In the following diagram, the green ellipse shows the yielding criteria according to von-mises for isotropic material. What does the red ellipse represent?

Tresca’s yielding criteria for anisotropic material

Tresca’ yielding criteria for isotropic material

Von-mises yielding criteria for anisotropic material

Tresca’s yielding criteria for anisotropic material

Experimental data of von-mises criteria for isotropic material

The following diagram represents the equation σ12+σ32 – σ1σ3 = σo2 for the von-mises condition.The plot is known as the yield locus for Von-Mises criteria. Which of the following statement is not correct?

The yield locus of Tresca criteria falls inside the of the Von-Mises criteria

Both the Von-Mises and Tresca’s method predicts the same yield stress for uniaxial stress

Both the Von-Mises and Tresca’s method predicts the same yield stress for balance biaxial stress

The yield locus of Tresca criteria falls outside the of the Von-Mises criteria

1.	The Prandtl-Reuss stress strain relation equation is used for _____________
A.	elastic material
B.	ideal Plastic material
C.	viscous material
D.	elastic-plastic material
Answer» E.

2.	The levy mises stress-strain relation equation is used for _____________
A.	elastic material
B.	ideal Plastic material
C.	viscous material
D.	elastic-plastic material
Answer» B. ideal Plastic material

3.	Octahedral stresses are the stresses acting on the faces of a three-dimensional octahedron which has the geometric property that the faces of the planes make equal angles with each of the three principal directions of stresses.
A.	True
B.	False
Answer» B. False

4.	In the following diagram, the green ellipse shows the yielding criteria according to von-mises for isotropic material. What does the red ellipse represent?
A.	Tresca’ yielding criteria for isotropic material
B.	Von-mises yielding criteria for anisotropic material
C.	Tresca’s yielding criteria for anisotropic material
D.	Experimental data of von-mises criteria for isotropic material
Answer» C. Tresca’s yielding criteria for anisotropic material

5.	Von-mises and Tresca yielding criteria applies to both the isotropic and anisotropic materials.
A.	True
B.	False
Answer» C.

6.	The greatest divergence in predicting the yield stress for distortion between the Tresca’s criteria and Von-Mises criteria occurs at __________
A.	uniaxial tension/compression
B.	balanced biaxial stress
C.	pure shear stress
D.	always predicts equal stress
Answer» D. always predicts equal stress

7.	The following diagram represents the equation σ12+σ32 – σ1σ3 = σo2 for the von-mises condition.The plot is known as the yield locus for Von-Mises criteria. Which of the following statement is not correct?
A.	The yield locus of Tresca criteria falls inside the of the Von-Mises criteria
B.	Both the Von-Mises and Tresca’s method predicts the same yield stress for uniaxial stress
C.	Both the Von-Mises and Tresca’s method predicts the same yield stress for balance biaxial stress
D.	The yield locus of Tresca criteria falls outside the of the Von-Mises criteria
Answer» E.

8.	For the biaxial plane stress condition, the von Mises yield criteria can be expressed as:σ12+σ32 – σ1σ3= σo2The above equation physically represents _________
A.	circle
B.	straight line
C.	ellipse
D.	parabola
Answer» D. parabola

9.	For the biaxial plane stress condition, the von Mises yield criteria can be expressed as ___________Given that principal stresses are σ1, σ2, σ3 where σ2=0 and yield stress is σo.
A.	σ1+ σ3 = σo
B.	σ12+σ32 – σ1σ3 = σo2
C.	σ1+ σ3 – σ1σ3 = σo2
D.	σ1+ σ3 – σ1σ3 = σo
Answer» C. σ1+ σ3 – σ1σ3 = σo2