This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Crush Strength Analysis of Lightweight Vehicle Frame Components
Annotation ability available
Sector:
Language:
English
Abstract
An analytical technique is presented in this paper to analyze the crush strength (or force-deflection curve) of lightweight vehicle frame components which are made of: 1) high-strength steel, 2) aluminum alloy, and 3) fiber-reinforced composite. Experimental data are also included. It has been found that plastic flow of material and local buckling of sections are the key factors influencing the crush strength of metal structures, while elastic modulus and fracture strain are the dominant factors for fiber-reinforced composites such as glass-polyester and graphite-epoxy in their crush strength.
High-strength steel and aluminum alloy offer the best alternatives to mild steel in terms of meeting the required crush strength with maximum weight savings. For a given design peak force, use of fiber-reinforced composites can generally result in significant weight savings. However, when the energy absorption capability is concerned, fiber-reinforced composites such as glass-polyester and graphite-epoxy used in this particular frame application are not as efficient as their metal counterparts due to their brittle fractures at low strength values.
Recommended Content
Authors
Citation
Ni, C., "Crush Strength Analysis of Lightweight Vehicle Frame Components," SAE Technical Paper 810232, 1981, https://doi.org/10.4271/810232.Also In
References
- Ni C. M. “Impact Response of Curved Box Beam-Columns with Large Global and Local Deformations.” AIAA Paper 73-401 AIAA/ASME/SAE 14th Structures, Structural Dynamics, and Materials Conference 1973
- Leslie W. C. Sober R. J. Babcock S. G. Green S. J. “Plastic Flow in Binary Substitutional Alloys of BCC Iron -- Effect of Strain Rate, Temperature, and Alloy Content.” Transactions of the American Society of Metals 62 1969
- Holt D. L. Babcock S. G. Green S. J. Maiden C. J. “The Strain-Rate Dependence of the Flow Stress in Some Alluminum Alloys.” Transactions of the American Society of Metals 60 1967
- Symonds P. S. “Viscoplastic Behavior in Response of Structures to Dynamic Loading.” “Behavior of Materials Under Dynamic Loading,” Nuffington N. J. American Society of Mechanical Engineers 1965
- Ting T. C. T. “The Plastic Deformation of a Cantilever Beam with Strain-Rate Sensitivity under Impulsive Loading.” Brown University TR70, Contract Nonr-562(10) July 1961