49Questions of Lect...Questions of Lecture Five:01) Define the following:1) The stress & the strain2) Mechanical stress and mechanical strain3) yield strength and tensile strength4) Modulus of elasticity and the strain hardeningQ2)) Fill the following blanks:1)) Tensile tests are used to3)) The must application tests of applied static stresses to which muterials can besubjected are ---------- ------, --------.4)) Tensile stresses cause ----------,stresses -----, of the material.5)) Engincering stress-strain is important in -----important in ------.6)) The unit of mechanical stress is ---------- or ----------, while the unit of strain isand compressive stresses -----, while shear---, while the truc stress-strain is---------.7)) In compression test, when specimen is compressed, its height is ---------, and itscross-sectional arca is ------.8)) Compression is in contrast to the tensile, the compression test contributes to the---------- in stress with ---------, elongation.9)) The hardness test measures ---------10)) There are several methods of hardness test, such as:11)) Hardness Test can be found in different scales, such as:12)) The impact test describes the ---------, and it often used to evaluate ------- of------------------------.---------------- -the material.13)) There are many impact test types including the --------- test and ---------- test.14)) The ASTM standards means ----------, and ISO standards means ----------.Q3)) Draw the sketch of engineering and true stress-strain curves.Q4) Answer the following briefly:A)) What the benefit of understanding the mechaneical properties of the material?B)) Write the equation of the following:Engineering stress, True stress, Engineering strain, True strain, modulus of elasticityC)) Write the equation to explain the relationship between stress and strain in the elasticand plastic regions?D)) Why the engineering stress-strain results are important in the design, while the truestress-strain results are important in the manufacturing.E)) Explain meganism of tensile test?F)) There are two different types of stress-strain curves; what are they, explain briefly?G)) What is the means of the yield point in stress-strain curve, explain briefly?H)) The process of bending subjects the material to various stresses, explain briefly?I)) Explain the applied load and the indentor type used in the hardness test for the following:Brinell Hardness Test (BHN), Rockwell Hardness Test (HR).Vickers Hardness Test (HV). Knoop Hardness Test (HK).J)) Describ the meganism of impact test briefly?『 -ー一マー一一一一一一

Question

49Questions of Lect...Questions of Lecture Five:01) Define the following:1) The stress & the strain2) Mechanical stress and mechanical strain3) yield strength and tensile strength4) Modulus of elasticity and the strain hardeningQ2)) Fill the following blanks:1)) Tensile tests are used to3)) The must application tests of applied static stresses to which muterials can besubjected are ---------- ------, --------.4)) Tensile stresses cause ----------,stresses -----, of the material.5)) Engincering stress-strain is important in -----important in ------.6)) The unit of mechanical stress is ---------- or ----------, while the unit of strain isand compressive stresses -----, while shear---, while the truc stress-strain is---------.7)) In compression test, when specimen is compressed, its height is ---------, and itscross-sectional arca is ------.8)) Compression is in contrast to the tensile, the compression test contributes to the---------- in stress with ---------, elongation.9)) The hardness test measures ---------10)) There are several methods of hardness test, such as:11)) Hardness Test can be found in different scales, such as:12)) The impact test describes the ---------, and it often used to evaluate ------- of------------------------.---------------- -the material.13)) There are many impact test types including the --------- test and ---------- test.14)) The ASTM standards means ----------, and ISO standards means ----------.Q3)) Draw the sketch of engineering and true stress-strain curves.Q4) Answer the following briefly:A)) What the benefit of understanding the mechaneical properties of the material?B)) Write the equation of the following:Engineering stress, True stress, Engineering strain, True strain, modulus of elasticityC)) Write the equation to explain the relationship between stress and strain in the elasticand plastic regions?D)) Why the engineering stress-strain results are important in the design, while the truestress-strain results are important in the manufacturing.E)) Explain meganism of tensile test?F)) There are two different types of stress-strain curves; what are they, explain briefly?G)) What is the means of the yield point in stress-strain curve, explain briefly?H)) The process of bending subjects the material to various stresses, explain briefly?I)) Explain the applied load and the indentor type used in the hardness test for the following:Brinell Hardness Test (BHN), Rockwell Hardness Test (HR).Vickers Hardness Test (HV). Knoop Hardness Test (HK).J)) Describ the meganism of impact test briefly?『 -ー一 マー一一一一一一

Accepted Answer

Define the Following
The stress and the strain
Yield strength
Tensile Strength
Modulus of elasticity…

Q1) Define the following: 1) The stress & the strain 2) Mechanical stress and mechanical strain 3) yield strength and tensile strength 4) Modulus of elasticity and the strain hardening