Fibrous fractures occur within_____________?
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Answer: A. ductile material
Explanation
Fibrous fractures occur within ductile materials undergoing significant plastic deformation. The fracture surface appears dull, silky, and fibrous due to micro-void coalescence. Ductile metals stretch and neck down extensively before finally breaking under tension. Ductility is a material's ability to deform plastically before fracturing under tensile stress. Tensile testing reveals distinct fracture characteristics depending on whether the metal is ductile or brittle. Microscopic examination shows dimpled rupture patterns characteristic of fibrous ductile breaks.
Engineers prefer ductile materials for structural applications because they give visible warning before failing. Analyzing fracture surfaces helps forensic metallurgists determine the cause of mechanical failures. Structural steels used in bridges and buildings exhibit fibrous fractures under overload conditions. Option B refers to brittle materials, which fail suddenly with shiny, crystalline cleavage surfaces. Option C mentions elastic material, but elasticity describes reversible deformation rather than fracture type. Option D lists hard material, which is often brittle and prone to catastrophic cleavage fractures.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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