scholarly journals Stress-Ratio Effect on Propagation of Delamination Fatigue Cracks in Unidirectional Graphite/Epoxy Laminates under Mixed Mode (I+II) Loading.

1999 ◽  
Vol 48 (12) ◽  
pp. 1408-1415
Author(s):  
Hiroshi TANAKA ◽  
Keisuke TANAKA ◽  
Hidetaka KATOH ◽  
Tatsuya TSUJI
Keyword(s):  
Mixed Mode ◽  
Stress Ratio ◽  
Fatigue Cracks ◽  
Mode I ◽  
Ratio Effect

scholarly journals Effect of Stress Ratio on Mode I Propagation of Interlaminar Fatigue Cracks in CFRP.

1995 ◽  
Vol 44 (502) ◽  
pp. 960-966 ◽  
Author(s):  
Keisuke TANAKA ◽  
Hiroshi TANAKA ◽  
Tatsuya TSUJI ◽  
Kenjiro YAMAGISHI
Keyword(s):  
Stress Ratio ◽  
Fatigue Cracks ◽  
Mode I

scholarly journals Mixed-Mode (I+II) propagation of Delamination Fatigue Cracks in Unidirectional Graphite/Epoxy Laminates.

1999 ◽  
Vol 65 (636) ◽  
pp. 1676-1683 ◽  
Author(s):  
Hiroshi TANAKA ◽  
Keisuke TANAKA ◽  
Tatsuya TSUJI ◽  
Hidetaka KATOH
Keyword(s):  
Mixed Mode ◽  
Fatigue Cracks ◽  
Mode I

Fatigue Crack Growth Thresholds of Deflected Mixed-Mode Cracks in PWA1484

2005 ◽  
Vol 127 (1) ◽  
pp. 2-7 ◽  
Author(s):  
K. S. Chan ◽  
J. Feiger ◽  
Y.-D. Lee ◽  
R. John ◽  
S. J. Hudak,
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Mixed Mode ◽  
Fatigue Cracks ◽  
Symmetry Plane ◽  
Crystallographic Analysis ◽  
Mode I ◽  
Test Technique ◽  
Crack Paths

The fatigue crack growth (FCG) behavior of PWA1484 single crystals was characterized in air under mixed-mode loading at 593°C as a function of crystallographic orientation using an asymmetric four-point bend test technique. Most mixed-mode fatigue cracks deflected from the symmetry plane and propagated as transprecipitate, noncrystallographic cracks, while self-similar fatigue crack growth occurred on the (111) planes in (111)/[011] and 111/[112]¯ oriented crystals. The local stress intensity factors and the crack paths of the deflected mixed-mode cracks were analyzed using the finite-element fracture mechanics code, FRANC2D/L. The results indicated that the deflected crack path was close to being normal to the maximum tensile stress direction where the Mode II component diminishes. Crystallographic analysis of the deflected crack paths revealed that the Mode I and the deflected mixed-mode cracks were usually of different crystallographic orientations and could exhibit different Mode I FCG thresholds when the crystallography of the crack paths differed substantially. These results were used to identify the driving force and conditions for cracking mode transition.

scholarly journals Fatigue Crack Growth under Non-Proportional Mixed Mode Loading in Rail and Wheel Steel Part 2: Sequential Mode I and Mode III Loading

2019 ◽  
Vol 9 (14) ◽  
pp. 2866 ◽  
Author(s):  
Makoto Akama ◽  
Akira Kiuchi
Keyword(s):  
Crack Growth ◽  
Mixed Mode ◽  
Fatigue Cracks ◽  
Rolling Contact ◽  
Material Strength ◽  
Shear Mode ◽  
Mode I ◽  
Mode Iii ◽  
Plane Shear ◽  
Branch Crack

Rolling contact fatigue cracks in rail and wheel undergo non-proportional mixed mode I/II/III loading. Fatigue tests were performed to determine the coplanar and branch crack growth rates on these materials. Sequential and overlapping mode I and III loading cycles were applied to single cracks in round bar specimens. Experiments in which this is done have been rarely performed. The fracture surface observations and the finite element analysis results suggested that the growth of long (does not branch but grown stably and straight) coplanar cracks was driven mainly by mode III loading. The cracks tended to branch when increasing the material strength and/or the degree of overlap between the mode I and III loading cycles. The equivalent stress intensity factor range that can consider the crack face contact and successfully regressed the crack growth rate data is proposed for the branch crack. Based on the results obtained in this study, the mechanism of long coplanar shear-mode crack growth turned out to be the same regardless of whether the main driving force is in-plane shear or out-of-plane shear.

Deviant Crack Path Behaviour of Aluminium-Lithium Alloy AA8090 Plate

1996 ◽  
Vol 210 (2) ◽  
pp. 117-121
Author(s):  
P J Gregson ◽  
I Sinclair
Keyword(s):  
Crack Growth ◽  
Mixed Mode ◽  
Fatigue Testing ◽  
Fatigue Cracks ◽  
Elastic Strain Energy ◽  
Strain Energy Release ◽  
Mode I ◽  
Mixed Mode Crack ◽  
Energy Release Rates ◽  
Strain Energy Release Rates

The unusual susceptibility of the Al-Li alloy AA8090 to sustained macroscopic deviation of fatigue cracks from a nominal mode I path during conventional fatigue testing is discussed. It is demonstrated that the mixed mode crack growth associated with macroscopic deviation may be characterized in terms of elastic strain energy release rates for a range of mixed mode loading conditions. It is specifically shown that this form of mixed mode crack growth may lead to non-conservative crack growth predictions when these materials are subjected to conventional, mode I based structure lifing techniques.

scholarly journals Mode I and mixed-mode propagation of delamination fatigue cracks in CFRP laminates.

1987 ◽  
Vol 36 (402) ◽  
pp. 222-228 ◽  
Author(s):  
Masaki HOJO ◽  
Claes-Göran GUSTAFSON ◽  
Keisuke TANAKA ◽  
Ryuichi HAYASHI
Keyword(s):  
Mixed Mode ◽  
Fatigue Cracks ◽  
Mode I ◽  
Mode Propagation ◽  
Cfrp Laminates

Mixed-Mode I/II/III Fracture Grip Interface

2010 ◽  
Vol 3 (2) ◽  
pp. 131-139
Author(s):  
Arash Karpour ◽  
Khosrow Zarrabi
Keyword(s):  
Mixed Mode ◽  
Mode I

Study of mixed mode I/II cohesive zone models of different rank coals

2021 ◽  
Vol 246 ◽  
pp. 107611
Author(s):  
Jianfeng Yang ◽  
Haojie Lian ◽  
Vinh Phu Nguyen
Keyword(s):  
Cohesive Zone ◽  
Mixed Mode ◽  
Mode I ◽  
Cohesive Zone Models

Experimental and numerical mixed-mode I + II fracture characterization of carbon fibre reinforced polymer laminates using a novel strategy

2021 ◽  
Vol 263 ◽  
pp. 113683
Author(s):  
Francis M.G. Ramírez ◽  
Marcelo F.S.F. de Moura ◽  
Raul D.F. Moreira ◽  
Filipe G.A. Silva
Keyword(s):  
Carbon Fibre ◽  
Mixed Mode ◽  
Mode I ◽  
Fracture Characterization ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Novel Strategy ◽  
Polymer Laminates
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