CLC number: O346.1+2
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2010-09-15
Cited: 6
Clicked: 5834
Chen Bao, Li-xun Cai. Estimation of the J-resistance curve for Cr2Ni2MoV steel using the modified load separation parameter Spb method[J]. Journal of Zhejiang University Science A, 2010, 11(10): 782-788.
@article{title="Estimation of the J-resistance curve for Cr2Ni2MoV steel using the modified load separation parameter Spb method",
author="Chen Bao, Li-xun Cai",
journal="Journal of Zhejiang University Science A",
volume="11",
number="10",
pages="782-788",
year="2010",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1000153"
}
%0 Journal Article
%T Estimation of the J-resistance curve for Cr2Ni2MoV steel using the modified load separation parameter Spb method
%A Chen Bao
%A Li-xun Cai
%J Journal of Zhejiang University SCIENCE A
%V 11
%N 10
%P 782-788
%@ 1673-565X
%D 2010
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1000153
TY - JOUR
T1 - Estimation of the J-resistance curve for Cr2Ni2MoV steel using the modified load separation parameter Spb method
A1 - Chen Bao
A1 - Li-xun Cai
J0 - Journal of Zhejiang University Science A
VL - 11
IS - 10
SP - 782
EP - 788
%@ 1673-565X
Y1 - 2010
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1000153
Abstract: Based on load separation theory, the load separation parameter Spb method is an effective approach for estimating the J-resistance curve from records of load versus displacement directly, using one sharp cracked specimen and an additional reference blunt cracked specimen. However, the effect of the reference blunt cracked specimen on J-resistance determination was not explicitly considered in past work. In this paper, a modified load separation parameter Spb method was developed to eliminate this effect, and then a unique estimation of instantaneous crack length for one sharp cracked specimen could be obtained. Furthermore, a forced blunting calibration method was also adopted to determine the instantaneous crack length in the load inseparable region, referring to a normalization method. Experiments on steam turbine rotator steel Cr2Ni2MoV were carried out to estimate J-resistance curves using an unloading compliance method. By removing unload and reload data from load-displacement records, the J-resistance curve for the same sharp cracked specimen was estimated using the modified separation parameter Spb method. The results indicate that the modified Spb method completely eliminates the effect of the reference blunt cracked specimen on the instantaneous crack length determination of the sharp cracked specimen. However, different J-resistance curves in a small range of crack extension are present when different blunting coefficients are used in the blunting line equation. The J-resistance curve obtained from the modified Spb method agrees well with that obtained from the compliance method.
[1]ASTM E1820-08a, 2008. Standard Test Methods for Measurement of Fracture Toughness. Annual Book of ASTM Standards, Vol. 3.01. American Society for Testing and Materials, Philadelphia, PA.
[2]Baldi, F., Riccò, T., 2005. High-rate J-testing of toughened polyamide 6/6: applicability of the load separation criterion and the normalization method. Engineering Fracture Mechanics, 72(14):2218-2231.
[3]BS7448-1997. Part 2: Fracture Mechanics Toughness Tests. Method for Determination of KIC, Critical CTOD and Critical J Values of Welds in Metallic Materials. British Standard Institution, London.
[4]Cassanelli, A.N., Ortiz, H., Wainstein, J.E., de Vedia, L.A., 2001. Separability Property and Load Normalization in AA 6061-T6 Aluminum Alloy. Fatigue and Fracture Mechanics, ASTM STP 1406, American Society for Testing and Materials, p.49-72.
[5]Dubey, J.S., Wadekar, S.L., Singh, R.N., Sinha, T.K., Chakravartty, J.K., 1999. Assessment of hydrogen embrittlement of Zircaloy-2 pressure tubes using unloading compliance and load normalization techniques for determining J-R curves. Journal of Nuclear Materials, 264(1-2):20-28.
[6]Dzugan, J., Viehrig, H.W., 2004. Application of the normalization method for the determination of J-R curves. Materials Science and Engineering: A, 387-389:307-311.
[7]Ernst, H.A., Paris, P.C., Rossow, M., Hutchinson, J.W., 1979. Anslysis of Load-displacement Relationships to Determine J-R Curve and Tearing Instability Material Properties. Fracture Mechanics, ASTM STP 677, American Society for Testing and Materials, p.581-599.
[8]Ernst, H.A., Paris, P.C., Landes, J.D., 1981. Estimations on J-Integral and Tearing Modulus T from a Single Specimen Test Record. Fracture Mechanics, ASTM STP 743, American Society for Testing and Materials, p.476-502.
[9]Herrera, R., Landes, J.D, 1988. A direct J-R curve analysis of fracture toughness tests. Journal of Testing and Evaluation, 16(5):427-449.
[10]Hu, J.M., Albrecht, P., 1991. Limit load solution and loading behavior of C(T) fracture specimen. International Journal of Fracture, 52(1):19-45.
[11]ISO 12135-2002. Metallic Materials—Unified Method of Test for the Determination of Quasistatic Fracture Toughness. International Organization for Standardization, Switzerland.
[12]Landes, J.D., Herrera, R., 1988. A new look at J-R curve analysis. International Journal of Fracture, 36:9-14.
[13]Landes, J.D., Zhou, Z., Lee, K., Herrera, R., 1991. Normalization method for developing J-R curves with the LMN function. Journal of Testing and Evaluation, 19(4):305-311.
[14]Morhain, C., Velasco, J.I., 2001. Determination of J-R curve of polypropylene copoly mers using the normalization method. Journal of Materials Science, 36(6):1487-1499.
[15]Salazar, A., Rodríguez, J., 2008. The use of the load separation parameter Spb method to determine the J-R curves of polypropylenes. Polymer Testing, 27(8):977-984.
[16]Sharobeam, M.H., Landes, J.D., 1991. The load separation criterion and methodology in ductile fracture mechanics. International Journal of Fracture, 47(2):81-104.
[17]Sharobeam, M.H., Landes, J.D., 1993. The load separation and ηpl development in precracked specimen test records. International Journal of Fracture, 59(3):213-226.
[18]Varadarajan, R., Dapp, E.K., Rimnac, C.M., 2008. Static fracture resistance of ultra high molecular weight polyethylene using the single specimen normalization method. Polymer Testing, 27(2):260-268.
[19]Wainstein, J., Vedia, L.A., Cassanelli, A.N., 2003. A study to estimate crack length using the separability parameter Spb in steels. Engineering Fracture Mechanics, 70(17):2489-2496.
[20]Wainstein, J., Frontini, P.M., Cassanelli, A.N., 2004. J-R curve determination using the load separation parameter Spb method for ductile polymers. Polymer Testing, 23(5):591-598.
[21]Zhu, X.K., 2009. J-integral resistance curve testing and evaluation. Journal of Zhejiang University-SCIENCE A, 10(11):1541-1560.
[22]Zhu, X.K., Joyce, J.A., 2007. J-resistance curve testing of HY80 steel using SE(B) specimens and normalization method. Engineering Fracture Mechanics, 74(14):2263-2281.
[23]Zhu, X.K., Lam, P.S., Chao, Y.J., 2009. Application of normalization method to fracture resistance testing for storage tank A285 carbon steel. International Journal of Pressure Vessels and Piping, 86(10):669-676.
Open peer comments: Debate/Discuss/Question/Opinion
<1>