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Global stiffness K is a______ matrix.

(a) Identity matrix

(b) Upper triangular matrix

(c) Lower triangular matrix

(d) Banded matrix

I have been asked this question during an interview.

This question is from One Dimensional Problems in division One Dimensional Problems of Finite Element Method

1 Answer

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Best answer
Correct answer is (d) Banded matrix

Explanation: A banded matrix is a sparse matrix whose non zero entities are confined to a diagonal band, comprising the main diagonal and zero or more diagonals on either side. A global stiffness matrix K is a banded matrix. That is, all the elements outside the band are zero.

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