If the final lenght of materials is 10.1mm and its ductility is measured as 1 % in terms of elongation .what is its initial lenght
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If the final lenght of materials is 10.1mm and its ductility is measured as 1 % in terms of elongation .what is its initial lenght
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- Compare the engineering and true secant elastic moduli for the natural rubber in Example Problem 6.2 at an engineering strain of 6.0. Assume that the deformation is all elastic.A 40 mm diameter rod 6 m long elongates 12 mm under a load of 240 kN. The diameter decreased by 0. 028 mm during the loading. a.) Determine the Poisson’s ratio of the materials, b.) Determine the Young’s Modulus of the material, and c.) Determine the modulus of rigidity of the material.Which structural system is the most economical (material wise)? Why?Note: w, h1, h2 and L are equal for the three systems. EI is constant. w=50KN/m h1=4m h2=2m L=12m
- If an SFRS has an R-factor of 5 and an overstrength factor (Ω o) of 3, what is its approximate ductility capacity?A liquid compressed in a container has a volume of 1 liter at a pressure of 1 MPa and a volume of 0.995 liters at a pressure of 2 MPa. The bulk modulus of elasticity of the liquid is ans. 200MPaA cylindrical specimen of a hypothetical metal alloy is stressed in compression. If its original andfinaldiameters are 20.000 and 20.026mm, respectively, and its final length is 74.96 mm, compute its originallength if the deformation is totally elastic. The elastic and shear moduli for this alloy are 105 GPa and 39.7 GPa,respectively.
- A cube made of an alloy with dimensions of 50mm×50mm×50mm is placed intoa pressure chamber and subjected to a pressure of 80 MPa. If the modulus ofelasticity of the alloy is 200 GPa and Poisson’s ratio is 0.30, what will be thelength of each side of the cube, assuming that the material remains within theelastic region?For a material when tested within the elastic limit, the value of Poisson's ratio is 0.35. When the same material is tested in plastic stage, its Poisson's ratio in the plastic stage will be (a) 0.42 (b) 0.37 (c) 0.40 (d) 0.53A cylindrical specimen made of annealed 4135 steel has a diameter of 16 cm and is 12 cm high. It is upset, at room temperature, by open-die forging with flat dies to a height of 4.5 cm. Assuming that the coefficient of friction is 0.23, calculate the upsetting force (forging force) required at the end of the stroke. Take material properties, K=1015 MPa, n=0.17.
- A cylindrical metal bar with a diameter of 12.83 mm is applied to a load of 17.8 kN. This loadproduces a reduction in diameter of 7.62 μm. The deformation is purely elastic. Determine thePoisson’s ratio of this material if the elastic modulus is 103.4 GPa?Consider a cylindrical metal 6 mm in diameter and 50 mm long ispulled in tension. It is known that yield strength and elastic (Young’s) Modulus of thematerial are 200 MPa and 100 GPa, respectively, and its Poisson’s Ratio is 0.3.(a) Determine whether the deformation is elastic or plastic when 6000 N is applied.(b) Calculate specimen elongation (∆l) and reduction in diameter (∆d) when 5000 N isapplied? What are the values ∆l and ∆d when the load is released?(c) If necking occurs at a load of 8850 N, determine the UTS of the metal.(d) Calculate the ductility in terms of % E.L. if the length of the specimen at fracturepoint is 56.0 mm.Brinell Test A 10-mm diameter Brinell hardness indenter produced an indentation 1.62 mm in diameter in a steel alloy when a load of 500 kg was used. Compute the HB of this material. What will be the diameter of an indentation to yield a hardness of 450 HB when a 500 kg load is used?