Combined modelling and experimental studies of failure in thick laminates under out-of-plane shear

Jia, Liyong; Yu, Ling-Shan; Zhang, K.; Li, M.; Jia, Yunlong; Blackman, B.R.K.; Dear, John P.

doi:10.1016/j.compositesb.2016.08.017

Cited by 41 publications

(19 citation statements)

References 18 publications

(21 reference statements)

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“…This limitation can be overcome by using the DIC method or correction factor for compensating the nonuniform strain gradients. 83 , 90 , 91 Additionally, in the nonshear failure mode, it is evident that unavoidable normal stresses ( σ n ) at the notch roots lead to premature failure. 53 , 88 Melin and Neumeister 80 , 86 , 92 , 93 outlined several failure features encountered in Iosipescu specimens, and focused on theoretical analysis including the geometric nonlinearity (i.e.…”

Section: Comparison Of Composite Materials Testing Methodsmentioning

confidence: 99%

Review of material test standardization status for the material qualification of laminated thermosetting composite structures

Park

Choi

2020

Journal of Reinforced Plastics and Composites

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This paper presents a review of recent literature related to the static mechanical testing of thermoset-based carbon fiber reinforced composites and introduces a material qualification methodology to generate statistically-based allowable design values for aerospace application. Although most test methods have been found to be effective in determining the specific material properties by incorporating them into the material qualification and quality control provisions, a full validation to clarify the behavior of thermoset-based laminated composite materials is currently lacking, particularly with regard to the characterization of compressive, in-plane, interlaminar shear, and damage tolerance properties. The present study obtains information on the different types of test method that can be employed within the same material properties, and makes an in-depth experimental comparison based on the past literatures. A discussion on the scope of theoretical analysis involves a description of how the proposed test method can be adequate for obtaining more accurate material properties. This discussion is directly applicable to the assessment of material nonlinearity and the geometrical effect of specimens. Finally, the resulting failure modes and the effect of each material property are studied to aid the understanding of the load distribution and behavior of laminated composite materials.

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Section: Comparison Of Composite Materials Testing Methodsmentioning

confidence: 99%

Review of material test standardization status for the material qualification of laminated thermosetting composite structures

Park

Choi

2020

Journal of Reinforced Plastics and Composites

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“…The orthotropic elastic model and progressive damage criteria are widely used to describe the behavior of thermoset composites [7][8][9][10][11], [27][28][29][30][31][32][33][34] . It is known that thermoplastic composites have a remarkable nonlinear behavior because of the plasticity behavior of thermoplastic matrix, which enhance the ductility and impact resistance of thermoplastic composites.…”

Section: Constitutive Modelmentioning

confidence: 99%

“…[23] But Wang's stiffness degradation model is an empirical formula, which only considers the degradation of shear modulus. In order to describe the tensile process and investigate the damage of CF/PEEK hole, elastic damage initiation criteria and evolution law are applied to the elastic part of Sun's model according to the research of Hashin et al [25][26][27][28][29][30][31][32][33] It is assumed that the total strain increment can be separated into elastic and plastic components as [21] dε ij = dε e ij + dε p ij ð1Þ…”

Section: Constitutive Modelmentioning

confidence: 99%

Effect of CF/PEEK plasticity behavior on the mechanical performance of interference‐fit joint

Yao

Chen

et al. 2021

Polymer Composites

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Carbon fiber reinforced polyetheretherketone polymer (CF/PEEK) thermoplastic composites have a marked plastic yield stage compared to thermoset composites with epoxy matrix. During the interference fit riveting process, extrusion between rivet and composites laminate creates plastic deformation on the hole wall, which will enhance the bearing capacity of composites hole. Therefore, it is expected that the interference fit will play a greater advantage in enhancing the bearing strength of CF/PEEK riveted joint. Numerical and experimental study are applied to investigate the effect of interference fit on bearing strength of CF/PEEK riveted joint. Results show that the plastic deformation of CF/PEEK composites hole wall is positively correlated with the bearing strength of CF/PEEK riveted joint. When the interference fit size exceeds 2.6%, the bearing capacity of CF/PEEK riveted joint reduces because of the increase of fiber damage. It is concluded that the plastic deformation of riveted hole wall can enhance the bearing capacity of CF/PEEK riveted joint, while fiber damage reduces the bearing capacity of CF/PEEK riveted joint. As the increase of interference-fit size, bearing strength of CF/PEEK riveted joint raises first then decreases, the appropriate interference-fit size is in the range of 2.0%~2.6%, which is larger than that of thermoset composites.

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“…The three-dimensional CDM were employed in modelling of damage progression through introduction of full damage effect tensor [14], [15] based on effective stress-strain theory. The constitutive relation of composite material associated with damage variable is updated once the failure criterion initiated [16], which can be expressed as,…”

Section: Damaged Materials Responsementioning

confidence: 99%

Strength enhancement of bonded composite laminate joints reinforced by composite Pins

Guo

Giannopoulos

et al. 2020

Composite Structures

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This paper presents an experimental and numerical investigation in the static strength enhancement of composite laminate Single Lap bonded Joints (SLJ), reinforced by pins made of Uni-Directional (UD) fibre reinforced plastic composite materials. Bonded lap joint specimens were experimentally tested in tension to obtain the failure loads and failure modes.The specimens were subsequently benchmarked against the hybrid version of the joint resulted from the introduction of composite Pins. The Pin reinforcement enhanced the hybrid single lap joint strength by an average of 19.1% increase. Numerical models generated were used for correlation with the experimental results. Numerical and experimental results observation indicated that increased strength of the hybrid bonded/Pinned joint was partly attributed to the load sharing between the adhesive and the Pin past the adhesive failure initiation as well as to the enhanced out-of-plane bending stiffness after the Pin introduction on the lap joint.Numerical investigations were performed as well with hybrid SLJ reinforced by composite pins versus designs employing metallic Pins. The simulations showed that for the investigated lap joint design parameters, the hybrid metallic pin joint failed at a higher failure load.Nevertheless, the hybrid joint utilizing the composite Pin could benefit from the enhanced corrosion resistance properties. In the case of applying a larger composite Pin diameter and/or rearranging the fibre orientation in the Pin, the hybrid SLJs could potentially achieve higher strength characteristics before the adhesive bond ultimate failure in relation to the steel Pin, as well as resulting to additional weight saving up to 46.9%.

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Combined modelling and experimental studies of failure in thick laminates under out-of-plane shear

Cited by 41 publications

References 18 publications

Review of material test standardization status for the material qualification of laminated thermosetting composite structures

Review of material test standardization status for the material qualification of laminated thermosetting composite structures

Effect of CF/PEEK plasticity behavior on the mechanical performance of interference‐fit joint

Strength enhancement of bonded composite laminate joints reinforced by composite Pins

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