Answer part A QUESTION ONE(a) Distinguish between physical and mechanical properties of materials. Give two examplesof each.(b) Explain why in a stress versus strain curve, the plastic portion of the graph after neckingtends to drop (ie the force drops) despite that the tension is increasing.(c) A tensile test uses a copper test specimen that has a gauge length of 80 mm and a di.ameterof 16 mm. During the test, the specimen yields under a load of 9,600 N. The correspondinggauge length is 80.24 mm. The maximum load reached is 148,000 N at a gauge lengthof 94.2 mm, while fracture happens at a load of 12,800 N and a gauge length of 102 6 mmDetermine the following:(i) Modulus of elasticity E(ii) Yield strength Oy(iii) Fracture strength, ơt(iv) Tensile strength OTs.1

Difference between physical and mechanical properties Physical properties The physical properties…

Answered: Distinguish between physical and…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Briefly comment on the values obtained for the Elastic Modulus, Yield Strength, Ultimate Strength and Toughness of the test specimen as compared to values of various comparable materials found in the literature. Is the test material comparatively strong? Is it stiff? Is it tough? Yield strength is 186Mpa, elastic modulus is 44.8GPa And the ultimate strength is 238.7mpa
Draw a typical stress vs strain tensile test curve for the following material and label the axis. A typical brittle material subjected to a tensile stress that has been applied to the material till the sample breaks. 1- label the axis and draw the curve for a brittle material. 2- indicate the maximum strength of the material. 3- show on the portion of the curve where young's modulus can be calculated.
Experiments were conducted in a tension testing machine to evaluate the material properties of two metallic rods both having diameter equal to 10 mm. First rod having modulus of rigidity of the material equal to 400 tonnes/cm2 when subjected to an axial tensile force of 6 kN, the change in its diameter was observed to be 0.0018 cm. The value for the bulk modulus of the second metallic rod is same as that of the first one but modulus of elasticity 18% more. Based on the material properties calculate and compare the values of different moduli as well as Poisson’s ratio for both metallic rods. Justify your answer with reasons.
Tensile test is a method to investigate the elasticity of a material. A test specimen is placed between two clamps and these clamps will move in opposite directions, hence straining the test specimen. This experiment will yield a stress-strain curve that shows each of the stages of the specimen for every load is applied. With an aid of sketching diagrams, describe the stages that the specimen experiences before it breaks, and relate it with the stress-strain curve. It is expected that each stage comes with a sketching of the specimen and explanation of the current stage.
10. A torsion test shows that the shear modulus of an aluminumspecimen is 4.6 x 106psi. When the same specimen is used in atensile test, the modulus of elasticity is found to be 12.2 x 106psi. Find the Poisson’s ratio for the specimen.
a) Compression tests are generally performed on brittle materials-why?b) How a cast iron specimen fails under compression load?c) Define secant modulus?
Tensile test under 40,000 N load was applied to a low carbon steel with a sample diameter of 6 mm. As the diameter of the specimen under load decreases to 5 mm, calculate a) Engineering stress and% elongation values, b) Actual stress and% elongation values.
A tensile specimen is elongated to twice its original length. Determine the engineering strain and true strain for this test? If the values are different explanations why they are different?
A cylindrical specimen of brass that has a diameter of 21 mm, a tensile modulus of 122 GPa, and a Poisson’s ratio of 0.37 is pulled in tension with force of 38704 N. If the deformation is totally elastic, what is the strain experienced by the specimen?
A three-point bending test is performed on a silicon carbide block that is 10 cm long, 1.5 cm wide, and 0.6 cm thick, and that is supported by two separate supports.7.5 cm. The sample breaks when a bending of 0.09 mm is recorded. The flexural modulus of silicon carbide is 480 GPa. Assume that no plastic deformation has occurred. Calculate: (a) The force that caused the fracture and(b) Flexural strength.
Suppose Polymethylmethacrylate (PMMA) and Polydimethylsiloxane (PDMS) have undergone tensile tests of similar settings at normal temperature and pressure conditions. With aid of a sketch, contrast their stress-strain responses.
The mechanical properties of a material can be determined by a simple strees strain test. Explain THREE (3) types of test that mostly conducted for metals at room temperature. Support your answer with the diagrams of material after deformation.

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Distinguish between physical and mechanical properties of materials. Give two examples of each.