Problem 01 Figure 1 shows the stress-strain curves from the tensile tests of four different materials:...

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Problem 01 Figure 1 shows the stress-strain curves from the tensile tests of four different materials: A, B, C and D. Choose T for True and F for false for the following statements about the materials. a. T/F: Material A is said to be the strongest. b. TF: Material B is said to be the most ductile. c. T/F: Material D is said to have the smallest Young's modulus. d. T/F: Material C is said to provide the highest modulus of toughness. e. T/F: Material C has higher modulus of resilience than material D. o (stress) A 2a W & (strain) Figure 1: Stress-stain curves for problem 01 Problem 02 Thermal properties A bar has an initial length of 100 mm at room temperature of 27°C. The tensile test indicates that the bar yields when it reaches is the stress level of 145 MPa and the strain value of 2.071 x 103. The bar is later placed in an oven and heated from room temperature to 100 °C. The linear coefficient of thermal expansion of the material is 23 x 10-6 °C-1 at 27°C, and 34 x 10-6 °C-1 at 527°C. Determine: a. What is the linear coefficient of thermal expansion at 100 °C? b. What is the length of the bar in millimeter at 100 °C? c. Does the heating from room temperature to 100 °C the cause the bar to yield? Page 1/2 Figure 2: Plate configuration for problem 03 Problem 01 Figure 1 shows the stress-strain curves from the tensile tests of four different materials: A, B, C and D. Choose T for True and F for false for the following statements about the materials. a. T/F: Material A is said to be the strongest. b. TF: Material B is said to be the most ductile. c. T/F: Material D is said to have the smallest Young's modulus. d. T/F: Material C is said to provide the highest modulus of toughness. e. T/F: Material C has higher modulus of resilience than material D. o (stress) A 2a W & (strain) Figure 1: Stress-stain curves for problem 01 Problem 02 Thermal properties A bar has an initial length of 100 mm at room temperature of 27°C. The tensile test indicates that the bar yields when it reaches is the stress level of 145 MPa and the strain value of 2.071 x 103. The bar is later placed in an oven and heated from room temperature to 100 °C. The linear coefficient of thermal expansion of the material is 23 x 10-6 °C-1 at 27°C, and 34 x 10-6 °C-1 at 527°C. Determine: a. What is the linear coefficient of thermal expansion at 100 °C? b. What is the length of the bar in millimeter at 100 °C? c. Does the heating from room temperature to 100 °C the cause the bar to yield? Page 1/2 Figure 2: Plate configuration for problem 03

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