Question 18.P.15: Solve Problem 18.14 with each of the two finite elements a s...
Solve Problem 18.14 with each of the two finite elements a six-node triangle. In this case, however, determine the strains and stresses at the centroids of the two triangles.
\begin{aligned}& \mathbf{u}^{T}=10^{-3}\left[\begin{array}{lllllll}0.2986 & 0.3951 & 0.1524 & 0.3419 & 0.1893 & 0.1651 & -0.0078\end{array}\right. \\& \left.\begin{array}{lllll}-0.0984 & 0.0272 & -0.0497 & -0.0504 & -0.0096\end{array}\right] \text { in } \\& \varepsilon_{1}=10^{-4}\left\{\begin{array}{r}0.3354 \\-0.0991 \\0.0052\end{array}\right\} \quad \varepsilon_{2}=10^{-4}\left\{\begin{array}{r}0.3518 \\-0.0681 \\-0.0052\end{array}\right\} \\& \sigma_{1}=\left\{\begin{array}{c}1007.6 \\4.8 \\6.1\end{array}\right\} \quad \sigma_{2}=\left\{\begin{array}{c}1092.4 \\123.5 \\-6.1\end{array}\right\} \mathrm{psi}\end{aligned}