TY - JOUR
T1 - Mixed-mode thermoelastic fracture analysis of orthtropic composites
AU - Ju, S. H.
AU - Rowlands, R. E.
N1 - Funding Information:
S.H. Ju was supported by NSC in R.O.C. (project No. NSC-39123F). Special thanks to Brad Boyce of Stress Photonics, Madison, WI, for his assistance and use of the DeltaTherm system, and to Dr Yean-Yau Ni (formerly UW Madison) of PEM Concrete, Inc., Rochelle, IL. Several helpful suggestions by a reviewer are also appreciated.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2003/4
Y1 - 2003/4
N2 - This study demonstrates ability to determine the in-plane stress intensity factors, KI and KII, simultaneously under mixed-mode conditions in orthotropic composites by the combined use of least-squares, stress representations which are valid away from the crack and distant measured temperatures. Recognizing the stresses near a crack-tip are dominated by the stress intensity factors, it has not been uncommon to neglect the higher-order stress terms when evaluating these factors. However, and among other considerations, it is typically difficult to obtain accurate temperature information very near the crack-tip. It can therefore be advantageous to employ measured data which originate away from the crack and to retain six to eight terms in the stress functions when evaluating the stress intensity factors. On the other hand, errors in KI and/or KII can be appreciable if only the r-1/2 terms are employed with distant input information.
AB - This study demonstrates ability to determine the in-plane stress intensity factors, KI and KII, simultaneously under mixed-mode conditions in orthotropic composites by the combined use of least-squares, stress representations which are valid away from the crack and distant measured temperatures. Recognizing the stresses near a crack-tip are dominated by the stress intensity factors, it has not been uncommon to neglect the higher-order stress terms when evaluating these factors. However, and among other considerations, it is typically difficult to obtain accurate temperature information very near the crack-tip. It can therefore be advantageous to employ measured data which originate away from the crack and to retain six to eight terms in the stress functions when evaluating the stress intensity factors. On the other hand, errors in KI and/or KII can be appreciable if only the r-1/2 terms are employed with distant input information.
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U2 - 10.1023/A:1025557715318
DO - 10.1023/A:1025557715318
M3 - Article
AN - SCOPUS:0141976765
VL - 120
SP - 601
EP - 621
JO - International Journal of Fracture
JF - International Journal of Fracture
SN - 0376-9429
IS - 4
ER -