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In a linearly hardening plastic material, the true stress beyond initial yielding

1. increases linearly with the true strain
2. decreases linearly with the true strain
3. first increases linearly and then decreases linearly with the true strain
4. remains constant

Correct answer: increases linearly with the true strain

Solution

In linearly hardening plastic materials, the true stress continues to increase proportionally with true strain after the initial yield point, reflecting the material's ability to strengthen as it deforms.

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