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Repositioning Methodology For FE-HBM Pelvis Flesh To Account For Upper Extremity Posture Change
Technical Paper
2011-01-0256
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Many research groups are developing Human Body FE Models (FE-HBM) as a tool to be used in safety research. The FE-HBM's currently available are in certain fixed postures. Repositioning of model in alternate postures is needed for use in out of position (OOP) occupant simulations and different pedestrian posture simulations. Postural change in upper extremity can be split two processes, viz, repositioning of spinal vertebra and repositioning of the soft tissue associated with the spine. The objective of this study is to establish a methodology to regenerate pelvis flesh with change in spine/pelvis position. The outer profile of the pelvis flesh should ideally be parametrically described with respect to the associated hard tissues which is not the case in existing FE-HBM's. The affine invariant (Farin, 1990) property of cubic Bezier curves is used in this study. It is hence implied that applying affine mapping to either the control points or to the points on the curve itself yields the same result. Initially, for each pelvis flesh contour, four points are identified (end points and two other points of significant curvature) to define a cubic Bezier curve and identify the associated control points. The upper extremity posture changes are described with respect to hip, pelvis, and thorax angles. The end points defining the contour of the pelvis flesh are relocated by affine transformations. The new shape of the pelvis flesh contour is then obtained using the control points located earlier. Mesh morphing using Barycentric coordinates is proposed to be used for repositioning of the interior pelvis flesh. The paper presents a new method which employs inverse parameterization of Bezier curve to re-compute the shape of the pelvis flesh. These computer graphics techniques used are time efficient and do not involve active user intervention. Further, the element quality and time steps are not significantly affected, thus preserving computational efficiency of the FE model. The method has been demonstrated through repositioning of the pelvis flesh with change in posture of lower spine segment in this paper. It will be extended to repositioning the upper spine segment of FE-HBM with change in spinal/pelvic posture.
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Chawla, A., Mukherjee, S., Marathe, R., and Malhotra, R., "Repositioning Methodology For FE-HBM Pelvis Flesh To Account For Upper Extremity Posture Change," SAE Technical Paper 2011-01-0256, 2011, https://doi.org/10.4271/2011-01-0256.Also In
References
- Anderson, GBJ Murphy, RW Ortengren, R Nachemson, AL The influnce of backrest inclination and lumbar support on lumbar lordosis Spine 1979 4 52 8
- Aubel, A. Thalmann, D. Interactive modelling of the human musculature, 2001 Proc. of Computer Animation
- Bass, C.R. Crandall, J.R. Bolton, J.R. Pilkey, W.D. et al. “Deployment of Airbags into the Thorax of an Out-of-Position Dummy,” SAE Technical Paper 1999-01-0764 1999 10.4271/1999-01-0764
- Blemker, S. S. Delp, S. L. Three dimensional representation of complex muscle architectures and geometries Annals of Biomedical Engineering 2005 33 5 661 673
- Benson, B.R. Smith, G.C. Kent, R.W. Monson, C.R. “Effect of Seat Stiffness in Out-Of-Position Occupant Response in Rear-End Collisions,” SAE Technical Paper 962434 1996 10.4271/962434
- Chawla, A Mukherjee, S Mohan, D Parihar, A Validation of lower exteremity model in Thums Proceedings of IRCOBI 2004 Graz, Austria 2004
- Chen, YL Centroid measurement of lumbar lordosis compared with the Cobb technique Spine 1999 24 1786 90
- Chernukha, KV Daffner, RH Reigel, DH Lumbar lordosis measurement. A new method versus Cobb technique Spine 1998 23 74 80
- Jani, D. Chawla, A. Mukherjee, S. Goyal, R et al. “Repositioning the Human Body Lower Extremity FE Model,” SAE Int. J. Passeng. Cars - Mech. Syst. 2 1 1024 1030 2009 10.4271/2009-01-0922
- Dong, F. Clapworthy, G. J. An anatomy based approach to human muscle modelling and deformation 2002 IEEE Visu and Comp Gr 8 2 154 170
- Haland, Y Pipkorn, B A Parametric Study of a Side Airbag System to Meet Deflection Based Criteria J Biomechanical Engineering 1996 118 412 419
- Hallman, JJ Yoganandan, N Pintar, FA Torso side airbag out-of-position evaluation using stationary and dynamic occupants Biomed Sci Instrum. 2008 44 123 128
- Harrison, DE Cailliet, R Harrison, DD Janik, TJ Holland, B Radiographic Analysis of Lumbar Lordosis: Cobb Method, Centroidal Method, TRALL or Harrison Posterior Tangents? Spine 2001 26 11 E235 E242
- Marathe, RS Chawla, A Mukherjee, S Malhotra, R Prediction Of Lumbar Spine Posture For Repositioning Of Spinal FE Model Proceedings of IRCOBI 2010 Hanover, Germany 2010
- Olsson, JA Skötte, L-G Svensson, S-E Air bag system for side impact protection Proceedings of the Conference on the Enhanced Safety of Vehicles 1989 976 983
- Ono, K Kaneoka, K. Inami, S Influence of seat properties on human cervical vertebral motion and head/neck/torso kinematics during rear-end impacts SAE Paper No. 1998-13-0021
- Parihar, A. Validation of human body finite element models (knee joint) under impact conditions 2004 M. Tech. Thesis Indian Institute of Technology Delhi
- Petit, P. Trosseille, X. Baudrit, P. Gopal, M. “Finite Element Simulation Study of a Frontal Driver Airbag Deployment for Out-of-Position Situations,” SAE Technical Paper 2003-22-0011 2003
- Prasad, P. Kim, A. Weerappuli, D.P.V. Roberts, V. et al. “Relationships Between Passenger Car Seat Back Strength and Occupant Injury Severity in Rear-End Collisions: Field and Laboratory Studies,” SAE Technical Paper 973343 1997
- Sheepers, F. Parent, R. Carlson, W. May, S. F. Anatomy based modelling of the human musculature 1997 SIGGRAPH '97 163 172
- Stagnara, P DeMauroy, JC Dran, G et al Reciprocal angulation of vertebral body in a sagittal plane: Approach to references for the evaluation of kyphosis and lordosis Spine 1982 7 335 42
- Strother, C.E. James, M.B. Gordon, J.J. “Response of Out-Of-Position Dummies in Rear Impact,” SAE Technical Paper 941055 1994
- Sugimoto, T. Yamazaki, K. First results from the JAMA human body model project 2005 The 19th International ESV Conference
- Sun, LW Lee, RYW Lu, W Luk, DK Modeling and simulation of the intervertebral movements of the lumbar spine using an inverse kinematic algorithm Med Biol Eng Comput 2004 42 740 746
- Wambolt, A Spencer, DL A segmental analysis of the distribution of the lumbar lordosis in the normal spine Orthop Transactions 1987 11 92 93
- Wood, KB Kos, P Schendel, M Persson, K Effect of patient position on the sagittal-plane profile of the thoracolumbar spine J Spinal Disorder 1996 9 165 169