The document discusses strain rate dependency in engineering materials. It notes that individual parts can show considerable effects when exposed to high strain rate loading, though strain rates are less critical for high strength steels. While the overall vehicle response may not be as affected by high strain rates as individual components, considering strain rate effects on critical components is still recommended to improve prediction accuracy in frontal impact analysis.

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Strain Rate Dependancy

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Engineering Learning Center
ELENO Engg. Learning Center, Pune, INDIA www.eleno-elc.com
Strain Rate Dependency

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Engineering Learning Center
ELENO Engg. Learning Center, Pune, INDIA www.eleno-elc.com
Strain Rate Dependency

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Engineering Learning Center
ELENO Engg. Learning Center, Pune, INDIA www.eleno-elc.com
Strain Rate Dependency

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Engineering Learning Center
ELENO Engg. Learning Center, Pune, INDIA www.eleno-elc.com
UE : Uniform
Elongation
TEL : Total
Elongation
Strain Rate Dependency

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Engineering Learning Center
ELENO Engg. Learning Center, Pune, INDIA www.eleno-elc.com
Strain Rate Dependency

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Engineering Learning Center
ELENO Engg. Learning Center, Pune, INDIA www.eleno-elc.com
Strain Rate Dependency
Effect of Strain Rate :
• Individual Parts show considerable effect when they are
exposed to high strain rate loading
• Strain rates are not very critical in case of high strength steel
components..
• The overall response of the vehicle is not affected as much as
we would expect from an individual components under high
strain rate loading
• To improve the prediction accuracy of the frontal impact
analysis, the consideration of the strain rate effects on all the
critical components of the vehicle is still recommended.

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Engineering Learning Center
ELENO Engg. Learning Center, Pune, INDIA www.eleno-elc.com
Strain Rate Dependency