Question

Pageく ) of Problem3 (45 pts. A cylindrical specimen of asphalt concrete with a 4-inch diameter and a 6- inch height is subjected to an axial compressive static load of 150 lb for 1 hour, after which the load is removed. The test was performed at a temperature of 100°F. Plots of stress versus time and strain versus time during the loading are given below. Is this material elastic or viscous? Explain. (10 pts.) How do you describe the mechanical behavior of this material? Explain Why. (5 pts. How much is the elastic modulus E of this material? (5 pts. What is the permanent strain at the end of the experiment? 5 pts.) What is the phenomenon of the change of specimen height during static loading called? What is the phenomenon of the change of specimen height after the load is removed? Propose an appropriate model (e-s-, spring, dashpot, Maxwell, Kelvin, Solid, Burgers, etc.) to describe the observed response. (10) Note: Support your answers with strong arguments, equations, diagrams, etc. 14 12 s 10 50 100 150 Time (min) MacBook Air

Answer 1

Soluhón Solb 1(%). 11366 he Dh h-h 6 - S.j16y

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