What should be the basis in comparing the strength of two different materials? The applied load or working stress? Explain.

Q: Which material/metal is the stiffest based on the following data provided and why?

A: Concept: 1) Stiffness is ability of material to resist deformation against applied load.  2) For the…

Q: How do you increase the hardness of components being made from 0.8% carbon steel? Explain the…

A:

Q: Describe the mechanical properties of the materials?

A: The important mechanical properties of materials are: a.Strength: It is the property of a material…

Q: List at least three other names for the material derivative, and write a brief explanation about why…

A: The material derivative is explained as the time rate change of physical quantities like momentum or…

Q: Explain the role of mechanical properties in load-bearing applications using real-world examples

A: Examples of load-bearing applications are a car traveling on the road, the human body, aircraft, and…

Q: Explain EXTERNAL WORK AND STRAIN ENERGY?

A: External work: Work is said to be done when energy created by all the processes taking place inside…

Q: Please elaborate the following: Typical stress-strain characteristics of steel in simple tension and…

A: Characteristics of Stress Strain  Mechanical Properties

Q: Define the hardness of a metal and how is the hardness of a material determined by a hardness…

A: Hardnesss :- Hardness is defined as the ability of the material to resist deformation under the…

Q: List three engineering components / applications that, in your judgment, need high stiffness and low…

A: Specific stiffness is the ratio of the young modulus of the object to the density of the object.…

Q: Explain why the behaviour of materials is considered such an important factor when selecting a…

A: In the process of material selection for a given product or application, the behavior of the…

Q: Q2: (A) A material has a yield stress of 300 MPa. What will the cross sectional area of the bar,…

A: Given Data: Yield Stress σyt=300 Mpa Force F=36000 N Cross sectional Area A=?

Q: Which factors affect the mechanical properties of a material under applied loads?

A:

Q: Give some examples of Ductile materials?

A: Ductile material, Ductile material is one which has considerable plastic (permanent deformation)…

Q: ) What is the relation between stress at the tension side and diameter of the fatigue test specimen?…

A: (a) Relation  between stress at the tension side and diameter of the fatigue test specimen (b) The…

Q: Both yield strength and ultimate tensile strength exhibit the ability of a material to withstand a…

A: the answer in second step

Q: In a typical engineering stress-strain diagram, stress keeps on increasing after yield point due to…

A: Stress Strain Curve is a graphical representation of the behaviour of a material when a load or…

Q: Define the term Stiffness? of materials?

A: Stiffness: Stiffness is a property of material due to which an object resists deformation when an…

Q: Why is fatigue generally less of a problem with ceramics and glasses than with metals and polymers?

A: Fatigue is defined as a mechanical failure in which material is failed under its yielding strength.…

Q: Draw a stress-strain curve for a low carbon steel and explain important points and regions in…

A: Given Material Low Carbon Steel Find Stress-strain curve

Q: What is fatigue loading? Explain why it is dangerous.

A: The initiation and propagation of the crack in a material due to cyclic loading is called as…

Q: How do you find yield strength of a material if distinct yield point is not found in the material…

A: If the distinct yield point is not found in the material stress strain graph then to find to find…

Q: A piece of aluminum is pulled in tension from its original length of 202 mm with a stress of 172…

A:

Q: For the same bar, if the engineering strains are 0.05 and 0.10 at engineering stresses of 200 and…

A: Given data: σ1=200 MPaσ2=220 MPae1=0.05e2=0.1

Q: Sketch an engineering stress-strain diagram for ceramics, metals and polymers indicating the level…

A: Draw the engineering stress-strain diagram for ceramics, metals and polymers.

Q: 2) a) Draw a stress-strain curve for a low carbon steel and an aluminum after tensile test. Show…

A: The stress strain curve of low carbon steel and aluminium can be drawn as below, Here, x-axis and…

Q: How can you assume the linear elastic behavior of a material?

A: Both linear and nonlinear elastic materials will elastically return to an “unloaded” state…

Q: Would you suggest conducting Rockwell-Type hardness tests on ceramic or polymeric materials? Why or…

A: Rockwell - Type are not suitable for ceramic materials.

Q: How does the resilience of this material compare to its toughness?

A:

Q: List the very basic mechanical properties of materials, and briefly explain how to measure.

A:

Q: Using a stress-strain diagram, analyze and compare the mechanical properties of cast iron, mild…

A: given; stress-strain diagram?

Q: 6. How do you increase the hardness of components being made from 0.8% carbon steel? Explain the…

A: We can increase the hardness of low carbon steel by the carburizing process.

Q: Calculate the maximum force that a o.2-in. diameter rod of Al2O3, having a yield strength of 35,000…

A: Given Data  D=0.2 in Yield strength=35000 psi

Q: Are the wedge grips suitable for tests of brittle materials? Explain

A:

Q: How are Engineering stress and strain calculated?

A: Engineering stress is also known as the nominal stress, defined as the ratio of applied load to the…

Q: Discussion : 1- Through the results of the experiment and graphs, what is the effect of the…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Give some examples of the Deformation of a body?

A: Deformation of bodies categorized into different types such as  1) Elastic deformation 2) Plastic…

Q: Draw an engineering stress-strain curve for a metal and explain the parameters obtained from this…

A: A Stress-Strain diagram is used to determine material behavior under load. It contains three…

Q: Discussion 1- Through the results of the experiment and graphs, what is the effect of the following…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: How do you think about the importance of the theory of elasticity and plasticity?

A: Elasticity - It is defined as the property of material which allow the material to regain its…

Q: If you have a material that is initially hard and strong, would you expect it to cyclically harden…

A: The strong as well as hard materials undergo cyclic softening. To determine how strong material can…

Q: Describe the behavior of tested materials (mild steel and aluminium) as it responds to increasing…

A: following is the answer to the above problem-

Q: How do you increase the hardness of components being made from 0.8% carbon steel? Explain the…

A: Solution:

Q: If a sample has a high modulus of elasticity, will the material exhibit a high degree of elasticity…

A: Yes , high value of modulus of elasticity means that material will exhibit high degree of…

Q: What is the expression for allowable stress in the case of ductile materials?

A: Allowable stress:  It is the maximum magnitude of the stress (tensile, compressive, shear) that a…

Q: How do you increase the hardness of components being made from 0.8% carbon steel? Explain the…

A: Solution:

Q: 1-Explain why flexural strength of brittle materials is always higher than tensile strength of the…

A:

Thermal Properties of Materials

In mechanical engineering, the thermal property is represented as the physical quantity that is relevant to the application of heat. The thermal properties are evaluated by variations in any specific material due to low heat or high heat. The quantities that influence the thermal property of the materials are mass, density, temperature, and many others.