In a metal forming operation when the material has just started yielding, the principal stresses are: σ 1 = +180MPa,σ2 = -100 MPa, σ3 = 0 Following Von Mises criterion, the yield stress is ________ MPa

A steel sheet with inhomogeneity factor of f0 = 0.995 is deforming in balanced biaxial tension with σ1a and σ2a as principal stresses in the uniform region ‘A’. What is the major principal stress σ1b in the groove ‘B’ at a small effective plastic strain of 0.05 if the material follows σ̅σ̅= 600 (0.004 +ε̅ε̅  )0.2 MPa hardening model. Find the value in MPa.

What is yield stress of material?Question 6Select one:a.A limit stress above of which the material become a liquidb.A limit stress above of which the material will be deformable plasticallyc.A limit stress above of which will material structure change

At a point in a strained material the principal stresses are 100 MPa (tensile) and 60 MPa (compressive). Determine the normal stress, shear stress and resultant stress on a plane inclined at 50° to the axis of major principal stress. Also determine the maximum shear stress at a point. what will be the solution

For a steel sheet with k = 500 MPa, ε0= 0.05, n = 0.30, the true strain at necking would be ___________ if tensile necking begins at the maximum load. Choose the best from the choices. (a) 0.25 (b) 0.30 (c) 0.2 (d) 0.15

Determine the minimum material yield strength required based on a limit strength design if a factor of safety of 1.5 is required.  Provide your answer in units of MPa to 2 decimal places.