Abstract
The previous Chapter, which dealt with the various types of waves that can occur in a solid body, in all cases made use of some form of Hooke’s law—that is, it always involved proportionality between stress and strain. Hooke’s law, like most laws of physics, is exact only for ideal situations, which represent limiting conditions for practical situations. For the topics treated in the previous Chapter, the deviations from Hooke’s law exhibited by actual structures are unimportant. But, for example, in relation to processes that take place over relatively long times, one finds that the relations derived in the previous Chapter are unsatisfactory; although it is evident even from cursory observation that every oscillation decays with space and time, the previously derived relations (for example, Eqs. (II, 11) and (II, 12)) imply that a motion continues forever once it has been started.
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References
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Cremer, L., Heckl, M. (1988). Damping. In: Structure-Borne Sound. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-10121-6_3
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