TY - JOUR
T1 - Fatigue crack growth under variable-amplitude loading
T2 - Part II - Code development and model validation
AU - Ray, Asok
AU - Patankar, Ravindra
N1 - Funding Information:
The research work reported in this paper has been supported in party by National Science Foundation under grant no. CMS-9819074; National Academy of Sciences under a research fellowship award to the first author; ARINC Corporation under NASA Langley Research Center Cooperative Agreement No. NCC1-333.
PY - 2001/11
Y1 - 2001/11
N2 - A state-space model of fatigue crack growth has been formulated based on the crack closure concept in the first part of the two-part paper. The unique feature of this state-space model is that the constitutive equation for crack-opening stress is governed by a low-order non-linear difference equation without the need for storage of a long load history. Therefore, savings in the computation time and memory requirements are significant. This paper, which is the second part, provides information for code development and validates the state-space model with fatigue test data for different types of variable-amplitude and spectrum loading in 7075-T6 and 2024-T3 aluminum alloys, respectively. Predictions of the state-space model are compared with those of the FASTRAN and AFGROW codes.
AB - A state-space model of fatigue crack growth has been formulated based on the crack closure concept in the first part of the two-part paper. The unique feature of this state-space model is that the constitutive equation for crack-opening stress is governed by a low-order non-linear difference equation without the need for storage of a long load history. Therefore, savings in the computation time and memory requirements are significant. This paper, which is the second part, provides information for code development and validates the state-space model with fatigue test data for different types of variable-amplitude and spectrum loading in 7075-T6 and 2024-T3 aluminum alloys, respectively. Predictions of the state-space model are compared with those of the FASTRAN and AFGROW codes.
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U2 - 10.1016/S0307-904X(01)00027-0
DO - 10.1016/S0307-904X(01)00027-0
M3 - Article
AN - SCOPUS:0035498946
SN - 0307-904X
VL - 25
SP - 995
EP - 1013
JO - Applied Mathematical Modelling
JF - Applied Mathematical Modelling
IS - 11
ER -