A significant event happened for electrical engineering in 2008, when researchers at HP Labs announced they had found "the missing memristor", a fourth basic circuit element that was postulated nearly four decades earlier by Dr. Leon Chua, who was also instrumental in developing the mathematical theories of memristive, memcapacitive and meminductive systems, resulting in an entire class of "mem-models" that are the foundation of the present work. By applying well-known mechanical-electrical analogies, the mathematics of mem-models may be transferred to the setting of engineering mechanics, creating the mechan-
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