Problem 3: On slide 19 of the Lecture 04 (Strain-Life), a set of hysteresis loops are...

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Problem 3: On slide 19 of the Lecture 04 (Strain-Life), a set of hysteresis loops are given for the monotonic and cyclic behavior of 4340 steel (data from JD Morrow. Cyclic Plastic Strain Energy and Fatigue of Metals. in Internal Friction, Damping, and Cyclic Plasticity, ASTM 378, Pg 45- 87, 1964.). (a) Explain what these hysteresis loops represent, i.e. how was this curve generated? (b) Extract the data and fit the monotonic and cyclic Ramberg-Osgood expression for K & n (for the monotonic resposne) and K' and n' (for the cyclic response). " Stress SAE 4340 Steel Compare to the monotonic - curve Displaying Cyclic Softening Monctonic - Curve Cyclic - < Curve 20 0.01 in/in Strain JD Morrow. Cyclic Plastic Strain Energy and Fatigue of Metals. in Internal Friction, Damping, and Cyclic Plasticity, ASTM 378, Pg 45-87, 1964. Loops Approximate Shape Only Problem 3: On slide 19 of the Lecture 04 (Strain-Life), a set of hysteresis loops are given for the monotonic and cyclic behavior of 4340 steel (data from JD Morrow. Cyclic Plastic Strain Energy and Fatigue of Metals. in Internal Friction, Damping, and Cyclic Plasticity, ASTM 378, Pg 45- 87, 1964.). (a) Explain what these hysteresis loops represent, i.e. how was this curve generated? (b) Extract the data and fit the monotonic and cyclic Ramberg-Osgood expression for K & n (for the monotonic resposne) and K' and n' (for the cyclic response). " Stress SAE 4340 Steel Compare to the monotonic - curve Displaying Cyclic Softening Monctonic - Curve Cyclic - < Curve 20 0.01 in/in Strain JD Morrow. Cyclic Plastic Strain Energy and Fatigue of Metals. in Internal Friction, Damping, and Cyclic Plasticity, ASTM 378, Pg 45-87, 1964. Loops Approximate Shape Only