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Sarkari MCQs Government Exam Question Bank
Question no. 8415

Fibrous fractures typically occur within ____________________ materials?

Select your answer for: Fibrous fractures typically occur within ____________________ materials?
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Answer: C. Ductile

Explanation

Ductile materials undergo extensive plastic deformation and necking before final structural failure occurs. Microscopic void nucleation and coalescence during plastic deformation produce rough fibrous fracture surfaces. Cup-and-cone visual appearances characterize the ductile tensile failure mode in structural metal specimens. Mechanical testing classifies material fracture surfaces into brittle cleavage types and ductile fibrous types. Plastic deformation represents permanent non-reversible straining beyond the elastic limit of metals. Ductility allows materials to absorb significant impact energy before breaking under applied loads.

Metallurgical failure analysis utilizes fracture surface examination to determine the root cause of component breakdowns. Engineering structures are preferentially built from ductile materials to provide visible warning before catastrophic failure. Manufacturing processes like forging and drawing rely heavily on the plastic ductility of metallic materials. Hard materials often exhibit high strength but can fail in brittle manners without significant plastic deformation. Elastic materials bounce back to original dimensions and do not form permanent fibrous fracture surfaces. Brittle materials fracture suddenly along cleavage planes with little deformation, resulting in granular surfaces.

Subject
Engineering
Category
Chemical Engineering
Topic
—
Difficulty
medium

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