What variables are plotted on true stress-strain diagrams for engineering materials__________________?
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Answer: B. load/instantaneous cross-sectional area original area and log
Explanation
True stress-strain diagrams plot true stress based on instantaneous cross-sectional area against natural logarithmic strain increments. Using instantaneous area accounts for the continuous reduction in specimen cross-section during plastic tensile elongation tests. Natural strain accounts for incremental length changes relative to instantaneous length rather than original starting dimensions. Engineering stress-strain curves use original starting area and original length for simplified calculations in material testing. Plastic deformation causes metals to stretch and thin simultaneously, making instantaneous area measurements essential for true material behavior. True stress-strain data provides accurate scientific insights into metal work hardening behavior up to the point of fracture.
Original area and length plots generate standard engineering stress-strain diagrams rather than true material response curves. Using original area alongside logarithmic strain mixes different conventions, failing to capture true instantaneous stress accurately. Plotting instantaneous area against area ratios does not produce standard true stress-strain curves used in mechanical engineering.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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