Multiscale analysis of multi-directional composite laminates to predict stiffness and strength in the presence of micro-defects

Bhattacharyya, Rudraprasad; Adams, Douglas E.

doi:10.1016/j.jcomc.2021.100189

Cited by 7 publications

(4 citation statements)

References 44 publications

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“…The marginal decrease in tensile strength may be due to the presence of cracks, highly rough regions, collapse of voids and higher values of fiber loadings. 40…”

Section: Resultsmentioning

confidence: 99%

“…The marginal decrease in tensile strength may be due to the presence of cracks, highly rough regions, collapse of voids and higher values of fiber loadings. 40 Fiber addition is directly proportional to an increase in the value of the modulus of elasticity. Therefore, the value of the modulus of elasticity rises gradually.…”

Section: Tensile Testing Of Developed Compositesmentioning

confidence: 99%

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Industrial approach to circularity of polymer composites: Processing, characterization, mechanical testing, and wear regression

Hussain

Podgursky

Goljandin

et al. 2023

Journal of Reinforced Plastics and Composites

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Cotton, polyester, and polyethylene terephthalate are the most common types of polymers that produce huge wastes. The circularity of these post-consumer (PC) waste faces operational problems during processing. In this innovative research, the relationship between circularity, surface characterization, mechanical and tribological testing of fiber reinforced (cotton, polyester), and particulate (polyethylene terephthalate) composites is explored for industrial pilot production. Cutting model can control the size of fibers during grinding. The fiber reinforced composites (FRCs) with 10% (by weight) fiber loadings are found as operational candidates for structural, automotive, and medical applications due to suitable tensile strength (26–29 MPa), percentage of extension (10%) and abrasive wear (3 × 10−6 mm3/Nm). An increase in fiber content produces micro-defects like asperities, rough areas, voids, cracks, and pits in recycled composites. Therefore, the particulate and FRCs with 40% (by weight) fiber loadings become hard and brittle. However, these composites (especially with 40% wt. fiber loadings) exhibit reasonable elastic modulus (1526–2751 MPa) and abrasive wear (6.5 × 10−6 mm3/Nm). The ductile to brittle transition effect has appeared in all composites (with 30% wt. fiber content) due to continuous fiber addition, micro-defects creation and dual phase presence. In conclusion, natural and synthetic PC wastes can be utilized for sustainable processing of commercial polymer composites. Moreover, injection molding, polymer characterization, tensile testing, abrasion evaluation, and regression analysis can be introduced for the transformation of open-loop into closed-loop manufacturing.

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“…The marginal decrease in tensile strength may be due to the presence of cracks, highly rough regions, collapse of voids and higher values of fiber loadings. 40…”

Section: Resultsmentioning

confidence: 99%

Section: Tensile Testing Of Developed Compositesmentioning

confidence: 99%

Industrial approach to circularity of polymer composites: Processing, characterization, mechanical testing, and wear regression

Hussain

Podgursky

Goljandin

et al. 2023

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

show abstract

“…6 Recent efforts have attempted to consider the mechanical behaviour at multiple scales for the continuum simulation of damage in FRPs. [7][8][9][10] Clay and Engelstad 11 benchmarked various progressive damage models to provide an overview of current state-of-the-art computation techniques.…”

Section: Introductionmentioning

confidence: 99%

Meshfree simulation of progressive damage in composite laminates using discrete element analysis

Reiner

Nguyen

2023

Journal of Composite Materials

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This study presents a Discrete Element Method (DEM) for a meshfree progressive failure analysis of IM7/8552 carbon fibre reinforced polymer laminates at the macroscale. By implementing a cohesive contact model to describe progressive damage, experimental results from over-height compact tension (OCT) tests are used to calibrate the required input parameters in the DEM contact model. The simulation of various open-hole tension (OHT) test specimens validates the presented DEM model with minimal errors in strength predictions of up to 4%. Discrete Element Method results are directly compared to those obtained from finite element (FE) models. It is demonstrated that DEM is able to seemingly incorporate damage evolution leading to realistic macroscopic damage patterns, however the computational cost is increased by a factor of 100 compared to FE simulations.

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“…6 For the micromechanical models, just constituents' properties are used as input and great advances in analytical modeling have been achieved recently for effective elastic properties [7][8][9][10][11] and strengths. [12][13][14][15][16][17] However, there are some drawbacks related to micromechanical analysis for strengths: fiber-matrix interface debonding has an important influence and it cannot be measured directly without laminate manufacture, 18 the fiber nonuniform distribution may have significant influence, 19,20 and the influence of voids 21 and other manufacture defects. 22 Some issues can be fixed by solving an inverse problem, i.e.…”

Section: Introductionmentioning

confidence: 99%

Is the out-of-plane shear strength an independent property? A micromechanical perspective about a macromechanical question

Vignoli

2023

Journal of Composite Materials

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For unidirectional laminae, five elastic properties and six strengths are usually required. The goal of this paper is to evaluate if the out-of-plane shear strength is really an independent property or if it is somehow related to the transversal tensile and compressive strengths. The analytical VSPKc micromechanical model is used to derive closed-form relations. Fiber-matrix interface failure due to normal and shear interface tractions is evaluated considering a perfectly brittle behavior. The proposed model is compared with four analytical models from the literature and their estimations are verified against six experimental data. The relations proposed obtained the best results compared with the experimental data, with an average error equal to 8.84%, while the error using the second-ranked model is 17.40%, indicating with good reliability that the out-of-plane shear strength is not an independent property.

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Multiscale analysis of multi-directional composite laminates to predict stiffness and strength in the presence of micro-defects

Cited by 7 publications

References 44 publications

Industrial approach to circularity of polymer composites: Processing, characterization, mechanical testing, and wear regression

Industrial approach to circularity of polymer composites: Processing, characterization, mechanical testing, and wear regression

Meshfree simulation of progressive damage in composite laminates using discrete element analysis

Is the out-of-plane shear strength an independent property? A micromechanical perspective about a macromechanical question

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