THE EFFECT OF PARTICLE, WALL AND FLUID PROPERTIES ON COEFFICIENT OF RESTITUTION: EXPERIMENTAL WORK

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ROSTAMI MOSTAFA; ARDESHIR A.A.; AHMADI G.; THOMAS P.J.

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Journal: AMIRKABIR Year:2008 | Volume:18 | Issue:67-C Page(s): 31-40

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Title

THE EFFECT OF PARTICLE, WALL AND FLUID PROPERTIES ON COEFFICIENT OF RESTITUTION: EXPERIMENTAL WORK

Author(s)

ROSTAMI MOSTAFA | ARDESHIR A.A. | AHMADI G. | THOMAS P.J. | Issue Writer Certificate

Keywords

COEFFICIENT OF RESTITUTIONQ3

YOUNG'S MODULUSQ3

POISSON'S RATIOQ2

CRITICAL IMPACT VELOCITYQ3

TERMINAL VELOCITYQ3

Abstract

In this study, we measured experimentally the COEFFICIENT OF RESTITUTION as a function of impact velocity for metal and plastic spheres impacting Plexiglas plate. The results obtained in the air show that the COEFFICIENT OF RESTITUTION decreases when impact velocity increases. In other word, impact velocity and the material properties such as YOUNG'S MODULUS and POISSON'S RATIO of the particle and the plate significantly affect the particle rebound trajectories in the air. Thus, these parameters profoundly affected the propagation of elastic waves, elastic surface deformation and the effective coefficients of restitution. Conversely, the results obtained in water show that the restitution coefficient increases when impact velocity increases. For impact velocity larger than a critical value the particles show a reverse motion of bouncing and "e" increases monotonically with their impact velocity and reaches a constant value at their TERMINAL VELOCITY. The results also show that as the particles experience successive rebounds, the COEFFICIENT OF RESTITUTION from the first to the final impact systematically increases in the air and decreases in the water.

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APA: Copy

ROSTAMI, MOSTAFA, ARDESHIR, A.A., AHMADI, G., & THOMAS, P.J.. (2008). THE EFFECT OF PARTICLE, WALL AND FLUID PROPERTIES ON COEFFICIENT OF RESTITUTION: EXPERIMENTAL WORK. AMIRKABIR, 18(67-C), 31-40. SID. https://sid.ir/paper/721/en

Vancouver: Copy

ROSTAMI MOSTAFA, ARDESHIR A.A., AHMADI G., THOMAS P.J.. THE EFFECT OF PARTICLE, WALL AND FLUID PROPERTIES ON COEFFICIENT OF RESTITUTION: EXPERIMENTAL WORK. AMIRKABIR[Internet]. 2008;18(67-C):31-40. Available from: https://sid.ir/paper/721/en

IEEE: Copy

MOSTAFA ROSTAMI, A.A. ARDESHIR, G. AHMADI, and P.J. THOMAS, “THE EFFECT OF PARTICLE, WALL AND FLUID PROPERTIES ON COEFFICIENT OF RESTITUTION: EXPERIMENTAL WORK,” AMIRKABIR, vol. 18, no. 67-C, pp. 31–40, 2008, [Online]. Available: https://sid.ir/paper/721/en

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