Question:medium
What is the stiffness matrix for the beam shown in the figure (fixed at one end, guided roller at the other)?
What is the stiffness matrix for the beam shown in the figure (fixed at one end, guided roller at the other)?
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For standard 1D beam elements, axial and flexural effects are uncoupled. This means the off-diagonal terms in the stiffness matrix related to axial force vs. rotation will always be zero.
Updated On: May 20, 2026
- $\begin{bmatrix} \frac{AE}{L} & \frac{4EI}{L} \\ 0 & 0 \end{bmatrix}$
- $\begin{bmatrix} \frac{AE}{L} & 0 \\ \frac{3EI}{L} & 0 \end{bmatrix}$
- $\begin{bmatrix} \frac{AE}{L} & 0 \\ 0 & \frac{4EI}{L} \end{bmatrix}$
- $\begin{bmatrix} 0 & \frac{4EI}{L} \\ 0 & \frac{AE}{L} \end{bmatrix}$
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The Correct Option is C
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