1. For the quadrilateral elements shown in Figure P10–17, evaluate the sti¤ness matrices using…


1. For the quadrilateral elements shown in Figure P10–17, evaluate the sti¤ness matrices using four-point Gaussian quadrature as outlined in Section 10.4. Let E = 210 GPa and n = 0:25. The global coordinates (in millimeters) are shown in the figures.

2. Evaluate the matrix ½B for the quadratic quadrilateral element shown in Figure 10–15 on page 521 (Section 10.5).