Intelligent Condition Monitoring of Aerospace Composites: Part I - Nano Reinforced Surfaces &amp; Interfaces

Meguid, S. A.; Sun, Yu

doi:10.1007/s10999-005-0001-5

Cited by 7 publications

(3 citation statements)

References 22 publications

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“…However, the experimental and numerical studies have demonstrated that uniform distribution of CNTs in the matrix can only moderately improve the mechanical properties . CNTRCs can only contain a small amount of CNTs (2–5 wt%) because increasing volume fraction more than the specific limit will degrade their mechanical properties . Therefore, the idea of FG materials was considered to better take the advantage of CNT reinforcement effect.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear low‐velocity impact analysis of functionally graded nanotube‐reinforced composite cylindrical shells in thermal environments

2016

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This paper presents a nonlinear analysis of impact response of nanocomposites cylindrical shells reinforced by single-walled carbon nanotubes (SWCNTs) in thermal environments. The nanotube reinforcement distributions are either uniform or functionally graded in the shell thickness direction. Micromechanical models are employed to estimate the material properties of nanotube reinforced composites. A higher-order shear deformation theory with a von K arm an-type of kinematic nonlinearity yields the equations of motion. By considering the nanotube reinforced composites as temperature-dependent, the thermal effects are included. A two-step perturbation technique is used to solve the equations of motion. A parametric study is carried out, and the effects of nanotube distribution and its volume fraction, impactor initial velocity, temperature change, geometric parameter of shell, and edge boundary condition on the impact response of the shell are discussed. The numerical results show that the central deflection of the shell subjected to impact is sinusoidal. It is found that the nanotube distribution through the thickness can alter the amplitude and the frequency of the central deflection and also the energy absorption significantly. POLYM. COMPOS., 00:000-000,

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Section: Introductionmentioning

confidence: 99%

Nonlinear low‐velocity impact analysis of functionally graded nanotube‐reinforced composite cylindrical shells in thermal environments

2016

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“…The estimation methods are robust and include formulations for ductile adhesives. 10 On the other hand, the pure shear behaviour ( G IIC ) is usually addressed by End-Notched Flexure (ENF) testing, 11 but other options are the 4-Point End-Notched Flexure (4ENF) and End-Loaded Split (ELS) tests. 12 Under mixed-mode loading, the SLB, asymmetric DCB (ADCB) and mixed-mode bending (MMB) are viable options.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the mixed-mode fracture of bonded joints depending on the adhesive thickness

Macedo

Campilho

Silva

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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The mixed-mode strength of bonded joints can be predicted by techniques such as cohesive zone models (CZM), which requires the estimation of the adhesive strength and fracture toughness ( GC). Under the scope of fracture properties, the tensile and shear fracture toughness ( GIC and GIIC, respectively) and the corresponding mixed-mode behaviour are particularly relevant. Moreover, these parameters highly depend on the adhesive thickness ( tA), making it relevant to validate and propose CZM laws for bonded joint design. This work numerically addressed the tA influence on the mixed-mode fracture process of adhesive joints. For this purpose, single-leg bending (SLB) test experimental data was used, considering joints with composite adherends and a ductile adhesive, and tA from 0.1 to 2.0 mm. A numerical CZM analysis was performed, including the experimental and numerical load-displacement ( P- δ) curves’ comparison for validation, followed by the CZM law estimation and fracture envelope validation, for all tA. The effect of the different CZM parameters on the results was finally evaluated. Overall, it was possible to numerically ascertain the tA effect on the fracture behaviour of adhesive joints and to propose a numerical technique for mixed-mode bonded joint analysis.

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“…The aerospace industry is making a major effort to incorporate an increasing number of composite materials into various components and structures. For example, a recently developed commercial airplane will be 80% composites by volume [1]. Because the aerospace industry is a significant employer served regions of the country, there is a strong demand that education should cover net shape manufacturing of FRP composites in the curriculum, particularly in those regions.…”

Section: Introductionmentioning

confidence: 99%

Implementing Machining Of Fiber Reinforced Polymer Composites To Manufacturing Courses In 2 Year And 4 Year Programs

Kim

Flaman

2007 Annual Conference &Amp; Exposition Proceedings

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His teaching and research interests include manufacturing processes, composite materials, and mechanical behavior of engineered materials. Michael Flaman, Portland Community College Mr. Mike Flaman is an instructor and the Department Chair of Machine Manufacturing Technology Program at Portland Community College. He received his BS in Manufacturing at Oregon Institute of Technology. He had 15 years industry experience on tool design and manufacturing. His teach interests are design, machining, assembly, and statistical process control.

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Intelligent Condition Monitoring of Aerospace Composites: Part I - Nano Reinforced Surfaces & Interfaces

Cited by 7 publications

References 22 publications

Nonlinear low‐velocity impact analysis of functionally graded nanotube‐reinforced composite cylindrical shells in thermal environments

Nonlinear low‐velocity impact analysis of functionally graded nanotube‐reinforced composite cylindrical shells in thermal environments

Numerical analysis of the mixed-mode fracture of bonded joints depending on the adhesive thickness

Implementing Machining Of Fiber Reinforced Polymer Composites To Manufacturing Courses In 2 Year And 4 Year Programs

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