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A material is tested in tension and found to have the following stress-strain graph. The coordinates of point B on the graph are (0.25, 56). The elastic modulus of the material is 7.8 GPa.
HInt - approximate the number of squares under the curve.
Calculate the toughness of the material. Give your answer in MJ/m3 (equivalent to MPa) to at least 2 significant figures
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