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2.10.12 Plates Subjected to In-Plane Forces

The simplest element available in two-dimensional stress analysis is the triangular element. The stiffness and consistent load matrices of such an element will now be obtained by applying the equation derived in the previous section.

Consider the triangular element shown in Figure 2.89a. There are two degrees of freedom per node and a total of six degrees of freedom for the entire element. We can write and expressed as

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