=+Problem 6.4 The stiffness matrix of a clamped-free bar discretized with N elements is a N

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=+Problem 6.4 The stiffness matrix of a clamped-free bar discretized with N elements is a N × N tridiagonal matrix of the form:

K = k

2 −1 0 … … 0

−1 2 −1 ⋱⋱ ⋮

0 −1 2 −1 ⋱ ⋮

⋮ ⋱⋱⋱⋱ 0

⋮ ⋱⋱⋱ 2 −1 0 … … 0 −1 1

(P6.4.a)

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