1. The displacement field in a material is given by: Ax1x [][] = B(5x1 + x2) ] where A is a small positive constant and B is a small negative constant. (a) Calculate the strain and rotation tensors (5 marks) (b) Sketch a unit square deformed by this displacement field (5 marks) Hint: Calculate the displacement at the corners of a unit square, i.e. plug in the coordinates for the corners into the displacement field. Sketch the original corners and connect with lines to get the unit square. Sketch the displaced corners and connect with lines to get the deformed unit square.