Maxwell's reciprocity theorem

Maxwell's reciprocity theorem
for two identically-sized forces applied at the distinct points A and B on a linear structure, Maxwell's reciprocity theorem states that the displacement at A caused by the force at B is the same as the displacement at B caused by the force at A. As a result, the flexibility matrix (and its inverse, the stiffness matrix) of linear systems is symmetric.

Mechanics glossary. 2013.

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