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TECHNICAL PAPERS

Numerical and Experimental Study of Strain Rate Effects in Laser Forming

[+] Author and Article Information
Wenchuan Li, Y. Lawrence Yao

Department of Mechanical Engineering, Columbia University, New York, NY 10027

J. Manuf. Sci. Eng 122(3), 445-451 (Jan 01, 2000) (7 pages) doi:10.1115/1.1286731 History: Received July 01, 1999; Revised January 01, 2000
Copyright © 2000 by ASME
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References

Figures

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Schematic of straight-line laser bending
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Experimental and numerical bend angle under constant line energy
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Simulated time histories of temperature under the condition of constant line energy 17
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Simulated time histories of temperature at the top surface under the condition of constant peak temperature
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Experimental values of line energy and laser power under the condition of constant peak temperature
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FEM and experimental bend angle under the condition of constant peak temperature
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FEM and X-ray diffraction measurement of residual stress for the samples scanned under the condition of constant peak temperature
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Typical simulated time histories of plastic strains in the Y direction
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Simulated plastic strain in Y direction under the condition of constant peak temperature
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Simulated strain rate in Y direction under the condition of constant peak temperature
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Simulated results for comparison of the effect of high and low strain rate on residual stress
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Hardness vs. simulated plastic strain in Y direction under the condition of constant peak temperature (data in brackets are the corresponding scanning velocities in mm/s)

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