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Unformatted text preview: reaction by the spring, which is followed by stress relaxation according to an exponential law Eq. (8). The factor ~ / p , with dimengions of time, may be called a relaxation time: it characterizes the rate of decay of the force. For the Voigt solid, a sudden application of force will produce no im- mediate deflection because the dashpot, arranged in parallel with the spring, will not move instantaneously. Instead, as shown by Eq. (5) and Fig. 1.2:2(b), a deformation will be gradually built up, while the spring takes a greater and greater share of the load. The dashpot displacement relaxes exponentially. Here the ratio q/p is again a relaxation time: it characterizes the rate of decay of the deflection....
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- Fall '05