ANALYSIS OFSTRESSAND STRAIN 6 Original element ( known element) Example 1 Plot the known elements of point A, B C sho own In the following figures 92g O M6、Original element（known element）： Example 1 Plot the known elements of point A、B、C shown in the following figures. tzx P P A A s sx x M P x y z B C s sx x B t xz C t xy t yx