Three-Dimensional Effective Elastic Constants for Thick Laminates

Sun, C. T.; Li, Sijian

doi:10.1177/002199838802200703

Cited by 247 publications

(100 citation statements)

References 4 publications

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“…Using the nominal ply properties mentioned above, CLT torsional shear moduli of the selected specimens are l xy,0 = 28.91 and l xy,1 = 24.26 GPa, thus casting ambiguity over which l xy should be used. On the other hand, we obtain from [20] l xz,0 = l xz,1 = 3.56 GPa, showing that the transverse shear term will have a relatively small effect on specimen compliance (lower than 12%). In these circumstances, one can assume l xz = 3.56 GPa without introducing significant errors, thus allowing l xy to be computed from Eq.…”

Section: Discussionmentioning

confidence: 72%

Mode III interlaminar fracture of carbon/epoxy laminates using the edge crack torsion (ECT) test

Morais

Péreira

Moura

et al. 2009

Composites Science and Technology

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The mode III interlaminar fracture of carbon/epoxy laminates was evaluated with the edge crack torsion (ECT) test. Three-dimensional finite element analyses were performed in order to select two specimen geometries and an experimental data reduction scheme. Test results showed considerable non-linearity before the maximum load point and a significant R-curve effect. These features prevented an accurate definition of the initiation point. Nevertheless, analyses of non-linearity zones showed two likely initiation points corresponding to G IIIc values between 850 and 1100 J/m 2 for both specimen geometries. Although any of these values is realistic, the range is too broad, thus showing the limitations of the ECT test and the need for further research.

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Section: Discussionmentioning

confidence: 72%

Mode III interlaminar fracture of carbon/epoxy laminates using the edge crack torsion (ECT) test

Morais

Péreira

Moura

et al. 2009

Composites Science and Technology

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show abstract

“…The thickness of each prepreg lamina is 0.2 mm and the material properties are shown in Table 2. The elastic properties of the equivalent isotropic model are calculated based on the classical laminated plate theory [40] and are shown in Table 3. Density and thickness of the equivalent isotropic model are assumed to be 1517 kg/m 3 and 1.6 mm, respectively, which are the same as the QI composite laminate.…”

Section: Through Holes In the Aluminium Platementioning

confidence: 99%

Analytical and finite element prediction of Lamb wave scattering at delaminations in quasi-isotropic composite laminates

Ng¹,

Veidt²,

Rose³

et al. 2012

Journal of Sound and Vibration

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“…The material properties listed in the table were utilized for steel riser directly, as well as composite risers with layered-structure method (LSM). In terms of the composite risers with effective modulus method (EMM), a MATLAB code (Version 9.1 R2016b, MathWorks, Inc., Natick, MA, USA, 2016) of 3D laminate property theory [34,35] was created for calculating composite tube's 3D effective properties using Equations (1)- (6). Table 3 shows the effective properties of FRP composite risers for effective modulus method.…”

Section: Materials For the Risersmentioning

confidence: 99%

CFD Simulation of Vortex Induced Vibration for FRP Composite Riser with Different Modeling Methods

et al. 2018

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Featured Application: Three different risers, i.e., conventional steel riser, composite riser with orthogonal reinforcements and tailored composite riser, are compared for their VIV characteristics. The effects of 2D and 3D models and fluid-structure interaction (FSI) have been considered and two different modeling methods are established to simulate the FRP composite risers. This paper will serve to further understand the dynamic characteristics of the FRP composite risers and improve the utilization of the FRP composite risers in real projects. We believe present paper would appeal to the researchers working on the design and analysis of composite structures and their optimizations.Abstract: Steel risers are widely used in offshore oil and gas industry. However, the production capacity and depths are limited due to their extreme weight and poor fatigue and corrosion resistance. Nowadays, it is confirmed that fiber reinforced polymer (FRP) composite risers have apparent advantages over steel risers. However, the study of vortex induced vibration (VIV) for composite risers is rarely involved. Three different risers (one steel riser and two composite risers) were compared for their VIV characteristics. The effects of 2D and 3D models and fluid-structure interaction (FSI) were considered. The models of composite risers are established by effective modulus method (EMM) and layered-structure method (LSM). It is found that 2D model are only suitable for ideal condition, while, for real situation, 3D model with FSI has to be considered. The results show that the displacements of the FRP composite risers are significantly larger than those of the steel riser, while the stresses are reversed. In addition, the distributions of the displacements and stresses depend on the geometries, material properties, top-tension force, constraints, etc. In addition, it is obvious that EMM are suitable to study the global working condition while LSM can be utilized to obtain the results in every single composite layer.

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Three-Dimensional Effective Elastic Constants for Thick Laminates

Cited by 247 publications

References 4 publications

Mode III interlaminar fracture of carbon/epoxy laminates using the edge crack torsion (ECT) test

Mode III interlaminar fracture of carbon/epoxy laminates using the edge crack torsion (ECT) test

Analytical and finite element prediction of Lamb wave scattering at delaminations in quasi-isotropic composite laminates

CFD Simulation of Vortex Induced Vibration for FRP Composite Riser with Different Modeling Methods

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