Fatigue cracks may happen due to weakening of surface layer in hot working. Select one: True False

Q: What is elongation testing?

A: Elongation testing is a measure of far stretching of a sample before it breaks. The result is…

Q: a) Draw the stress strain curves for metals, polymers and ceramics?

A: Given Data⇒   Stress-strain curve for metal, polymers, and ceramics

Q: Describe how a brittle fracture occurs?

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

Q: Is the maximum shear stress theory is based on the idea of slipping that occurs in ductile failure?

A: The maximum shear stress theory also known as Guest and Tresca's theory states that the failure of a…

Q: Describe the general trends that connect stress level and temperature with steady-state creep rate…

A: Creep is a kind of deformation seen in the material subjected to cyclic loading. The gradual slow…

Q: When a material is subjected to repeated stresses it will not fail without any prior indications.

A: When we apply repeated load on a material, then the properties or strength of the material will…

Q: Differentiate between normal strain measures and sheer strain measures?

A: Normal Strain: The deformation caused in normal strain is due to normal forces such as tension or…

Q: 2) What non-destructive testing methods use for metals with surface cracks (micro size)? Explain…

A: NON-DESTRUCTIVE TESTING ARE LIQUID PENETRATE TEST, ACOUSTIC TEST, MAGNETIC PARTICLE TESTING,…

Q: What is the small strain analysis in the engineering design?

A: When a body is subjected to any tensile or compressive forces then the body undergoes deformation…

Q: How can the ductility of material be specified?

A: Ductility is the material’s property to undergo large plastic deformation (permanent type) after the…

Q: Do the irregularities vary from specimen to specimen in tensile fracture?

A: The tensile strength of the same specimens can be identical, but the surface irregularities are not…

Q: On a stress strain curve for structural steel, show various points like proportional limit, elastic…

A: Objective: To draw the stress-strain curve for steel, show points like proportional limit, elastic…

Q: How does point defect affects the property of a material?

A: To find : How does point defect affects the property of a material

Q: What visual evidence supports the presence of significant grain boundary sliding in many creep…

A: Irregular atomic bed displacement occurred due to grain boundary sliding. These displacements of…

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: a) Distortion energy theory is mainly for the torsion failure analysis. True False b) The fracture…

A: (a) Distortion Energy theory states that, the yielding of a material will takes when distortion…

Q: (C) A plain sided specimen is subjected to 2 * 107 cycles at the applied stress range of 100 MPa.…

A:

Q: State and explain the theories of failures applicable to  Brittle material.

A: The theory of failure applicable to brittle material is maximum principle stress theory or ranking…

Q: The energy absorbed during the fracture of notched specimen is related to the area under the…

A: Solution:

Q: 7) Explain the concept “wide spread fatigue damage”, its origin and consequences. Give an example of…

A: Widespread fatigue damage (WFD) in a structural failure. It is signified by the occurrence of…

Q: What is the relationship factor between the fatigue test and any other mechanical property (tensile…

A: given; What is the relationship factor between the fatigue test and any other mechanical property…

Q: 11. List the conditions that can induce brittle failure even in a ductile material.

A: Conditions that can induce brittle failure even in a ductile material- 1. High Strength Material are…

Q: Q1: Comparison between behaviors of brittle and ductile metal of stress- strain curve?

A: we are to compare stress strain relationship in ductile and brittle materials

Q: 2. Which of the following are responsible for residual stress and distortion?

A: Residual stresses are the stresses in the material remains in the material after the removal of the…

Q: Impact test is Testing fracture characteristics under high strain rates Select one: True False

A: the given statement is true.

Q: Which metal often does not have a well-defined yield point and which procedure is suitable to yield…

A: Answer : Yield point : It is defined as that point after which material does not regain its original…

Q: Ductile and brittle fracture (what are they, how do they look under microscope)

A: Ductile fracture is a type of fracture characterised by a broad plastic deformation or "necking."…

Q: Why are cracks & notches prone to fracture propagation?

A: For any kind of crack or rapture in an object, there multiple factors that bring about failure.…

Q: What is true stress and true strain?

A: To define: True stress True strain Stress: It is defined as the internal resistance developed at a…

Q: Describe how a ductile fracture comes about?

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

Q: Consider the tensile stress strain curves in Figure 8-20 labeled 1 and 2 and answer the following…

A: (a) Work hardening is a process used in order to increase the hardness of the workpiece by…

Q: Q12. How would a creep profile on a brittle material looks like?

A: How would be creep profile on a brittle material.

Q: Description of stress- strain curve in brittle metal

A: Stress strain curve: In strength of material or material science, this curve will shows the relation…

Q: Brittle materials have less impact strength compared to ductile materials. Select one: True False

A: Given :-  Brittle materials have less impact strength compared to ductile materials  True  False

Q: 6) Chapter 3: Problem 3.7: (USCS Units) The flow curve for a cestain metal has a strain-hardening…

A: Given data: n=0.2k=26000 lb/in2 Need to determine the flow stress and rue strain.

Q: The stress element corresponds to a point under a flat stress state, on the surface of a part made…

A: For the given stress element  if yield strength (Sy) is 700 MPa   To determine  (a) f.o.s according…

Q: 1- What is the shape of the effect produced in the Brinell scale hardness test? 2- Where can the…

A: Note: This is a multi-part question. According to Bartleyby's policy, we shall answer only three…

Q: On a stress strain curve for structural steel, show various points like proportional limit, elastic…

A: Proportional limit On the stress strain curve a point under which the stress acting on the specimen…

Q: Why does the tensile fracture occur suddenly?

A: Fracture is defined as separation of an object into two more pieces under the application of load.…

Q: How we can measure shear modulus?

A: Shear modulus or modulus of rigidity can be found from the torsion test. As a result of the twisting…

Q: Table 4 shows the fatigue data of a ductile cast iron to be used for an automobile axle that rotates…

A: a)

Q: a component is made of 6061 T6 aluminum sheet LT. A axial tensile stress of 50 ksi is applied at…

A: The deformation of a material in response to a tensile, compressive, or torsional force is…

Q: 28 - The strength coefficient and strain-hardening exponent of a certain test metal are 700 MPa and…

A: When metal is deformed such that it exceeds its yield strength, then strain-hardening occurs, and…

Q: Why does the brittle fracture occur in a torsion test?

A: Brittle fracture occurs in torsion test. Brittle fracture occurs mainly when there is sudden failure…

Q: A) What are the two conditions for causing a part to break by crack propagation? Are the following…

A:

Q: Given your understanding of what initiates and controls failure in materials, which of the following…

A: The life time is the most important part of the machine element. More the life time of the element…

Q: 5) Which of the following statement(s) is/are correct? i. The lower temperature limit for…

A: Both the statements are correct

Q: Qu2. (A) What is fatigue? Mention the sequence of steps involved in fatigue of a smooth specimen.…

A: When material is subjected to repeated stress, it fails at stress below the yield point stress. This…

Strain energy

The term strain indicates the variation in an object's length, area, and volume when the object is subjected to an external force. The external force may be of normal, shear, moment, torque, etc. The strain in an object depends on the types of external force and cross-section of the object. Mathematically, the evaluation of strain can be obtained with the help of elastic constants.