| 摘要 |
PROBLEM TO BE SOLVED: To provide an elastic modulus measuring method capable of precisely measuring bending elastic modulus by reducing the error of a measuring system in the measurement of the bending elastic modulus due to a three-point bending method. SOLUTION: The displacement quantitiesΔW<SB>1</SB>andΔW<SB>2</SB>of the central parts of test pieces X and Y, both of which are made of the same material, equal in length and different in width, with the respect to the change quantityΔP of the stress applied to the central parts of the test pieces X and Y are measured with respect to the test pieces X and Y. The bending elastic moduli E of the respective test pieces are calculated from these measuring values, the interval S between the two supports, the thicknesses h<SB>1</SB>and h<SB>2</SB>of the test pieces X and Y, the widths b<SB>1</SB>and b<SB>2</SB>of the test pieces X and Y and the width ratio 1:A of the test pieces X and Y. COPYRIGHT: (C)2009,JPO&INPIT
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