, Frank

doi:10.4271/2004-01-1702

Cited by 5 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If the evaluation using the FE model indicates that the vehicle bumper does not meet the regulation requirement, design of experiments (DOE) and optimization will be conducted. [3][4][5][6][7] The DOE process usually requires a large number of legform-to-bumper impact simulations, which may have a long turnaround design time if using the detailed model.…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10] In the meantime, simplified FE bumper models were also developed to conduct sensitivity studies of the design variables. 3,4 Another type of simplified bumper model is the so-called multi-body parametric bumper model, built using MADYMO software, to carry out the DOE and optimization studies. 7,[11][12][13] A spring bumper system model was also used as a design tool to optimize the vehicle's front structure, 5 and a detailed response surface was generated on the basis of a DOE study.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A bumper model with dynamic contact stiffness for simulations of pedestrian legform impacts

Huang

Xia

Nie

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

Car-to-pedestrian accidents have become a global problem, and car manufacturers have made great efforts to redesign the car for pedestrian protection. For fast computer simulations of pedestrian legform-to-bumper impacts, which are usually needed for the large design-of-experiments matrix, quite a number of simplified bumper models have been built to represent detailed finite element models adopted from full-vehicle models. However, it has been a difficult balance between simplifying the structure to achieve fast computation and keeping the essential characteristics to obtain valid results. This paper documents a development and validation of a simplified bumper system model. The spring stiffness properties are determined by considering the loading rate effect and the local deformation effect of the vehicle’s front-end structure, which is essential for legform impact simulations. To validate the simplified bumper system model, the simulation results from the simplified bumper system model and from a detailed bumper system model are compared. This study also indicates that, to improve the responses of the legform bending and shear, the vehicle’s bumper should be modelled as two separate spring systems since the impact interaction is within the knee joint centre of the legform.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A bumper model with dynamic contact stiffness for simulations of pedestrian legform impacts

Huang

Xia

Nie

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

Current Trends in Bumper Design for Pedestrian Impact

Schuster¹

2006

SAE Technical Paper Series

View full text Add to dashboard Cite

Worldwide, the pace of development in pedestrian countermeasures is increasing rapidly. To better understand the state of the art in bumper design for pedestrian impact, a survey of literature and patents has been performed. Two general approaches to reducing the severity of pedestrian lower limb impacts were identified: (a) Provide cushioning and support of the lower limb with a bumper and a new lower stiffener, or (b) Use the bumper as a platform for impact sensors and exterior airbags. This study focused on the first approach. Excluding bumper sensors, airbags, and non design-related articles, a total of 130 relevant technical articles and 147 patents were identified. The most common method proposed for cushioning the lower limb in an impact uses an energy absorber (plastic foam or 'egg-crate') in front of a semi-rigid (steel or aluminum) beam. There are also proposals for 'spring steel', steel-foam composites, crush-cans, and plastic beams. The most common method proposed for supporting the lower limb in an impact is a secondary lower beam, known as a 'stiffener' or 'spoiler'. Most proposed lower stiffeners are plastic plates or metal beams supported by the engine undertray, the radiator support, or the front-end module. In addition to these concepts, there are a number of design proposals involving a deploying bumper or lower stiffener.

show abstract

Multiple Impact Simulations on Automotive Energy Absorbers Using a Recovery Based Material Model

Chaturvedi¹,

Chitteti²

2006

SAE Technical Paper Series

View full text Add to dashboard Cite

Method for Designing and Evaluating Pedestrian Protection Energy Absorbers for Various Car Geometries

Cited by 5 publications

References 3 publications

A bumper model with dynamic contact stiffness for simulations of pedestrian legform impacts

A bumper model with dynamic contact stiffness for simulations of pedestrian legform impacts

Current Trends in Bumper Design for Pedestrian Impact

Multiple Impact Simulations on Automotive Energy Absorbers Using a Recovery Based Material Model

Contact Info

Product

Resources

About