Crack growth and residual stress in Al-Li metal matrix composites under far-field cyclic compression

Hermann, R.

doi:10.1007/bf01153935

Cited by 13 publications

(11 citation statements)

References 16 publications

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“…The results in Fig. 5 show that the approximate solution derived by Reid 10 and applied several times in the literature [11][12][13] results in large errors for the residual stresses. In Reid's approximation, at each depth increment the remaining uncracked ligament is concep- tually separated from the cracked portion of the the geometry and the location of the strain measurement, but not on the residual stress distribution.…”

Section: Beam-bending Approximationmentioning

confidence: 97%

“…The technique is simple, requires only commonly available equipment, and has been applied several times to CT specimens. [11][12][13] However, the analysis relies on a beam-bending approximation that this study demonstrates to be significantly inaccurate.…”

Section: Introductionmentioning

confidence: 99%

“…Some additional effort, making use of realistic and important test case. [11][12][13]19,20 Figure 1 shows the standard CT specimen geometry the weight function, reveals the residual stress profile.…”

Section: Introductionmentioning

confidence: 99%

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Measuring residual stress and the resulting stress intensity factor in compact tension specimens

Prime

1999

Fatigue Fract Eng Mat Struct

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The measurement of residual stress through the remaining ligament of a compact tension specimen was studied. In the crack compliance method, a slot or notch is successively extended through the part, and the resulting strain is measured at an appropriate location. By using a finite element simulation of a specimen preloaded beyond yield, three techniques for determining the original residual stress from the measured strains were compared for accuracy and sensitivity to measurement errors. A common beam‐bending approximation was substantially inaccurate. The series expansion method proved to be very versatile and accurate. The fracture mechanics approach could determine the stress intensity factor caused by the residual stresses with a very simple calculation. This approach offers the exciting possibility of determining the stress intensity factor prior to a fatigue or fracture test by measuring strains during the specimen preparation.

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Section: Beam-bending Approximationmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Measuring residual stress and the resulting stress intensity factor in compact tension specimens

Prime

1999

Fatigue Fract Eng Mat Struct

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“…The results clearly demonstrated the effect of the preload magnitude. Hermann (1995) repeated these test on specimens of 8090 Al-Li reinforced with 17 vol% silicon carbide (Sic). The results again compared various preloads and also looked at specimens without the Sic reinforcement.…”

Section: Ival Through-thickness Stressesmentioning

confidence: 99%

“…Exceptions are Fett's (1987Fett's ( , 1996aFett's ( , 1996b applications to PMMA (Plexiglas) and PVC (polyvinyl chloride) and Hermann's (1995) application to metal matrix composites. Table 1 chronologically lists all of the experimental applications of the compliance method reviewed here.…”

Section: Review -Applicationsmentioning

confidence: 99%

Residual stress measurement by successive extension of a slot: A literature review

Prime¹

1997

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Ukl MSfRlBUTION OF THIS DOCUMENT I S UNLlMlTEb Los Alamos ABSTRACTThis report reviews the technical literature on techniques that employ successive extension of a slot and the resulting deformations to measure residual stress. Such techniques are known variously in the literature as the compliance or crack compliance method, the successive cracking method, the slotting method, and a fracture mechanics based approach. The report introduces the field and describes the basic aspects of these methods. The report then reviews all literature on the theoretical developments of the method. The theory portion first considers forward method solutions including fracture mechanics, finite element, analytical, and body force methods. Then it examines inverse solutions, including incremental inverses and series expansions. Next, the report reviews all experimental applications of slotting methods. Aspects reviewed include the specimen geometry and material, the details of making the slot, the method used to measure deformation, and the theoretical solutions used to solve for stress. Finally, the report makes a brief qualitative comparison between slotting methods and other residual stress measurement methods.

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Bibliography

2014

Aluminum-Lithium Alloys

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Evaluation of corrosion behaviour of AlÀMgÀLi alloys in sea water. J. Mater. Eng. Perform. 5, 235À240. Ahmadi, S., Arabi, H., Shokuhfar, A., 2010. Effects of multiple strengthening treatments on mechanical properties and stability of nanoscale precipitated phases in an alumi-numÀcopperÀlithium alloy. J. Mater. Sci. Technol. 26, 1078À1082. Ahmed, M., 1987, Correlation between aging heat treatments, microstructure and stress corrosion properties of AlÀLiÀCuÀMg alloys.

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Crack growth and residual stress in Al-Li metal matrix composites under far-field cyclic compression

Cited by 13 publications

References 16 publications

Measuring residual stress and the resulting stress intensity factor in compact tension specimens

Measuring residual stress and the resulting stress intensity factor in compact tension specimens

Residual stress measurement by successive extension of a slot: A literature review

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