Corrections and comments on the paper, “Nonlinear fracture mechanics”

Burns, S. J.; Pollet, J.-C.; Chow, C. L.

doi:10.1007/bf00037840

Int J Fract

1979

DOI: 10.1007/bf00037840

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Corrections and comments on the paper, “Nonlinear fracture mechanics”

S. J. Burns

J.-C. Pollet

C. L. Chow

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Discussion: ?J integral analysis of stable crack growth,? by I.-H. Lin, J. P. Hirth, and A. R. Rosenfield

Burns

1980

Int J Fract

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A method for deducing the J crack driving force value versus crack extension curve, the J_ curve, during stable crack growth has recently R been reformulated by L1n, et al. This new proposed relation for J is intended to apply to rectangular bend beams with a through thickness crack subject to bending only.It is shown here that in general, the proposed, reformulated J relationship applies only to a very restricted class of test specimens -constant J specimens.Linear elastic, deeply notched and unstable, non-linear elastic bend beams are not constant J test specimens. The proposed reformulated J relationships which involve measurable bending moments, conjugate angular rotations, and crack extensions will not apply to bend beams since in these test pieces both J and the bending moment may not, in general, be held constant simultaneously while the crack extends. 3 JM--~ c c[~t JouY~ of F r a o t ? x r e 16 ( 1 9 8 0 )

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Discussion: ?J integral analysis of stable crack growth,? by I.-H. Lin, J. P. Hirth, and A. R. Rosenfield

Burns

1980

Int J Fract

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Corrections: Discussion: “J Integral Analysis of Stable Crack Growth,” by I.-H. Lin, J. P. Hirth, and A. R. Rosenfield

Burns

1981

Int J Fract

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A method for deducing the J crack driving force value versus crack extension curve, the JR curve, during stable crack growth has recently been reformulated by Lin, et al. This new proposed relation for J is intended to apply to rectangular bend beams with a through thickness crack subject to bending only.It is shown here that in general, the proposed, reformulated J relationship applies only to a very restricted class of test specimens -constant J specimens. Linear elatic, deeply notched and unstable, non-linear elastic bend beams are not constant J test specimens.The proposed reformulated J relationships which involve extensions will not apply to bend beams since in these test pieces both J and the bending moment may not, in general, be held constant simultaneously while the crack extends. RI53-RI56.

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Corrections and comments on the paper, “Nonlinear fracture mechanics”

Cited by 2 publications

References 1 publication

Discussion: ?J integral analysis of stable crack growth,? by I.-H. Lin, J. P. Hirth, and A. R. Rosenfield

Discussion: ?J integral analysis of stable crack growth,? by I.-H. Lin, J. P. Hirth, and A. R. Rosenfield

Corrections: Discussion: “J Integral Analysis of Stable Crack Growth,” by I.-H. Lin, J. P. Hirth, and A. R. Rosenfield

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