Optimum design considerations for mechanically fastened composite joints

Arnold, W.S.; Marshall, I.H.; Wood, J.

doi:10.1016/0263-8223(90)90068-p

Cited by 26 publications

(7 citation statements)

References 6 publications

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“…A combination of a characteristic distance [12] and a failure theory were used by several authors [13,[15][16][17][18][19]. Chang et al [13] used the Yamada-Sun [14] failure criterion together with a proposed characteristic curve in a bi-dimensional Finite Element (FE) model.…”

Section: About Here]mentioning

confidence: 99%

“…Knowing ω the functions φ and ψ defined in equations (13) and 15 The strength of the laminate, X L T = 845.1MPa, and the fracture toughness of the laminate K IC are reported respectively in [40] and [41]. Without loss of generality it is proposed to use a Gompertz function [42] to obtain an analytical expression of the R-curve, K IC (∆a), to be inserted in equation (18). Therefore the R-curve can be expressed as:…”

Section: Model Validationmentioning

confidence: 99%

“…For a given ω, the length l can be obtained from equation (18). Consequently, substituting l, for example in equation 14, the bearing stress at failure can be obtained.…”

Section: Model Validationmentioning

confidence: 99%

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A semi-analytical method to predict net-tension failure of mechanically fastened joints in composite laminates

Catalanotti

Camanho

2013

Composites Science and Technology

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A Finite Fracture Mechanics model is proposed to predict the net-tension strength of composite mechanically fastened joints. A modification of coupled stress-energy criteria is suggested to take properly into account the effect of the R-curve in determining the crack length corresponding to the unstable crack propagation. The proposed model works for quasi-isotropic laminates and it requires as input the longitudinal strength and the fracture toughness of the laminate. The predictions obtained show good agreement when compared with the experimental results.

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Section: About Here]mentioning

confidence: 99%

Section: Model Validationmentioning

confidence: 99%

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A semi-analytical method to predict net-tension failure of mechanically fastened joints in composite laminates

Catalanotti

Camanho

2013

Composites Science and Technology

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“…Application of the FEM can produce much important information that usually cannot be obtained from experiments. 15 For dental restorations, the FEM has sometimes been applied to different simulations of mechanical behavior. 16 -18 Numerous studies are found to predict failure of dental materials using criteria.…”

Section: Introductionmentioning

confidence: 99%

Numerical failure analysis of glass‐fiber‐reinforced composites

Tanimoto

Nemoto

2003

J Biomedical Materials Res

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Abstract:The purpose of this work was to propose a new numerical model for glass-fiber-reinforced composites. The proposed numerical model was constructed with orthotropic shell, isotropic shell, and beam elements representing glass fiber cloth, silica filler, and the remaining matrix resin, respectively. The proposed model was applied to failure analysis under three-point bending conditions. The validity of the numerical model was checked through comparisons with experimental results. Four types of specimens were used: composite resin, and composite resin with neutral, upper, and lower glass-fiber cloth reinforcement insertions.For all types, close agreement between the analytical and experimental results was confirmed. This indicates that the proposed numerical model is effective for evaluating the mechanical behaviors of glass-fiber-reinforced composites.

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“…18 In aerospace engineering, researchers have replaced unidirectional layers with multi-directional ones to enhance joint connection efficiency, capitalizing on the design adaptability of composite layups. 19 Collings 20 conducted a study on the influence of layup angle and sequence on CFRP joint performance, proposing an optimization strategy for aerospace layup design, favoring a dominant ±45 layup, which was found to increase the joint shear strength by more than 100%. Park 21 delved into the effects of ply sequence on the load-bearing capacity of anisotropic and quasi-isotropic CFRP joints, suggesting that placing the 90 ply on the surface and fiber layup of [90/±45/0] S joints yielded the highest bearing strength.…”

Section: Introductionmentioning

confidence: 99%

Effects of off‐axis load direction on tensile properties of pultruded fiber‐reinforced polymer bolted joints with multi‐directional fiber lay‐ups

Liang,

Wang,

Zhong

et al. 2024

Polymer Composites

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The limited joint performance of unidirectional (UD) pultruded fiber‐reinforced polymer (FRP) composites poses a critical issue that constrains their application in structural engineering. Moreover, UD pultruded FRP joints display a notable reduction in strength and stiffness as the load angle diverges from the fiber pultrusion direction. This paper presents a numerical study of bolted pultruded FRP joints with different off‐axis loading directions. Two types of fiber lay‐ups, including UD and multi‐directional (MD), were investigated. Static tensile tests were conducted with the loading direction parallel to the pultrusion. A finite element model was validated by the test results. Studied geometric parameters includes the end‐to‐diameter (e/d) ratio, width‐to‐diameter (w/d) ratio, and bolt arrangement. Compared to UD joints, MD joints exhibited significant advantages in strength and stiffness under off‐axis loading with an increasing of 78.3% at a loading angle of 90°. Compared to the end distance, plate width has a more significant impact on the off‐axis behaviors of MD joints, especially between 30° and 75°. Multi‐bolted joints were more susceptible to net‐tension failure than single‐bolted joints. Furthermore, classical laminate theory and Hashin failure criterion were employed to predict the resistance of single‐bolted FRP joints with different loading angles, achieving high accuracy.Highlights Under increased off‐axis loading angles, compared with unidirectional (UD) joints, multi‐directional (MD) joints display a less reduction in both strength and stiffness. At a 90° angle UD joints displayed only 21.7% of the joint resistance of MD joints. Compared to the end distance, plate width has a more significant impact on the off‐axis behaviors of MD joints, especially between 30° and 75°. Classical Laminate Theory, Hashin failure criterion were effectively utilized to predict the ultimate strength of pultruded joints under various tensile loading angles, yielding high accuracy. The error between theoretical and simulated values is within 20%.

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Optimum design considerations for mechanically fastened composite joints

Cited by 26 publications

References 6 publications

A semi-analytical method to predict net-tension failure of mechanically fastened joints in composite laminates

A semi-analytical method to predict net-tension failure of mechanically fastened joints in composite laminates

Numerical failure analysis of glass‐fiber‐reinforced composites

Effects of off‐axis load direction on tensile properties of pultruded fiber‐reinforced polymer bolted joints with multi‐directional fiber lay‐ups

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