Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 29 views

    Forming Aptitude Test - Sanfoundry

    Uploaded by

    rahma
    This document discusses the relationship between tensile and shear yield stress through a series of true/false questions and explanations. It covers topics like tensile strength, mechanical properties, necking phenomenon, stress and strain, ductility, engineering stress, shear stress-strain relationship, and brittle materials. The key points are that tensile strength is the ability to resist axial loads, mechanical properties determine material behavior, necking only occurs in tensile testing, stress depends on load and area while modulus is a material property, ductility measures strain before failure, and brittle materials fracture without yielding.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Forming Aptitude Test - Sanfoundry

    Uploaded by

    rahma
    29 views4 pages
    This document discusses the relationship between tensile and shear yield stress through a series of true/false questions and explanations. It covers topics like tensile strength, mechanical properties, necking phenomenon, stress and strain, ductility, engineering stress, shear stress-strain relationship, and brittle materials. The key points are that tensile strength is the ability to resist axial loads, mechanical properties determine material behavior, necking only occurs in tensile testing, stress depends on load and area while modulus is a material property, ductility measures strain before failure, and brittle materials fracture without yielding.

    Original Description:

    Analysing Results and Assessing Validity

    Copyright

    © © All Rights Reserved

    Available Formats

    PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    This document discusses the relationship between tensile and shear yield stress through a series of true/false questions and explanations. It covers topics like tensile strength, mechanical properties, necking phenomenon, stress and strain, ductility, engineering stress, shear stress-strain relationship, and brittle materials. The key points are that tensile strength is the ability to resist axial loads, mechanical properties determine material behavior, necking only occurs in tensile testing, stress depends on load and area while modulus is a material property, ductility measures strain before failure, and brittle materials fracture without yielding.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    29 views4 pages

    Forming Aptitude Test - Sanfoundry

    Uploaded by

    rahma
    This document discusses the relationship between tensile and shear yield stress through a series of true/false questions and explanations. It covers topics like tensile strength, mechanical properties, necking phenomenon, stress and strain, ductility, engineering stress, shear stress-strain relationship, and brittle materials. The key points are that tensile strength is the ability to resist axial loads, mechanical properties determine material behavior, necking only occurs in tensile testing, stress depends on load and area while modulus is a material property, ductility measures strain before failure, and brittle materials fracture without yielding.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 4

    Forming Questions and Answers – Relationship

    between Tensile and Shear Yield Stress


    This set of Forming Questions and Answers for Aptitude test focuses on “Relationship between Tensile
    and Shear Yield Stress”.

    1. Tensile strength of a material is the ability of a material to resist the lateral load without failure.
    a) True
    b) False

    View Answer

    Answer: b
    Explanation: Tensile strength of any material is defined as the ability of a material to resist axial o
    centric load without failure, it is mainly determined by performing tensile test. When equal and
    opposite forces are applied to the material simultaneously that axially pulls the material, which
    further causes elongation of the material by decrease in its diameter.

    advertisement

    2. The behaviour of the material is generally determined by its mechanical properties.


    a) True
    b) False

    View Answer

    Answer: a
    Explanation: The behaviour of the material is generally determined by its mechanical properties
    when a material is subjected to different loading conditions like tensile load, compressive load etc
    then properties like young’s modulus, various strengths, toughness, ductility etc. are determined
    which are very important in design and manufacturing.

    3. The necking phenomenon of material can be observed in tensile test as well as in compression test.
    a) True
    b) False

    View Answer

    Answer: b
    Explanation: When an axial load is applied to the material, the material first elongates, then necking
    occurs and the fracture is produced. The necking phenomenon is only occurring in the tensile tes
    due to the elongation of material, a neck like structure is formed. Its behaviour generally depends on
    the material used for the test. Necking does not take place in brittle materials.

    4. The induced stress in the material and the young’s modulus, both are the properties of the material.
    a) True
    b) False

    View Answer

    Answer: b
    Explanation: When a material is subjected to any load then the stress is induced in the material which
    is not a material property, it basically depends on the load applied and the cross-sectional area of the
    material. And young’s modulus is a material property which indicates stiffness of the material and i
    is different for different materials.

    5. When material subjected to load then elongation becomes more faster beyond the yield point.
    a) True
    b) False

    View Answer

    Answer: a
    Explanation: Beyond the yield point, as the load increases, elongation of material proceeds at a faste
    rate than before. This part of stress strain curve is called as hardening region. When the load reaches
    a maximum value, the engineering stress at this point is called as the tensile strength or ultimate
    tensile strength of the material.

    Join Sanfoundry@YouTube
    6. Necking is a localized elongation through which the load carrying capacity of material increases
    beyond its tensile strength.
    a) True
    b) False

    View Answer

    Answer: b
    Explanation: In the stress-strain curve, beyond the tensile strength, the load carrying capacity reduce
    and the test material goes through a localized elongation called necking. There is no any constan
    strain in this region and the elongation occurs in one small segment of specimen. The stress
    measured just before the failure is known as the fracture stress.

    7. The amount of strain that the material sustains before failure is a property which is called as ductility
    of the material.
    a) True
    b) False

    View Answer

    Answer: a
    Explanation: When a material is subjected to a load, then the amount of strain that the materia
    sustains before failure is an important property which is called as ductility of the material. This
    property is very useful in manufacturing of machine products which works more dynamically than
    statically. The ductility is generally measured in terms of its area reduction.

    8. In the computation of engineering stress, the actual or instantaneous cross-sectional area is used.
    a) True
    b) False

    View Answer

    Answer: b
    Explanation: The original cross sectional area is used in the computation of engineering stresses. Bu
    in computation of true stresses, the instantaneous cross-sectional area is used. Because of the length
    and cross-sectional area both changes at every instant during loading of material. The instantaneous
    load divided by instantaneous cross-sectional area is called true stress.

    9. The relationship between the shear stress-strain is similar to the flow curve for plasticity of material.
    a) True
    b) False

    View Answer

    Answer: a
    Explanation: Shear stress basically involves an application of load parallel to the surface of material in
    the opposite direction. The relationship between the shear stress-strain is similar to the flow curve
    for the plasticity of material. The applied load always increases as the increase in its strain hardening
    then the material becomes much stronger and harder.

    advertisement

    10. The brittle material directly fractures without yielding when it reaches the ultimate strength
    material.
    a) True
    b) False

    View Answer

    Answer: a
    Explanation: The behaviour of the material is completely defined by its stiffness. Such materia
    directly fractures without yielding when it reaches ultimate strength material. These materials are
    called as brittle materials. Examples of brittle material are ceramics, cast iron, etc. These material
    are not suitable for forming operation, where permanent plastic deformation is required to get the
    final product.

    Sanfoundry Global Education & Learning Series – Casting, Forming and Welding.

    You might also like