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Principles of Crush Energy Determination
Technical Paper
1999-01-0106
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Post-impact deformation has long been used to assess the severity of vehicular impact. If similar deformation of a similarly impacted vehicle has been experimentally observed, the speed change during a subject impact may be estimated.
Crush energy is the usual intermediary, and all crush energy methods to date use the same physical model, that of the energy of compression of a uniformly, but not necessarily linearly, elastic region of an otherwise rigid vehicle. This paper reviews the various inferences historically associated with this “standard model,” including some which oversimplify or fail to follow logically from the model.
It is concluded that treatments which are more complete or which do follow logically from the standard model can easily be derived. Improved treatments, which more closely duplicate the effects which must be present in the subject, “real-world” impact, are presented. Application of these relationships to a spectrum of experimental data is not within the scope of this paper.
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Authors
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Citation
Fonda, A., "Principles of Crush Energy Determination," SAE Technical Paper 1999-01-0106, 1999, https://doi.org/10.4271/1999-01-0106.Also In
References
- Campbell, K L “Energy Basis for Collision Severity,” SAE 740565 July 1974
- “CRASH3 User's Guide and Technical Manual,” US DOT Technical Report DOT-HS-805-732 Feb 1981
- Emori, R I “Analytical Approach to Automobile Collisions,” SAE 680016 Jan 1968
- Fonda, A G “CRASH Extended for Desk and Handheld Computers,” SAE 870044 Feb 1987
- Fonda, A G “Crush Energy Formulations and Single-Event Reconstruction,” SAE 900099 Feb 1990
- Fonda, A G “Physical Models for Crush Energy Evaluation,” CMRSC-VII-204 June 1991
- Fonda, A G “Nonconservation of Momentum During Impact,” SAE 950355 , in SP-1083 Feb 1995
- Goldsmith, W “Impact,” Edw Arnold London 1960
- Marquard, E. “Progress in the Calculations of Vehicle Collisions,” ATZ 68 3 74 80 1966
- McHenry, R R “Computer Program for Reconstruction of Highway Accidents,” SAE 730980 Nov 1973
- McHenry, R R “A Comparison of Results Obtained with Different Analytical Techniques for Reconstruction of Highway Accidents,” SAE 750983 Oct 1975
- McHenry, R R “Extensions and Refinements of the CRASH Computer Program Part I - Analytic Reconstruction of Highway Accidents,” DOT HS-801 837 Feb 1976
- McHenry, R R McHenry, B G “McHenry Accident Reconstruction, 1998 McHenry Seminar,” McHenry Software October 1998
- Monk, M “Update of CRASH3” DOT HS 806-446 1983
- Neptune, J A Flynn, J E “A Method for Determining Accident Specific Crush Stiffness Coefficients,” SAE 940913 , in SP-1030 Feb 1994
- Neptune, J A Flynn, J E “A Method for Determining Crush Stiffness Coefficients from Offset Frontal and Side Crash Tests,” SAE 980024 , in SP-1319 Feb 1998
- Neptune, J A Private communication 10 28 98
- NHTSA Netsite http://www-nrd.nhtsa.dot.gov/
- nrd10/nrd11/databases.html
- http://www.tarorigin.com/art/tlangley/
- Prasad, A K “CRASH3 Damage Algorithm Reformulation for Front and Rear Collisions,” SAE 900098 , in SP-814 Feb 1990
- Prasad, A K “Energy Absorbed By Vehicle Structures in Side Impacts,” SAE 910599 , in SP-851 Feb 1991
- Routh, B J “Dynamics of a System of Rigid Bodies,” Macmillan & Co. London 1897
- Smith, R A et al “Accuracy and Sensitivity of CRASH,” SAE 821169 , in P-113 1982
- Severy, D M et al “Technical Findings from Automobile Impact Studies” SAE Transactions 65 67 1956-1962
- Stucki, S L Fessahaie, O “Comparison of Measured Velocity Change in Frontal Crash Tests to NASS Computed Velocity Change,” SAE 980649 , in SP-1333 Feb 1998
- Tumbas, N S Smith, R A “Measuring Protocol for Quantifying Vehicle Damage from an Energy Basis Point of View,” SAE 880072 Feb. 1988
- Varat, M S Husher, S E Kerkhoff, J F “An Analysis of Trends of Vehicle Frontal Impact Stiffness,” SAE 940914 , in SP-1030 Feb 1994