shear yield stress of the
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- You are given a square rod of 6061-T6 aluminum (cross-section = 4mm X 4mm, length = 2.3m). The material has a Young’s modulus of 72 GPa. If a compressive load of 3 kN is applied parallel to the 2.3m dimension, what is the resulting engineering normal strain?Suppose an ideally-prepared test specimen in an R.R. Moore rotating beam test has an ultimate strength of 159 ksi. The factor f is 0.73 If the specimen is subjected to a completely-reversing cyclic loading with a stress amplitude 105 ksi, how many cycles of life are expected?A tensile stress is to be applied along the axis of a cylindrical brass rod with diameter of 200 mm. What is the load magnitude required to produce 2.8 x 10^-2 change in diameter if the deformation is entirely elastic?
- 1. A part made of Aluminum 6061-T6 has a yield strength = 400 MPa. For each stress state below, draw all 3 Mohr's circles, find the principal stresses, and calculate the safety factor against yield using both the distortion-energy (von Mises) and maximum shear stress (Tresca) criterions. (If relevant) A clearly labeled diagram (or diagrams) clearly pertaining to your analysis with a coordinate system and relevant labels. Final answer with appropriate units and significant figures. You can use the fprintf() command in MATLAB to format numerical results A 2-3 sentence reflection on your answer. Does it make sense? Why or why not? What are some implications?The HB number associated with a tensile strength of 245,000 psi is ____________ HB Yield strength, ultimate tensile strength, linear coefficient of thermal expansion, modulus of elasticity (E), proportional limit, and rupture strength are all examples of mechanical properties of engineering materials. True FalseIf the principal stresses on a material with a yield stress in shear are σ1 = 175 MPa and σ2 = 350 MPa, what tensile stress σ3 must be applied to cause yielding according to the Tresca criterion? b) If the stresses in a) were compressive, what tensile stress σ3 must be applied to cause yielding according to the Tresca criterion
- "The maximum principal stress yield criterion is an appropriate choice for ductile materials but the maximum principal strain criterion is preferable". Is this true or false?During stress-strain test, the unit deformation at a stress of 35 MPa was observed to be 167 x 10^-6 m/m and at a stress of 140 MPa it was 667 x 10^-6. If the proportional limit was 200 MPa, what is the modulus of Elasticity (GPa)? What is the strain corresponding to a stress of 80 MPa?Define the term absolute maximum shear stress in the material?
- Figure shows an example of pressure vessel with radius of r, and yield stress ??. Suppose the vessel is subjected to uniform internal pressure p, determine the minimum thickness to sustain the pressure according to: (i) Von Mises yield criterion(ii) Tresca yield criterionA steel rod (initial diameter: 3.2 mm, initial length: 42 mm) is extended by auniaxial tensile load of 4800 N in 120 seconds. At this load, the length of therod is measured as 49,2 mm. Calculate the followings:(a) Stress and strain occurred on the rod at this load.(b) Initial strain rate.(c) Diameter of the rod at this load.(Yield strength : 380 MPa, Ultimate Tensile Strength: 670 MPa,Modulus of Elasticity: 210000 MPa were given for this material)A tensile stress of 9000 psi and a shear stress of 4000 psi are induced in a brittle material whose working strength in straight tension is 10500 psi. What is the maximum tensile (axial) stress?