The Concept of Stress, Generalized Stresses and Equilibrium by Tomasz Wierzbicki (source code)

= The Concept of Stress, Generalized Stresses and Equilibrium by Tomasz Wierzbicki
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https://ocw.mit.edu/courses/2-080j-structural-mechanics-fall-2013/8e61abd2b094e2214465ce18ab8eb440_MIT2_080JF13_Lecture3.pdf

MIT OpenCourseWare, 2.080J Structural Mechanics, Fall2013, Lecture3. The official lecture index identifies <Tomasz Wierzbicki> as instructor: https://ocw.mit.edu/courses/2-080j-structural-mechanics-fall-2013/pages/lecture-notes/ . Sections3.4–3.5, equations3.46 and3.52–3.57, printedpp.3-18–3-20, derive beam virtual work, endpoint moment/rotation pairs and alternatives between prescribed end loads and prescribed end motions.