This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Considerations for a Femur Injury Criterion
Annotation ability available
Sector:
Language:
English
Abstract
A femur fracture injury criterion is presented that assesses the dependence of the permissible human knee load on the duration of the primary force exposure. Currently a constant allowable femur load limit of 7.6 kN (1700 lb) is specified in FMVSS 208, but recently the Federal Government proposed elevating the allowable limit to 10.0 kN (2250 lb), which is in excess of the limited experimental average static femur fracture force of 8.90 kN (2000 lb). A general analysis of all of the available biomechanics data and mathematical models on femoral impact response and fracture indicates a significant load time dependence for primary pulse durations below 20 ms that can elevate the permissible femur load above the Federally proposed allowable limit of 10.0 kN (2250 lb). A femur injury criterion was therefore formulated that is consistent with the available experimental data, incorporates the temporal characteristics of the femur fracture force, and provides a technically feasible and improved protective test standard for car occupant safety evaluations. Dynamic differences between the femoral response of the human cadaver and the Part 572 dummy were subsequently quantified to substantiate the efficacy of applying the Femur Injury Criterion to the measured response of the Part 572 dummy.
Recommended Content
| Technical Paper | Virtual Testing of Driver OOP Scenarios: Effect of Modeling Detail on Injury Response |
| Technical Paper | Appling CAE to Understand the Causality of Dummy Neck Injury Readings |
Authors
Citation
Viano, D., "Considerations for a Femur Injury Criterion," SAE Technical Paper 770925, 1977, https://doi.org/10.4271/770925.Also In
References
- Proposed Amendment to FMVSS 208 as noted in the Federal Register (FR Doc. 76-20990) 41 139 29715 July 19 1976
- Melvin J. W. Stalnaker R. L. Alem N. H. Benson J. B. Mohan D. “Impact Response and Tolerance of the Lower Extremities,” SAE 751159 , 19th Stapp Car Crash Conference November 1975
- Melvin J. W. “Tolerance and Response of the Knee-Femur-Pelvis Complex to Axial Impact,” HSRI Report No. UM-HSRI-76-17, Human Tolerance to Impact Project, MVMA Project
- Powell W. R. Ojala S. J. Advani S. H. Martin R. B. “Cadaver Femur Response to Longitudinal Impacts,” SAE 751160 , 19th Stapp Car Crash Conference November 1975
- Carothers C. O. Smith F. C. Calabrisi P. “The Elasticity and Strength of Some Long Bones of the Human Body,” Project No. NM 001 056.02.13 Naval Medical Research Institute, National Naval Medical Center Bethesda, MD October 6 1949
- Viano D. C. Khalil T. B. “Investigation of Impact Response and Fracture of a Human Femur by Finite Element Modeling,” SAE 760773 , Mathematical Modeling Biodynamic Response to Impact, SP-412 October 1976
- Patrick L. M. Kroell C. K. Mertz H. J. “Forces on the Human Body in Simulated Crashes,” 9th Stapp Car Crash Conference October 1965
- Patrick L. M. Mertz H. J. Kroell C. K. “Cadaver Knee, Chest and Head Impact Loads,” SAE 670913 , 11th Stapp Car Crash Conference October 1967
- Horsch J. D. Patrick L. M. “Cadaver and Dummy Knee Impact Response,” SAE 760799 October 1976
- Kroell C. K. Schneider D. C. Nahum A. M. “Comparative Knee Impact Response of Part 572 Dummy and Cadaver Subjects,” SAE 760817 , 20th Stapp Car Crash Conference October 1976
- Hering W. E. Patrick L. M. “Response Comparisons of the Human Cadaver Knee and a Part 572 Dummy Knee to Crushable Materials,” 21st Stapp Car Crash Conference October 1977