of a structural member (like a beam or rod) used to perform an analysis of internal forces In engineering mechanics, this is known as the Method of Sections . Here is how that "piece" is used in the text: Internal Resultants
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: Popov establishes a rigorous understanding of internal forces (stress) and the resulting deformations (strain). of a structural member (like a beam or
The phrase in the context of E.P. Popov's Mechanics of Materials typically refers to a specific segment or section popov mechanics of materials pdf
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