Analytical modeling for stress distribution around interference fit holes on pinned composite plates under tensile load

Wu, Tao; Zhang, Kaifu; Cheng, Hui; Liu, Ping; Song, Dong‐Ping; Yuan, Li

doi:10.1016/j.compositesb.2016.06.011

Cited by 47 publications

(26 citation statements)

References 34 publications

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“…Currently, there is a paradigm shift in the lightweight structural application such as aerospace [1], automobile [2,3], maritime [4] and construction industries [5,6], where the use of traditional metallic structures are being substituted by advanced composites structures. The use of fiber-reinforced composites (FRC) is proliferating due to their preeminent specific mechanical properties [7][8][9][10], design flexibility [11], and fatigue life enhancement [12]. Additionally, the demand for FRC in these industries, especially aircraft and maritime, is growing expeditiously with anticipated demands to The bridging effect in complex shape structures, where laminates do not completely conform to the shape of the mold, is prevented by the use of an MSVB technique.…”

Section: Introductionmentioning

confidence: 99%

Effects of Processing Parameters for Vacuum-Bagging-Only Method on Shape Conformation of Laminated Composites

et al. 2020

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Complex composite structures manufactured using a low-pressure vacuum bag-only (VBO) method are more susceptible to defects than flat laminates because of the presence of complex compaction conditions at corners. This study investigates the contribution of multivariate processing parameters such as bagging techniques, curing profiles, and laminate structures on laminates’ shape conformation. Nine sets of laminates were produced with a concave corner and another nine sets with a convex corner, both with a 45° inclined structure. Three-way analysis of variance (ANOVA) was performed to quantify thickness variation and spring effect of laminated composites. The analysis for concave and convex corners showed that the bagging techniques is the main factor in controlling the laminate thickness for complex shape applications. The modified (single) vacuum-bag-only (MSVB) technique appeared to be superior when compared to other bagging techniques, exhibiting the least coefficients of variation of 0.015 and 0.016 in composites with concave and convex corners, respectively. Curing profiles and their interaction with bagging techniques showed no statistical significance in the contribution toward laminate thickness variation. The spring effect of laminated composites was investigated by calculating the coefficient of determination (R2) relative to that of the mold. The specimens exhibited a good agreement with R2 values ranging from 0.9824 to 0.9946, with no major data offset. This study provides guidelines to reduce thickness variations and spring effect in laminated composites with complex shapes by the optimum selection of processing parameters for prepreg processing.

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Section: Introductionmentioning

confidence: 99%

Effects of Processing Parameters for Vacuum-Bagging-Only Method on Shape Conformation of Laminated Composites

et al. 2020

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“…Sun et al [2] researched the process of a pin interference fit and the subsequent fatigue damage evolution, and the result shows that the effect of the interference fit on the fatigue life improvement is beneficial. Wu et al [3,4] deepened the study of the interference fit to improve fatigue life and used the spring-mass model to explore the fatigue enhancing mechanism of interference. e study of Zeng et al [4] on an interference fit between hole and rivet shows that an interference fit can not only improve fatigue life but also enhance strength effect by changing size.…”

Section: Introductionmentioning

confidence: 99%

“…e recommended range of the interference amount for the reliability mathematical model is [2.2, 2.8] mm; in order to get more data points, on this basis, extend the scope of δ 3max to [2,3] mm.…”

mentioning

confidence: 99%

Multiobjective Intelligent Cooperative Design for the Multilayer Interference Fit

Ning

Wang

Jiang

et al. 2019

Mathematical Problems in Engineering

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Interference fit has extensively been applied in different mechanical fields due to its advantages such as compactness and high rigidity. With the actual needs of engineering, the multilayer interference fit has also been widely used. It is significant for the design and manufacture of multilayer interference fit to consider stress concentration problem and achieve multiobjective and multivariable collaborative optimization in the optimization algorithm. To achieve this goal, the mechanical model and reliability mathematical model of the multilayer interference fit are established. Giving an evaluation method of reliability, the recommended range of interference amount is obtained. Considering the lightweight design and stress concentration problems, a multiobjective intelligent cooperative design (MOICD) method for the multilayer interference fit is proposed, and multiparameter analysis is done. Taking the typical wind turbine’s shrink disk of three-layer interference fit structure as an application example, the key design parameters of the shrink disk are determined, and its sample data are obtained using the orthogonal experimental method. Considering yield strength, torque, and mass, the approximate mathematical model of response surface using the Kriging algorithm is given. Nondominated sorting genetic algorithm-II (NSGA-II) is selected as the optimal algorithm to realize MOICD of the shrink disk. Numerical analysis and analytical calculation proved that the optimization index of the MOICD method is improved compared with the traditional method. The sample is tested on a specific test bench, and the test results meet the design requirements, which verifies the feasibility of MOICD.

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“…Fibre reinforced polymer (FRP) composite laminates possess attractive characteristics like chemical resistance, low weight, design flexibility, high strength and high stiffness-to-weight ratio [1][2][3][4]. These properties account for manufacturing of structural parts with FRP composite in the aircraft and spacecraft industries, where drilling of the structural parts is frequently encountered for manufacturing either riveted assemblies or structural repairs [1,5,6].…”

Section: Introductionmentioning

confidence: 99%

Thermo-mechanical modelling of FRP cross-ply composite laminates drilling: Delamination damage analysis

Ismail

Ojo

Dhakal

2017

Composites Part B: Engineering

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Among other factors, thrust force, feed rate, twist drill bit chisel edge and point angle are the principal factors responsible for delamination drilling-induced damage during thermomechanical deformation. Hence, in this paper, an analytical thermo-mechanical model is proposed to predict critical feed rate and critical thrust force at the onset of delamination crack on CFRP composite cross-ply laminates, using the principle of linear elastic fracture mechanics (LEFM), laminated classical plate theory, cutting mechanics and energy conservation theory. The delamination zone (crack opening Mode I) is modelled as an elliptical plate. The advantages of this proposed model over the existing models in literature are that the influence of drill geometry (chisel edge and point angle) on push-out delamination are incorporated, and mixed loads condition are considered. The forces on chisel edges and cutting lips are modelled as a concentrated (point) and uniformly distributed loads, resulting into a better prediction. The model is validated with models in the literature and the results obtained show the flexibility of the proposed model to imitate the results of existing models.

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Analytical modeling for stress distribution around interference fit holes on pinned composite plates under tensile load

Cited by 47 publications

References 34 publications

Effects of Processing Parameters for Vacuum-Bagging-Only Method on Shape Conformation of Laminated Composites

Effects of Processing Parameters for Vacuum-Bagging-Only Method on Shape Conformation of Laminated Composites

Multiobjective Intelligent Cooperative Design for the Multilayer Interference Fit

Thermo-mechanical modelling of FRP cross-ply composite laminates drilling: Delamination damage analysis

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