The ratio of the true width strain to the true thickness strain in a sheet tensile test, r = Eu/Ei. A high r-value indicates a material with good drawing properties. Also called r-value.
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Still Building America—Welding big birds, pursuing big dreams - by Josh Welton Welder and inspector Lucca Ilbert, who trained at the Robert Morgan Educational Center in Miami, loves fabricating and repairing aircraft parts. He hopes one day to have his own FAA-approved custom fabricating shop.
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