Stress transfer and damage evolution simulations of fiber-reinforced polymer–matrix composites

Li, Hongzhou; Jia, Yuxi; Geni, Mamtimin; Jiang, Wei; An, Lijia

doi:10.1016/j.msea.2006.03.086

Cited by 29 publications

(12 citation statements)

References 18 publications

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“…Based on the Mori–Tanaka model,33, 34 the modulus of the PS/PP/clay nanocomposite was calculated as 2960 MPa. Considering a Poisson's ratio of 0.3639 of the dispersed phase, the modulus of the blend/clay nanocomposite was calculated from the Christensen model38 as 2819 MPa. The theoretical values for the elastic modulus of the PS/PP/clay nanocomposite are depicted in Figure 10 for comparison with the experimental datum.…”

Section: Resultsmentioning

confidence: 99%

Structure–property relationships of polymer blend/clay nanocomposites: Compatibilized and noncompatibilized polystyrene/propylene/clay

Istrate

Gunning

Higginbotham

et al. 2011

J Polym Sci B Polym Phys

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Polymer blends represent an important class of materials in engineering applications. The incorporation of clay nanofiller may provide new opportunities for this type of materials to enhance their applications. This article reports on the effects of clay on the structure and properties of compatibilized and noncompatibilized polymer blends and presents a detailed process for quantitative analysis of the elastic moduli of polymer blend/clay nanocomposites, based on immiscible polystyrene/polypropylene (PS/PP) blends with or without maleated PP as the compatibilizer. The results show that in the noncompatibilized PS/PP/clay nanocomposite clay locates solely in the PS phase, whereas in the compatibilized nanocomposite clay disperses in both phases. The addition of clay to both polymer blends reduces the domain size significantly, modifies the crystallinity and improves the stiffness. The Mori-Tanaka and Christensen's models offer a reasonably good prediction of the elastic moduli of both types of nanocomposites. V C 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 50: 431-441, 2012

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Section: Resultsmentioning

confidence: 99%

Structure–property relationships of polymer blend/clay nanocomposites: Compatibilized and noncompatibilized polystyrene/propylene/clay

Istrate

Gunning

Higginbotham

et al. 2011

J Polym Sci B Polym Phys

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“…The stress field near the crack tip was studied excellently by these researchers using simplified symmetrical models subjected to simple loading conditions with pre-damage, but the propagation of the damage was ignored. Some other outstanding researchers have developed many numerical and analytical statistical strength models, [18][19][20] including the formation of cracks (fiber breakages) without successive propagation. Techniques such as photoelastic microscopy, [21][22][23][24][25][26][27][28][29] Raman spectroscopy [30][31][32][33] and fluorescence spectroscopy [34][35][36] have been used to examine the fibrous composites failure process.…”

Section: Full Papermentioning

confidence: 99%

“…Microdamage analysis of fibrous composites has received considerable attention in recent years. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Herrera-Franco et al studied radial stresses at the interface during the fiber pulled out from the droplet using FEA analysis. [5] Sirivedin et al derived an analytical expression to estimate the…”

Section: Introductionmentioning

confidence: 99%

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Influence of Interfacial Properties on Crack Propagation in Fiber‐Reinforced Polymer Matrix Composites

Sun

Jia

et al. 2008

Macro Materials & Eng

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Dynamic crack propagation routes in composites were investigated using numerical methods. The interfacial strength was characterized by means of the interfacial nodal constrained failure. Five different micro‐damage modes around a broken fiber and the corresponding stress/strain curves were obtained with the interfacial strength increasing. It was proved that the shear stress concentration region appears to be different as the interface varying from weak to strong and that the recovery of fiber load‐supporting with a strong interface is better than that with a weak interface. Experimental work has been done and the available results agree well with corresponding simulation results.

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“…Therefore, it is necessary to conduct reliable numerical simulations to evaluate the mechanical behavior of nanoindentation on an elastic–plastic microspherical material. The numerical simulations are usually carried out via the finite element method [ 14 – 25 ]. Using finite element simulation, Li et al found that both loading curve and unloading curve at any depth can be generated from one indentation depth by scaling P ∝ h 2 for the indentation tests of PMMA thin films with a Berkovich indenter [ 1 – 2 ].…”

Section: Introductionmentioning

confidence: 99%

Determination of elastic moduli of elastic–plastic microspherical materials using nanoindentation simulation without mechanical polishing

Li¹,

Chen²

2021

Beilstein J. Nanotechnol.

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When using the Oliver–Pharr method, the indented specimen is assumed to be a perfectly flat surface, thus ignoring the influences of surface roughness that might be encountered in experiment. For nanoindentation measurements, a flat surface is fabricated from curved specimens by mechanical polishing. However, the position of the polished curved surface cannot be controlled. There are no reliable theoretical or experimental methods to evaluate the mechanical behavior during nanoindentation of an elastic–plastic microsphere. Therefore, it is necessary to conduct reliable numerical simulations to evaluate this behavior. This article reports a systematic computational study regarding the instrumented nanoindentation of elastic–plastic microspherical materials. The ratio between elastic modulus of the microsphere and the initial yield stress of the microsphere was systematically varied from 10 to 1000 to cover the mechanical properties of most materials encountered in engineering. The simulated results indicate that contact height is unsuitable to replace contact depth for obtaining the indentation elastic modulus of microspherical materials. The extracted elastic modulus of a microsphere using the Oliver–Pharr method with the simulated unloading curve depends on the indentation depth. It demonstrates that nanoindentation on microspherical materials exhibits a “size effect”.

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Stress transfer and damage evolution simulations of fiber-reinforced polymer–matrix composites

Cited by 29 publications

References 18 publications

Structure–property relationships of polymer blend/clay nanocomposites: Compatibilized and noncompatibilized polystyrene/propylene/clay

Structure–property relationships of polymer blend/clay nanocomposites: Compatibilized and noncompatibilized polystyrene/propylene/clay

Influence of Interfacial Properties on Crack Propagation in Fiber‐Reinforced Polymer Matrix Composites

Determination of elastic moduli of elastic–plastic microspherical materials using nanoindentation simulation without mechanical polishing

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