A STUDY ON THE DESIGN OF AUXETIC STRUCTURE OF SEAT SKELETON
DOI:
https://doi.org/10.7494/mech.2012.31.2.72Keywords:
auxetic structures, seat, utility load, contact problemAbstract
This paper presents numerical study of deformation and stresses in seat skeleton elements subject to static and dynamic pressure loads. Elastic skeleton made of polyamide or elastomer is taken as an example of a seat material. Auxetic type of seat structure ensures the reduction of real contact stresses between human body and seat, making it more comfortable than typical. FEM analysis is performed using ABAQUS system. Numerical calculations are carried out to determine the nonlinear stiffness characteristics of seat springs. The study makes possible the selection of material and structural topology fulfilling design constraints and additional recommendations concerning structural flexibility, stability and optimal reduction of contact stresses. This paper presents an application of the problem.Downloads
References
ABAQUS manual
Ebe, K. and Griffin, M.J., 2001, Factors effecting static and seat cushion
comfort, Ergonomics, 41(10), pp. 901-992.
Zhao L.Q., Xia Q.S. and Wu X.T., 1994, Study of sitting comfort of automotive seats, SAE Conference 1994, SAE no 945243.
Park S.J. and Kim C.B., 1997, The evaluation of seating comfort by objective measures, SAE Conference 1997, 970595.
Scalia A., 2000, Contact Problem for Porous Elastic Half-Plane, J. Elasticity, vol. 60, pp. 91-102.
Szefer G., Kędzior D., 2002, Contact of Elastic Bodies with Negative
Poisson 's Ratio, Springer Verlag.
Janus-Michalska M., 2009, Micromechanical model of auxetic cellular material, Journal of Theoretical and Applied Mechanics Warsaw, 47, 4, pp. 21-45.
Lakes R.S., 1993, Design considerations for materials with negative
Poisson's ratios, Trans. ASME J. Mech. 115, pp. 696-700.
Stavroulakis G.E., 2005, Auxetic behavior: appearance and engineering
applications, Physica Status Solidi, No. 3, pp. 710-720.
Lakes R.S., 1987, Foam structures with a negative Poisson 's ratio, Science, 235, pp. 1038-1040.
Wang Y., Lakes R., 2002, Analytical parametric analysis of the contact problem of human buttocks and negative Poisson 's ratio foam cushions, Int. J. Sol. Struc. 39, pp. 4825-38.
Jasinska D., Janus-Michalska M., 2008, Material Design of Anisotropic Elastic Cellular Bodies with Respect to Contact Problem, Engineering Tansactions, 3, pp.....
Janus-Michalska M., Jasinska D., 2010, Contact problem for a class of anisotropic elastic cellular bodies with nonpositive Poisson 's ratio, Czasopismo Techniczne.
Smardzewski J., Wiaderek., Grbac., 2000, Numerical analysis of contact problems of human body and elastic matress, International Conference Ambienta, Zagreb, pp. 81-86.
Park S.J., Lee Y.S., Nahm Y.E., Lee J.W. and Kim J.S., 1998, Seating physical characteristics and subjective comfort: design considerations, SAE Conference, SAE no 980653.
erver M.M., van Hoof J., Oomens C.W.J., Wismans J.S.H.M., Baaijens F.P.T., 2004, A Finite Element Model of the Human Buttocks for Prediction of Seat Pressure Distributions, Computer Methods in Biomechanics and Biomedical Engineering, 7, 4, pp. 193-203.
Park S.J., Lee Y.S., Nahm Y.E., Lee J.W. and Kim J.S., 1998, Seating physical characteristics and subjective comfort: design considerations, SAE Conference, SAE no 980653.
Moens and Horva'th 2002, Using finite elements model of the human body for shape optimization of seats: optimization material properties, Proc. of the International Design Conference-Design.
Inagaki H., Taguchi T., Yasuda E. and Iizuka Y., 2000, Evaluation of riding comfort: from the viewpoint of interaction of human body and seat for static, dynamic and long time driving, SAE Conference, SAE no 2000-01-0643.
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