?? quadraticbarelementstiffness.m
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function y = QuadraticBarElementStiffness(E,A,L)
%QuadraticBarElementStiffness This function returns the element
% stiffness matrix for a quadratic bar
% with modulus of elasticity E,
% cross-sectional area A, and length L.
% The size of the element stiffness
% matrix is 3 x 3.
y = E*A/(3*L)*[7 1 -8 ; 1 7 -8 ; -8 -8 16];
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