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Which of the following property is desirable in parts subjected to shock and impact loads?
  • a)
    Strength
  • b)
    Stiffness
  • c)
    Brittleness
  • d)
    Toughness
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Which of the following property is desirable in parts subjected to sh...
Toughness is the property of a material that enables it to absorb and distribute within itself relatively large amounts of energy (both stresses and strains) of repeated impacts and shocks and undergo considerable deformation before fracturing or failing.
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Which of the following property is desirable in parts subjected to sh...
Impact loads refer to sudden and high-intensity forces acting on a part or material. These loads can cause deformation, fracture, or failure of the part if it is not designed to withstand them. Therefore, it is essential to consider certain properties of materials when selecting them for parts subjected to shock and impact loads. Among these properties, toughness is the most desirable.

Toughness is the ability of a material to absorb energy before fracture. It is a combination of strength and ductility. When a part is subjected to impact loads, it experiences high-stress concentrations and rapid loading rates. The material must be able to withstand these conditions without fracturing. Here's why toughness is important in such situations:

1. Absorbing Energy: When a part is subjected to an impact load, it undergoes deformation and absorbs energy. The toughness of a material allows it to absorb this energy without fracturing. Materials with high toughness can dissipate the impact energy over a larger volume, reducing the risk of fracture.

2. Resistance to Crack Propagation: Impact loads can create cracks and propagate them through the material. Tough materials have the ability to resist crack propagation. This is crucial in preventing catastrophic failures and ensuring the longevity of the part.

3. Ductility: Tough materials exhibit higher ductility, which means they can undergo plastic deformation before fracturing. Ductility allows the material to deform and absorb energy, rather than experiencing sudden and brittle failure. This helps prevent fractures and enhances the overall durability of the part.

4. Reducing Vibrations: Impact loads can also generate vibrations in the part. Tough materials have the ability to dampen these vibrations, reducing the risk of fatigue failure. Vibrations can cause stress concentrations and weaken the material over time. By absorbing energy and reducing vibrations, toughness helps improve the fatigue life of the part.

In summary, toughness is a highly desirable property in parts subjected to shock and impact loads. It allows the material to absorb energy, resist crack propagation, exhibit ductility, and reduce vibrations. These characteristics help prevent fractures, enhance durability, and ensure the long-term performance of the part.
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Which of the following property is desirable in parts subjected to shock and impact loads?a)Strengthb)Stiffnessc)Brittlenessd)ToughnessCorrect answer is option 'D'. Can you explain this answer?
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