Modeling-Driven Damage Tolerant Design of Graphene Nanoplatelet/Carbon Fiber/Epoxy Hybrid Composite Panels for Full-Scale Aerospace Structures

Tomasi, Julie; Pisani, William A.; Chinkanjanarot, Sorayot; Krieg, Aaron S.; Jaszczak, David C; Pineda, Evan J.; Bednarcyk, Brett A.; Miller, Sandi G.; King, Julia A.; Miskioğlu, I.; Odegard, Gregory M.

doi:10.2514/6.2019-1273

Cited by 7 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Approaches based on multi-scale methods are also widely employed in the case of graphene/polymer nanocomposites to model the structure of the materials and the architecture of the systems following the requirements of the specific spatial uses [ 28 ]. To design new graphene-based nanocomposite layers for aerospace applications, the synergistic coupling of multi-scale modelling with experiments has proven to be a successful approach [ 29 ]. This paper describes the Integrated Computational Materials Engineering (ICME) method that has been applied in fabricating large aerospace laminate structures made by graphene/carbon fibre/polymer.…”

Section: The Engineering Of Graphenementioning

confidence: 99%

From Protosolar Space to Space Exploration: The Role of Graphene in Space Technology and Economy

2023

View full text Add to dashboard Cite

This paper aims to analyse the state-of-the-art of graphene-based materials and devices designed for use in space. The goal is to summarise emerging research studies, contextualise promising findings, and discuss underway strategies to address some specific space-related problems. To complete our overview of graphene-based technology and address the relevance of graphene in the wide scenario of the space economy, we also provide an analysis of worldwide patents and the scientific literature for aerospace applications in the period 2010–2021. We analysed global trends, country distributions, top assignees, and funding sponsors, evidencing a general increase for the period considered. These indicators, integrated with market information, provide a clear evaluation of the related technology trends and readiness levels.

show abstract

Section: The Engineering Of Graphenementioning

confidence: 99%

From Protosolar Space to Space Exploration: The Role of Graphene in Space Technology and Economy

2023

View full text Add to dashboard Cite

show abstract

“…Molecular dynamics (MD) simulations are widely used for predicting thermo-mechanical properties of polymers and polymer composites. − MD simulations have proven to be accurate, efficient, trustworthy, and quite capable of exploring the structure–property relationships of polymer composites. With MD, atoms are simulated according to Newton’s laws of motion combined with “force fields” that define how the atoms interact with each other.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical Dilution of PLA/PETG–Glass/Iron Nanocomposites: A More Efficient Molecular Dynamics Approach

Pisani,

Wedgeworth,

Burroughs

et al. 2024

ACS Omega

Self Cite

View full text Add to dashboard Cite

Polylactic acid (PLA) and poly(ethylene terephthalate glycol) (PETG) are popular thermoplastics used in additive manufacturing applications. The mechanical properties of PLA and PETG can be significantly improved by introducing fillers, such as glass and iron nanoparticles (NPs), into the polymer matrix. Molecular dynamics (MD) simulations with the reactive INTER-FACE force field were used to predict the mechanical responses of neat PLA/PETG and PLA−glass/iron and PETG−glass/iron nanocomposites with relatively high loadings of glass/iron NPs. We found that the iron and glass NPs significantly increased the elastic moduli of the PLA matrix, while the PETG matrix exhibited modest increases in elastic moduli. This difference in reinforcement ability may be due to the slightly greater attraction between the glass/iron NP and PLA matrix. The NASA Multiscale Analysis Tool was used to predict the mechanical response across a range of volume percent glass/iron filler by using only the neat and highly loaded MD predictions as input. This provides a faster and more efficient approach than creating multiple MD models per volume percent per polymer/filler combination. To validate the micromechanics predictions, experimental samples incorporating hollow glass microspheres (MS) and carbonyl iron particles (CIP) into PLA/PETG were developed and tested for elastic modulus. The CIP produced a larger reinforcement in elastic modulus than the MS, with similar increases in elastic modulus between PLA/CIP and PETG/CIP at 7.77 vol % CIP. The micromechanics-based mechanical predictions compare excellently with the experimental values, validating the integrated micromechanical/MD simulation-based approach.

show abstract

“…The NASA Glenn Research Center developed a micromechanics tool called Micromechanics Analysis Code based on the Generalized Method of Cells (MAC/GMC) that contains a module called the MSGMC or MultiScale Generalized Method of Cells that is capable of coupling an arbitrary number of representative unit cells (of arbitrary complexity) across many length scales to determine thermomechanical properties of the overall multiscale structure. The MAC/GMC and MSGMC computational techniques have been validated across multiple studies. ,,− …”

Section: Introductionmentioning

confidence: 99%

Multiscale Modeling of Polyamide 6 Using Molecular Dynamics and Micromechanics

Pisani

Newman

Shukla

2021

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

Polyamide 6 (PA6) is a semicrystalline thermoplastic used in many engineering applications due to its high strength, good chemical resistance, and excellent wear/abrasion resistance. The mechanical properties of PA6 are dependent on two forms of crystallinity (α/γ). Semicrystalline thermoplastics have a hierarchical microstructure spanning length scales, necessitating the use of a multiscale model. Molecular dynamics (MD) simulation with the reactive INTERFACE force field was used to predict the elastic moduli of amorphous PA6. Semicrystalline PA6 was modeled using a multiscale modeling approach originally developed for semicrystalline polyetheretherketone (PEEK). This approach was facilitated by the NASA Glenn Research Center’s micromechanics software MAC/GMC. The inputs to the multiscale model were the elastic moduli of amorphous PA6, as predicted via MD and calculated stiffness matrices from the literature of the PA6 α and γ crystal forms. The multiscale model output was Young’s modulus, shear modulus, and Poisson’s ratio as a function of α and γ crystallinity. The predicted values of Young’s modulus and shear modulus compared well with experiment. The multiscale model predictions showed that the mechanical properties of semicrystalline PA6 with α and γ crystal forms are similar from amorphous to 40% crystalline and diverge after this limit, with the γ PA6 predictions having higher Young’s and shear moduli and lower Poisson’s ratio. Overall, the good agreement with experiment validated the use of the multiscale model for semicrystalline PA6, proving that the multiscale model may be used for semicrystalline polymers beyond PEEK.

show abstract

Modeling-Driven Damage Tolerant Design of Graphene Nanoplatelet/Carbon Fiber/Epoxy Hybrid Composite Panels for Full-Scale Aerospace Structures

Cited by 7 publications

References 17 publications

From Protosolar Space to Space Exploration: The Role of Graphene in Space Technology and Economy

From Protosolar Space to Space Exploration: The Role of Graphene in Space Technology and Economy

Micromechanical Dilution of PLA/PETG–Glass/Iron Nanocomposites: A More Efficient Molecular Dynamics Approach

Multiscale Modeling of Polyamide 6 Using Molecular Dynamics and Micromechanics

Contact Info

Product

Resources

About