신장계에 의한 소성변형비 자동측정법의 평가에 관한 연구A Study on the Evalution of the Automatic Measurement Method of Plastic Strain????? Ratio by Two Extensometers
- Other Titles
- A Study on the Evalution of the Automatic Measurement Method of Plastic Strain????? Ratio by Two Extensometers
- Authors
- 김인수
- Issue Date
- 2003
- Publisher
- 한국소성가공학회
- Keywords
- Plastic Strain Ratio; R-Value; Automatic Measurement Method; Tensile Test; Extensometer; Direct Method; Indirect Method; Plastic Strain Ratio; R-Value; Automatic Measurement Method; Tensile Test; Extensometer; Direct Method; Indirect Method
- Citation
- 소성가공, v.12, no.5, pp 504 - 512
- Pages
- 9
- Journal Title
- 소성가공
- Volume
- 12
- Number
- 5
- Start Page
- 504
- End Page
- 512
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/22062
- ISSN
- 1225-696X
2287-6359
- Abstract
- The plastic strain ratios(R-values) of low carbon steel sheets were determined by the automatic strain measurement method using two extensometers, the indirect photo method for the same tensile specimen during tensile test and the indirect method for the specimen after tensile test. The experimental results showed that the measured plastic strain ratios from the automatic strain measurement method using two extensometers coincided with those from the indirect photo method and the indirect method for all tensile specimens. In addition, the strain dependence of plastic strain ratios could be continuously recorded and the anisotropy of the strength coefficient, K, and strain hardening exponent, n, could be automatically calculated in three directions by computer through the use of two extensometers. The experimental results showed that the strain dependence of R-value was related to the anisotropy of strain hardening exponent in low carbon steel sheets.
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