Fatigue behaviour and life prediction of fibre reinforced metal laminates under constant and variable amplitude loading

Wu, Xue Ren; Guo, Y. J.

doi:10.1046/j.1460-2695.2002.00517.x

Cited by 14 publications

(6 citation statements)

References 19 publications

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“…Aside from the aforementioned tensile and compressive properties, GLARE exhibits numerous material advantages over conventional monolithic metals and several investigations aimed at understanding GLARE in this capacity can be found in the literature including: in-plane shear [16,32,34]; fatigue and fracture [35][36][37][38][39][40][41][42]; residual strength, damage tolerance and fracture toughness [43,44]; blunt notch strength [45][46][47];…”

Section: Mechanical Behaviourmentioning

confidence: 99%

On The Development Of A Strength Prediction Methodology For Fibre Metal Laminates In Pin Bearing

Krimbalis¹

2021

Preprint

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The development of Fibre Metal Laminates (FMLs) for application into aerospace structures represents a paradigm shift in airframe and material technology. By consolidating both monlithic metallic alloys and fibre reinforced composite layers, a new material structure is born exhibiting desired qualities emerging from its heterogeneous consituency. When mechanically fastened via pins, bolts and rivets, these laminated materials develop damage and ultimately fail via mechanisms that were not entirely understood and different than either their metallic or composite constituents. The development of a predictive methodology capable of characterizing how FMLs fastened with pins behave and fail would drastically reduce the amount of experimentation necessary for material qualification and be an invaluable design tool. The body of this thesis discusses the extension of the characteristic dimension approach to FMLS and the subsequent development of a new failure mechanism as part of a progressive damage infinte element (FE) modeling methodology with yielding, delamination and buckling representing the central tenets of the new mechanism. This yielding through delamination buckling (YDB) mechanism and progressive FE model were investigated through multiple experimental studies. The experimental investigations required the development of a protocol with emphasis on measuring deformation on a local scheme in addition to a global one. With the extended protocol employed, complete characterization of the material response was possbile and a new definition for yield in a pin bearing configuration was developed and subsequently extended to a tensile testing configuraiton. The performance of this yield definition was compared directly to existing definitions and was shown to be effective in both quasi-isotropic and orthotropic materials. The results of the experiments and FE simulations demonstrated that yielding (according to the new definition), buckling and delamination resulting in joint collapse and failure have all occurred within the stipulated predictions of the YDB mechanism.

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Section: Mechanical Behaviourmentioning

confidence: 99%

On The Development Of A Strength Prediction Methodology For Fibre Metal Laminates In Pin Bearing

Krimbalis¹

2021

Preprint

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“…Secondly, the value of S AP will be solved as follows: (1) e expected value m corresponding to each S m is calculated by (17), and each measured point data (S m , S a ) are projected onto the N p plane by (18). (2) Each mapping point S ap is transposed onto the S m � 0 axis by (15) or (16).…”

Section: Advances In Materials Science and Engineeringmentioning

confidence: 99%

“…e fatigue crack growth model and delamination growth behavior of notched fiber metal laminates were studied by Khan et al [14][15][16][17], who considered the effect of variable amplitude loading. A mechanism-based life prediction model of FMLs under constant amplitude loading was developed by Wu and Guo [18]. And the fatigue behaviors of GLARE laminates under single overloads were investigated experimentally and were predicted by an equivalent crack closure model.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mean Stress on the Fatigue Life Prediction of Notched Fiber‐Reinforced 2060 Al‐Li Alloy Laminates under Spectrum Loading

Meng

Xie

Wang

et al. 2018

Advances in Materials Science and Engineering

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is paper presents a study on the fatigue life prediction of notched fiber-reinforced 2060 Al-Li alloy laminates under spectrum loading by applying the constant life diagram. Firstly, a review on the state of the art of constant life diagram models for the life prediction of composite materials is given, which highlights the effect on the forecast accuracy. en, the fatigue life of notched fiber-reinforced Al-Li alloy laminates (2/1 laminates and 3/2 laminates) is tested under cyclic stress, which has different stress cycle characteristics (constant amplitude loading and Mini-Twist spectrum loading). e introduced models are successfully realized based on the available experimental data of examined laminates. In the case of Mini-Twist spectrum loading, the effect of the constant life diagram on the life prediction accuracy of examined laminates is studied based on the rainflow-counting method and Miner damage criteria. e results show that the simple Goodman model and piecewise linear model have certain advantages compared to other complex models for the life prediction of notched fiber metal laminates with different structures under MiniTwist loading. From the engineering perspective, the S-N curve prediction based on the piecewise linear model is most applicable and accurate among all the models.

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“…It has a lower density, longer service life, and maintenance during the service process than metal structures. Hence, GLARE is the most maturely developed and widely used FMLs [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

The Experimental Study on the Mechanical Properties of Fiber-Reinforced Metal Laminates Using an Innovative Heat-Solid Integrated Forming Technology

Zhang

Sun

et al. 2023

Metals

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In the forming process of fiber-reinforced metal laminates (FMLs) product, the exploratory compound forming technology, including hot stamping of aluminum alloy and laying process of fiber prepreg which is named HFQ-FMLs was proposed to solve the puzzles such as weak rigidity, low strength and integration deformation with large difficulty, and the feasibility and mechanical properties of the innovative forming process were studied. Firstly, based on the modified metal volume fraction formula, the theoretical values of the mechanical properties of the HFQ-FMLs plates were calculated. Compared with the experimental results, the minimum error is 1%, proving that the HFQ-FMLs technology scheme is feasible. Secondly, three kinds of metal sheets with different heat treatments and specimens by HFQ-FMLs were carried out for the tensile tests, the mechanical properties distributions were demonstrated, and the influence regularity of the strain rate and rolling direction on the stress analysis was considered at the same time. As can be seen from the distribution of yield strength and tensile strength, the yield stress of metal sheets obtained by HFQ-FMLs technology along the 45° is superior to the raw material and can increase by 46% under strain rate = 0.01 s−1. While, because the vacuum thermal curing treatment makes the aluminum alloy happen double aging, the metal sheet strength dropped, and the jointing strength between the metal and fiber prepreg became weak too, which made the strength limit of the new material improve weakly. Thirdly, the fractured style of the FMLs under different conditions was studied qualitatively. It is helpful to achieve the development rule of defects, optimize the craft route, and avoid deformation failure.

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Fatigue behaviour and life prediction of fibre reinforced metal laminates under constant and variable amplitude loading

Cited by 14 publications

References 19 publications

On The Development Of A Strength Prediction Methodology For Fibre Metal Laminates In Pin Bearing

On The Development Of A Strength Prediction Methodology For Fibre Metal Laminates In Pin Bearing

Effect of Mean Stress on the Fatigue Life Prediction of Notched Fiber‐Reinforced 2060 Al‐Li Alloy Laminates under Spectrum Loading

The Experimental Study on the Mechanical Properties of Fiber-Reinforced Metal Laminates Using an Innovative Heat-Solid Integrated Forming Technology

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