Finite element analysis of cracks in aging aircraft structures with bonded composite-patch repairs

Gu, Linxia; Kasavajhala, Ananth Ram Mahanth; Zhao, Shijie

doi:10.1016/j.compositesb.2010.11.014

Cited by 51 publications

(14 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerical simulation is a complementary and cost‐effective method to laboratory work, and numerical approaches have been carried out by different researchers to study CFRP‐strengthened systems 25–30 . For example, the FE analysis package, ABAQUS, has been widely used for the analysis of fatigue problems of CFRP‐repaired systems 31–35 . However, most of the studies have been in aerospace engineering and they concern the fatigue problems of aluminium components rather than steel.…”

Section: Effects Of Bond Locations On the Mode I Sif Of Cct Steel Plamentioning

confidence: 99%

“…The SIFs along the crack tip were extracted and the crack propagation life was then predicted by using the power‐law relationship. A similar simulation was carried out by Gu et al 35 The effects of a series of parameters, such as crack length, the number of CFRP layers and adhesive thickness on the SIF of cracked aluminium plate were investigated. The same 20‐node brick elements were used for the aluminium plate, CFRP patch and adhesive layer, and the brick elements similarly collapsed to wedge elements at the crack tip.…”

Section: Effects Of Bond Locations On the Mode I Sif Of Cct Steel Plamentioning

confidence: 99%

“…[25][26][27][28][29][30] For example, the FE analysis package, ABAQUS, has been widely used for the analysis of fatigue problems of CFRP-repaired systems. [31][32][33][34][35] However, most of the studies have been in aerospace engineering and they concern the fatigue problems of aluminium components rather than steel. An analytical approach using the successive FE analysis technique was introduced by Lee and Lee 31 to characterize the fatigue crack growth behaviour of pre-cracked aluminium plates reinforced with composite patches.…”

Section: E F F E C T S O F B O N D L O C a T I O N S O N T H E M O D mentioning

confidence: 99%

See 2 more Smart Citations

Effects of CFRP bond locations on the Mode I stress intensity factor of centre‐cracked tensile steel plates

Zhao

Al-Mahaidi

et al. 2012

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

The fatigue life of cracked steel members can be greatly extended by externally attached carbon fibre reinforced plastics (CFRP), which reduces the stress intensity factors (SIFs) at the crack tip. Access to cracks is sometimes limited and the CFRP has to be attached away from the cracks. There is a lack of knowledge on SIFs for such strengthening scheme. This paper presents the effects of CFRP bond locations on the Mode I SIF of centre‐cracked tensile (CCT) steel plate. The Mode I SIF at the crack tip is calculated using the finite element (FE) models. A correction factor is introduced as a function of CFRP bond location and crack length. The FE results are compared and agree well with experimental tests conducted by the authors. By combining with another two factors (one considering CFRP mechanical properties and the other considering CFRP bond width) derived previously by the authors, SIF formulae are proposed for CFRP reinforced CCT steel plates.

show abstract

Section: Effects Of Bond Locations On the Mode I Sif Of Cct Steel Plamentioning

confidence: 99%

Section: Effects Of Bond Locations On the Mode I Sif Of Cct Steel Plamentioning

confidence: 99%

Section: E F F E C T S O F B O N D L O C a T I O N S O N T H E M O D mentioning

confidence: 99%

See 1 more Smart Citation

Effects of CFRP bond locations on the Mode I stress intensity factor of centre‐cracked tensile steel plates

Zhao

Al-Mahaidi

et al. 2012

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…Analytical works by Rose (1981Rose ( , 1988 are applicable for cracked infinite orthotropic plates repaired with elliptical composite patches. The finite-element (FE) method has been the choice for more complex three-dimensional (3D) crack problems (Naboulsi and Mall 1996;Sun et al 1996;Ayatollahi and Hashemi 2007;Lam et al 2010;Gu et al 2011;Wang et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Fiber-Reinforced Polymer Patches for Repairing Fatigue Cracks in Steel Plates Using a Genetic Algorithm

Lenwari

2020

J. Compos. Constr.

View full text Add to dashboard Cite

A practical design optimization of fiber-reinforced polymer (FRP) patches for repairing fatigue cracks in metallic structures is presented. The design procedure combines finite-element (FE), genetic programming (GP), and genetic algorithm (GA) approaches. An optimum patch design is defined as the combination of design parameters that simultaneously minimizes the patch volume and reduces the stress intensity factor (SIF) range below the fatigue threshold range. A patching correction factor, which accounts for the positive effects of material and geometric properties of the patch and adhesive layer on the SIF solution, is proposed. The correction factor is developed by performing symbolic regression via GP analyses on the SIF values obtained from the three-dimensional FE models. The closed-form SIF solution facilitates the visualization of the effects of design parameters, simplifies the calculation of fatigue life, and reduces the computation effort for design optimization. An example of the center-cracked steel plate subjected to constant amplitude fatigue loading and then repaired with double-sided adhesive-bonded FRP patches is used to illustrate the optimization procedure.

show abstract

“…These variations could be explained by the assumptions used in the kinetic approach [30]. In addition, the modeling framework for composite materials was validated in our previous work [7,53].…”

Section: Verification Of Fe Modelmentioning

confidence: 99%

Controllable energy absorption of double sided corrugated tubes under axial crushing

Mozafari

Lin

Tsui

et al. 2018

Composites Part B: Engineering

Self Cite

View full text Add to dashboard Cite

To maximize the controllable energy absorption of corrugation troughs as observed in the single sided corrugated (SSC) tube, we proposed and tested a new structure design, i.e., double-sided corrugated (DSC) tube made of Al 6060-T6 aluminum alloy or CF1263 carbon/epoxy composite. Finite element models were developed to test the mechanical advantage of the DSC tube in comparison with both SSC and classical straight (S) tubes under axial crushing. Results have shown that the total absorbed energy of the DSC aluminum tube with 14 corrugations was 330% and 32% higher than that of the SSC tube with 14 corrugations and the S-tube, respectively. The initiation and progression of the crushing process for different tube configurations were characterized, leading to the mechanism of energy absorption. Plastic deformation in terms of PPEQ is the key parameter correlating with the energy absorption capacity. To overcome the lower specific absorbed energy (SAE) in the DSC tube compared to that in the S-tube, the CF1263 carbon/ epoxy composite laminate was adopted and the corresponding SAE was 5.9 times higher than that of the aluminum one. Moreover, the influence of the number of corrugations on the crushing behaviors of the DSC tube was also digitalcommons.unl.edu M o z a f a r i e t a l . i n C o m p o s i t e s P a r t B 1 3 4 ( 2 0 1 8 ) 2 inspected. A minimal straight tube section was suggested for a controllable smooth crushing behavior regardless of its advantage in SAE. This work might shed light on designing future thin-walled energy absorber devices with better control of crushing behaviors for minimal injuries and damages.

show abstract

Finite element analysis of cracks in aging aircraft structures with bonded composite-patch repairs

Cited by 51 publications

References 21 publications

Effects of CFRP bond locations on the Mode I stress intensity factor of centre‐cracked tensile steel plates

Effects of CFRP bond locations on the Mode I stress intensity factor of centre‐cracked tensile steel plates

Optimization of Fiber-Reinforced Polymer Patches for Repairing Fatigue Cracks in Steel Plates Using a Genetic Algorithm

Controllable energy absorption of double sided corrugated tubes under axial crushing

Contact Info

Product

Resources

About