Paper 9.1 - Steel Innovations Conference 2013 Christchurch-Ver4.pdf
Paper 9.1 - Steel Innovations Conference 2013 Christchurch-Ver4.pdf
Paper 9.1 - Steel Innovations Conference 2013 Christchurch-Ver4.pdf
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Plastic Strain Determination<br />
Determine plastic strain in a deformed Structure<br />
• Strain gauges and extensometers – when deforming<br />
• Digital imaging – no pattern on beam<br />
• Magnetic Barkhausen Noise – not developed<br />
• Hardness Test – material must work harden<br />
- Rockwell & Leeb (portable) Hardness Testers<br />
- Hardness tests show scatter<br />
- Method has established use in Nuclear Industry<br />
- <strong>Steel</strong> deformed to various plastic strains<br />
hardness measured<br />
hardness correlated with either strain or flow stress
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