What is Residual Stress?

Q: What are the factors that affect the ultimate choice of the material?

A: There are two important principles that should apply to materials for their ultimate choice:…

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: Describe how a brittle fracture occurs?

A: Brittle materials are those materials when subjected to stress fails without any sign of failure.…

Q: What are the mechanisms of strengthening?

A:

Q: How does torsional stress and angle of twist impact engineering design?

A: Importance of torsional stress in Engineering Design:- Torsional stress is induced in an element due…

Q: What is creep and stress rupture testing?

A: Creep and stress rupture testing: The creep and stress rupture testing is used to check the…

Q: What can be determined when looking at the hardness values? What about when it comes to material…

A: The hardness values shown in the image are obtained by performing a Vickers hardness test on four…

Q: Why may ultimate strength be greater than rupture strength?

A: The given problem is for ductile materials because for brittle materials there is no plastic…

Q: How is normal strain measured?

A: As we know that strain is a change in length over original length.

Q: What does the region of strain hardening cause?

A: The working of the metals below their  recrystallisation  temperature is known as cold working…

Q: which of the following will reduce the failure strength or lifetime of a test piece and why?…

A: Failure stress is an energy level that approaches a mechanism's failure threshold if failure is…

Q: How can we calculate the maximum stress?

A: Stress: Stress is defined as the developed force in the specimen per unit area when that specimen is…

Q: Why should the thermal stresses be considered in design?

A: The stresses generated due to rapid heating or cooling of the structure are known as thermal…

Q: What type of behaviour is observed from these stress-strain curves?

A: Consider the diagram shown below for the stress-strain curve. P: proportional limit Y: yield point…

Q: the 0.2% offset yield strength

A: Yield strength is a mechanical property of materials, specifically metals and alloys, that measures…

Q: Which material should be chosen when high strength is required

A: Given: To define: Which material should be chosen when high strength is required

Q: What is the permanent strain?

A: Strain: When a force is applied to any system, they deform based on the applied force. The…

Q: What is external force?

A: Answer : Force - It is an effect which changes or try to change the state of a body.

Q: Name the four basic bulk deformation processes.

A: Given:

Q: Why is it not necessary to use stress concentration factors if the material is ductile?

A: Stress concentration is a location in a member under load where the magnitude of stress is…

Q: How did temperature affect the toughness of C1045-CF, Cast Iron, and AL7075-T6

A: Ductility: The property of a metal by virtue if which it can be transformed into thin wires by the…

Q: What do the normal strains cause?

A:

Q: How can the fatigue be prevented?

A: Fatigue: Fatigue is the deformation material due to cyclic loads applied to it. This results in the…

Q: What is the tension and compression test?

A: Tension and compression test are preferred for determining material properties like elastic limit,…

Q: How is the Strain actually measured?

A: Before explaining the measurement of strain, let's first understand the strain. Strain is basically…

Q: What is the tensile strength of a metal if its endurance limit is 84675 psi?

A: Given that the endurance limit of the material is 84575 psi. Write the endurance limit formula,…

Q: What happens to the shear stress as flexural capacity increases?

A: It is the strength of any beam against transverse loads applied on them. It is given by 'EI', where…

Q: What is the hardest metal? What is it's Vicker's Hardness score?

A:

Q: Why should stress not exceed the material by design?

A: Every component is designed based on working stress which will acts on the component during its…

Q: What is the Strain Rosettes?

A: Strain rosette is the combination of three liner strain gauge placed in three direction. The measure…

Q: Please draw a typical tensile test curve for low carbon steels and mark the four stages and list…

A: For the solution refer below images.

Q: 5) Draw the stress-strain curve and gives the stress and strain equations for both Engineering and…

A:

Q: What material and corresponding stresses is best for HP shape?

A:

Q: What is the linear variation in the shear strain?

A: The change in shape obtained due to shear stress is defined by shear strain.

Q: Describe how a ductile fracture comes about?

A: Answer : Ductile Material are those materials that go through substantial plastic deformation before…

Q: What is the true sliding strain for a low carbon steel bar which is doubled

A: Given:Low carbon steel

Q: What are the three equations of flexural rigidity?

A: Flexural Rigidity  It defined as the resistance offered by structure while undergoing bending or it…

Q: What would be the result of the Yielding of the material?

A: In stress-strain curve of material the yield point is the point of elasticity. Yield points shows…

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

A:

Q: Can the yield point of material be increased by strain hardening?

A: The strain hardening process is known as the Work hardening. This operation is carried out below the…

Q: How is Dilatation, or volumetric strain caused?

A: Dilatation or volumetric strain: The volumetric strain or dilatation is defined as the change in…

Q: True of False? The property of material by which it can withstand extensive deformations without…

A: The property of material by which it can withstand extensive deformations without failure, under…

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.