Question

________ represents the failure of the material when subjected to the cyclic load.

• A. Fatigue
• B. Creep
• C. Toughness
• D. Elasticity

Hint:

Remember the diagnostic keywords: - Cyclic Repeated loading $\rightarrow$ Fatigue.
- Constant load High temperature Time-dependent $\rightarrow$ Creep.
- Energy absorption $\rightarrow$ Toughness.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
In food engineering and materials science, evaluating how processing equipment and structural metals respond to mechanical stresses is critical to prevent mechanical failure.
Detailed Explanation:
Let us review the definitions of the mechanical phenomena listed in the options:
- Fatigue (A): The progressive structural damage and eventual failure of a material subjected to repeated, fluctuating, or cyclic loading.
Under cyclic stress (even when the stress level is well below the material's static yield strength), microscopic cracks initiate, propagate over time, and eventually cause sudden structural failure.
- Creep (B): The slow, progressive, and permanent plastic deformation of a material when subjected to a constant mechanical stress over a long period at high temperatures.
- Toughness (C): The ability of a material to absorb energy and deform plastically before fracturing.
- Elasticity (D): The property of a material to return to its original shape and dimensions after the deforming force is removed.

Step 2: Final Answer:
The failure of a material under cyclic loading is defined as Fatigue.