Browse > Article
http://dx.doi.org/10.3795/KSME-A.2004.28.4.343

Design of δ5 Clip Gage for CTOD Measurement  

Park, Tai-Heoun (공주대학교 대학원 기계공학과)
Nahm, Seung-Hoon (한국표준과학연구원)
Kim, Am-Kee (공주대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.28, no.4, 2004 , pp. 343-351 More about this Journal
Abstract
The flaw assessment method based on ${delta}_5$ parameter was recently proposed and put to the practical use. However: since it is almost impossible to measure the ${delta}_5$ by the existing commercial clip gager, we need to develope the specially designed gages which are suitable for that purpose. In this research, a double cantilever type ${delta}_5$ clip gage with the traveling distance of 4mm was developed by the finite element analysis and the construction of Wheatstone bridge circuit including strain gages. The linearity of developed ${delta}_5$ clip gage was evaluated by the MTS extensometer calibrator with the proper adapters which allow the 6s clip gage to sit on the calibrator. Consequently, the 6s clip gage revealed the good linearity between the output voltage and the traveling distance of gage.
Keywords
CTOD; Clip Gage; Strain Gage; Finite Element Analysis; Displacement; EPFM;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 German M. D. et al., 1982, 'Elastic-Plastic Fracture Analysis of Flawed Stainless Steel Pipes,' EPRI Report NP-2608
2 Schwalbe, K. H. 1986, 'The Prediction of Failue Situations Using the CTOD Concept Based on the Engineering Treatment Model(ETM),' The Crack Tip Opening Displacement in Elastic-Plastic Fracture Mechanics Workshop on CTOD Methodology, Schwalbe, K. H. Rd., Springer Verlag, pp. 315-340
3 Heerens, J., Schwalbe, K. H., Nix, C., 1993, 'Influence of Specimen Size on J-, Jm- and ${\delta}_5$-R Curves for Side-Grooved Compact Tension Specimens,' Constraint Effects in Fracture, ASTM STP 1171, Hacket, E. M., Scwalbe, K. H. and Dodds, R. H., Eds., American Society for Testing and Materials, pp. 429-472
4 The Technical Staff of Measurements Group, Inc., 1988, Strain Gage Based Transducers Their Design and Construction, Measurements Group, Inc., Raleigh
5 Kim, C. Y., Song, J. H., 2002, 'Design, Construction and Use of A Displacement Gage for M(T) Specimens' Transactions of the KSME A, Vol. 26, No. 3, pp. 415-427   과학기술학회마을
6 Harrison, R. P.,Loosemore, L. jand Milne, I., 1976, 'Assessment of the Integrity of Structures Containing Defects,' CEGB Report R/H/R6
7 Gordon, J. R., Neale, B.K. and Wang,Y.Y., 1995, 'A Comparison of J and CTOD as Elastic-Plastic Fracture Characterization Parameters,' ASTM STP 1244, pp. 425-444
8 Rice, J. R., 1968, 'A Path Independent Integral and Approximate Analysis of Strain Concentration by Notches and Cracks', Int. J. of Applied mechanics, pp. 379-386
9 Bergley, J .A., and Landes,J.D., 'The J-Integral as a Fracture Criterion in Fracture Toughness', ASTM STP 514, pp. 1-23
10 Kim, A., Nahm, S.H., Jin, W. and Ko, S. W., 2000, 'Comparative Study on Crack Tip Opening Displacement ${\delta}_5$ R-Curve and ${\delta}_{BS}$ R-Curve,' Transaction of the KSME, A, Vol. 24, No. 3, pp. 794-802   과학기술학회마을
11 Hellmann, D. and Schwalbe, K. H., 1986, 'On the Experimental Determination of CTOD Based R-Curves,' The Crack Tip Opening Displacement in Elastic-Plastic Fracture Mechanics Workshop on CTOD Methodology, K. H, Rd., Springer Verlag, pp. 115-132