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Distributions of relaxation and retardation times. Assume there are three relaxation times, three Maxwell elements with different E and h connected in a parallel way. Three forces add up to give similar elongations. Epsilon subzero is a fixed value in this relaxation experiment. It is force, sigma, that gradually becomes zero. Obtain formula 11.76 on p. 439, and explain graph 11.34 on p. 440. Try to obtain equation 11.79 for compliance D=1/E for creep. Explain also eqs. 11.80 and 11.81. |