Materials for Civil and Construction Engineers (4th Edition)
Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Chapter 10, Problem 10.20QP
To determine

The modulus of rupture and the apparent modulus of elasticity.

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A static center-point bending test was performed on a 50 X50 X760 mm wood sample according to ASTM D143 procedure (span between supports = 710 mm) If the maximum load was 2.67 kN, calculate the modulus of rupture.
SIZED-BOND PAPER. 1. A center-point bending test was performed on a 2 in x 4 in wood lumber according to ASTM D198 procedure with a span of 4 ft. and the 4 in side is positioned vertically. If the maximum load was 240 kips and the corresponding deflection at the mid-span was 2 in, calculate the modulus of rupture and the apparent modulus of elasticity
A third-point bending test was performed on a 100 * 150 mm wood lumber according to ASTM D198 procedure with a span of 1.8 m and the 150 mm side is positioned vertically. A strain gauge is glued at the center point between the supports. The strain gauge is zeroed at the start of the test when the force is zero. A strain of 0.00456 is measured when the combined load is 6.672 kN and the load–strain curve is in the linear range. Determine the flexural modulus of elasticity. If the maximum combined load on both loading bearings was 22.722 kN, calculate the modulus of rupture.
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