The capacity of a material to absorb mechanical energy in the plastic deformation range is defined as its____________________?
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Answer: B. Toughness
Explanation
Toughness integrates both strength and plasticity into a single measure of energy absorption. The plastic deformation range allows materials to absorb large amounts of energy before fracturing. Calculating this energy capacity requires measuring the total area under the stress-strain curve. High toughness prevents sudden catastrophic brittle failure under severe mechanical loading. Ductile materials typically display high toughness because they undergo extensive plastic stretching. Charpy V-notch testing is a common empirical method used to evaluate impact toughness.
Structural components subjected to dynamic impact loads must possess high material toughness. Armor plating and heavy machinery parts rely on tough alloys to withstand severe shocks. Engineers balance hardness and toughness to ensure components do not crack under stress. Ductility measures the extent of plastic deformation in tension without quantifying absorbed energy. Creep is the slow permanent deformation of a material under constant stress over time. Resilience measures the capacity to absorb energy specifically within the elastic deformation range.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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