Determine the plastic moment Mp of a steel beam of the cross section shown, assuming the steel to be elastoplastic with a yield strength of 240 MPa. Step 1: Determine the location of the neutral axis (NA). Step 2: We will divide the cross section into different areas and draw a stress diagram to determine the location of the resultant forces acting on each area. Remember, when a material is plastic that means everything has yielded. Step 3: Determine the magnitude of each force. Step 4: Determine each force's lever arm. Step 5: Calculate plastic moment. ANS = 19.01 kN-m
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January 2023
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