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The stiffness matrix from the quadrilateral element can be derived from _____

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The stiffness matrix from the quadrilateral element can be derived from _____

(a) Uniform energy

(b) Strain energy

(c) Stress

(d) Displacement

This question was posed to me in my homework.

I need to ask this question from Two Dimensional Isoparametric Elements in portion Two Dimensional Isoparametric Elements and Numerical Integration of Finite Element Method

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Right option is (b) Strain energy

Easy explanation: In the finite element method for the numerical solution of elliptic partial differential equations, the stiffness matrix represents the system of linear equations that must be solved in order to as certain an approximate solution to the differential equation.

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