The yield strength of a high-strength steel is 1 GN/m2 and KIC is 100 MPa √m. The crack length that can cause sudden failure at half of its yield strength is ____mm.
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The yield strength of a high-strength steel is 1 GN/m2 and KIC is 100 MPa √m. The crack length that can cause sudden failure at half of its yield strength is ____mm. (Round off to two decimal places)
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- What stainless steel(s) would a. have low creep at high temperatures? b. be used for food service equipment?Steel subject to tensile stress of 1030 MPa, it has K1c of 54.8 MPa(m) – a handbook value If it has a ‘largest surface crack’ .5 mm (.0005 m) long will it grow and fracture? What crack size will result in failure?Figure 6.22 shows the tensile engineering stress– strain behavior for a steel alloy. (a) What is the modulus of elasticity? (b) What is the proportional limit? (c) What is the yield strength at a strain offset of 0.002? (d) What is the tensile strength?
- Calculate is the largest size (mm) internal through crack that a thick plate of aluminum alloy 7075-T651 can support at an applied stress of: (a) three-quarters of the yield strength, and (b) one-half of the yield strength Assume Y = 1. Given: KIC = 24.2 MPa (sq. rt.(m) and σys = 495 MPaDescribe the stress-strain behavior?What is the difference in appearance between ductile & brittle fractures?
- A metallic rod with an initial diameter of 10 mm and an initial length of 50 mm is subjected to the tensile test. After the fracture, the final length was measured as 51.8 mm, and the final diameter was measured as 9.5 mm.(a) Calculate modulus of elasticity, ultimate tensile strength, elongation at fracture in %,reduction of area in %, true stress at maximum load, true strain at maximum load, strain hardening exponent, strength coefficient.?A low-nickel steel in the heat-treated condition had an 'engineering' tensile strength of 708 N/mm2. The reduction in area of cross-section at the fracture was 44%. What was the true tensile strength of the steel?Sketch Figure 1.3, curve b (a ductile metal). Label it with the following terms, indicating from which location on the curve each quantity can be identified or extracted: elastic region, plastic region, proportional limit, tensile strength, onset of necking, fracture stress.
- Briefly describe the metallographic procedure. Briefly explain the ASTM grain-size standard. Draw a stress-strain curve for a ductile metal and mention plastic region and 5 important parameters (or points) in your curve. Additionally, explain these parameters (if necessary provide the corresponding equations). Briefly describe the necessities of a compression test for some materials. Explain the reason that buckling happens during the compression test. Explain the Izod impact test. Explain the Brinell hardness test. Explain the creep test. Design and explain fatigue test setup for a crankshaft. Explain the salt spray test in corrosion testsFind the tensile toughness for a metal alloy with modulus of elasticity of 103 ???. Assume the plastic deformation begins at a strain value of 0.007 and fracture occurs at a strain value of 0.60. Assume also that fracture occurs at the point where necking begins and that the Κ and ? values are 1520 ??? and 0.15 respectively.Define the term Uniaxial stress?