A polymer rod is tested to determine its viscoelastic response. The rod’s cross-section is square with...

A polymer rod is tested to determine its viscoelastic response. The rod’s cross-section is square with the side of 5mm. The rod’s length before loading is 500mm. A tensile force of 500N is applied to the rod and the rod’s length under load was measured as a function of time. Instantly after applying the load, the rod is stretched to 508mm. After 24 and 48 hour under load, the rod’s length was measured as 550mm and 570mm, respectively. The load was then removedand the rod’s length was measured as 525mm after a long time after the removal of the force (consider this as the permanent length). Determine the parameters of the Burger’s model for describing this type of mechanical behavior.

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Ally Wells answered 6 months ago

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