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A urethane elastomer is selected as an artificial heart valve material. You wish to calculate the...

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Mechanical Engineering

A urethane elastomer is selected as an artificial heart valvematerial. You wish to calculate the maximum theoretical strain(strain endurance limit) the material can withstand forever. Thismaterial has a threshold fracture resistance of 50 J/m^2 based uponits crosslink density, its intrinsic flaw size is 50 micron, andits tensile modulus is 1 MPa.

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