An improved orthotropic elasto-plastic damage model for plain woven composites

Gupta, Mohit; Singh, Harinder; Khan, Ashraf Nawaz; Mahajan, Puneet; Prabhakaran, R.T. Durai; Alagirusamy, R.

doi:10.1016/j.tws.2021.107598

Cited by 15 publications

(11 citation statements)

References 24 publications

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“…Figure 5 illustrates the interlaminar damage extension process of the laminate at an impact energy of 15J. In Figure 5(a), the initial damage state in unreinforced laminates is circular, which gradually expands in the 0° and 90° directions along the longitudinal and latitudinal directions of the material, and finally shows a circular damage distribution, which is consistent with the description in [8]. For the Zpin reinforced laminate, as shown in Figure 5(c), the strength of the Cohesive elements in the Z-pin region is higher than that in the unreinforced region.…”

Section: Low Velocity Impact Finite Element Resultssupporting

confidence: 81%

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Research on low-velocity impact characteristics of Z-pin reinforced quartz/phenolic laminates

Li,

Jin

2023

J. Phys.: Conf. Ser.

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The problem of in-plane damage caused by dynamic impact loading of composite laminates can be enhanced by implanting Z-pins. The effect of Z-pin implantation on the impact resistance of composite laminates is investigated experimentally, and the damage process is analyzed by establishing a low-velocity impact finite element model of Z-pin reinforced laminates. The test results show that the maximum impact contact force of Z-pin reinforced laminates can be increased by 8.23%, and the maximum contact force and absorbed energy of Z-pin reinforced samples both increase gradually with the increase of impact energy. The simulation results show that with the increase of impact energy, the expansion of impact damage is hindered by the Z-pin, and it reduces in-plane matrix damage. The expansion path of the interlaminar crack changes when it reaches the Z-pin enhancement area, and the shape of the interlaminar damage changes from circular to elliptical.

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Section: Low Velocity Impact Finite Element Resultssupporting

confidence: 81%

“…The impactor is modeled using isotropic 3D solid elements and is constrained as a rigid body, with a predefined downward velocity assigned to the constrained point. The parameters involved in the simulation are obtained from [8][9][10] and experiments [11].…”

Section: Analysis Of Simulation Resultsmentioning

confidence: 99%

Research on low-velocity impact characteristics of Z-pin reinforced quartz/phenolic laminates

Li,

Jin

2023

J. Phys.: Conf. Ser.

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“…Micro‐Computed Tomography (Micro‐CT) is a technique to study the microstructure of materials such as metals, alloys, 9 trabecular and cortical bones, 10 foams, 11 bone‐implant interface 12 and composites 13 . The micro‐CT enables a non‐detructive characterisation of morphometric parameters of porous structures and the qualitative analysis of the deformation behaviour of porous structures using undeformed and deformed 3D images 14 …”

Section: Introductionmentioning

confidence: 99%

“…8 Micro-Computed Tomography (Micro-CT) is a technique to study the microstructure of materials such as metals, alloys, 9 trabecular and cortical bones, 10 foams, 11 bone-implant interface 12 and composites. 13 The micro-CT enables a non-detructive characterisation of morphometric parameters of porous structures and the qualitative analysis of the deformation behaviour of porous structures using undeformed and deformed 3D images. 14 In addition to the above, micro-CT also enhanced the development of an image-based finite element model at the micro-level (micro-FE), where the microstructure could be replicated in numerical modelling.…”

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confidence: 99%

Evaluation of compressive behaviour of porous structures under large deformation using micro‐CT, DVC and micro‐FE

Sriram

Mahajan

Ahmad

et al. 2023

Strain

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Compressive behaviour of open and closed cell polyurethane foam samples under large deformation is studied using micro-Computed Tomography (micro-CT), Digital Volume Correlation (DVC) technique and micro-Finite Element (micro-FE) modelling. The micro-CT images of the foam samples at different compression strains are used to determine anisotropy in the foams, to obtain qualitative information on deformation mechanisms, to quantify the deformation and strains using a local DVC approach and to generate images for micro-FE modelling of the foam samples. Micro-FE modelling predicts the deformation using an elastoplastic material model coupled with continuum damage mechanics. Two different types of boundary conditions, experimentally derived (ExBC) and interpolated from DVC (IPBC), were implemented to evaluate the displacements in the micro-FE models. A reduced integration scheme in micro-FE analysis resulted in high artificial energy and was discarded in favour of full integration. The displacement predicted by IPBC matched with DVC displacement contours for closed cell foam. The ExBCpredicted axial displacement (W) showed a better agreement with DVC than transverse displacements (U, V) contours. However, a significant statistical comparison (R 2 > 0.70) of all displacements was obtained for both IPBC andExBC. For open cell foam, both boundary conditions predicted a significant difference in the displacement contours with respect to DVC measurements.Still, the axial displacements of ExBC and IPBC showed a better statistical significance (R 2 > 0.70).

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“…10 These attributes along with recyclability, nonemission of volatile organic compounds, unlimited shelf life at room temperature, ease of processing as well as ease of handling are paving the way for the thermoplastic matrices in the composite industry as an alternative to thermoset matrices. [11][12][13][14][15][16][17] However, the thermoplastic composite turns out to be expensive when concerned with the quality of the impregnation (using traditional techniques for thermoset resins-hand lay-up, a spray method, sheet molding, bulk molding, resin transfer molding, vacuum bagging, etc.) of resin into the fibers as a result of its markedly higher viscosity.…”

Section: Introductionmentioning

confidence: 99%

Optimization study on wet electrostatic powder coating process to manufacture UHMWPE/LDPE towpregs

Khan

Goud

Alagirusamy

et al. 2022

Journal of Industrial Textiles

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In the present study, an attempt has been made to coat the non-conductive Ultra-high Molecular Weight Polyethylene (UHMWPE) fibers with Low-Density Polyethylene (LDPE) powder. In order to enable the deposition of electrostatically charged LDPE powder onto the fiber surface, UHMWPE fibers are dipped into a surface modification bath to impart momentary conductivity. Further, Box Behnken’s experimental design is used to optimize the processing parameters for Fiber Volume Fraction (Vf) for this wet electrostatic spray coating process. An experimental multi-parametric equation is acquired through response surface methodology to ascertain the association amid the process parameters such as processing temperature (A), conveying air pressure (B), and gun nozzle angle (C) on the output response of Vf. The process parametric values for A, B, and C are varied from 225°C to 245°C, 0.2 bar to 0.4 bar, and 0° to 120° respectively. The Vf obtained is in the range of 37.02%–56.28% depending on the combination of process parametric values. Powder pick-up increases with an increase in the gun nozzle angle. An increase in conveying air pressure and temperature of the hot air oven leads to an increase in powder deposition. The values predicted from the model are observed to be in close proximity (94.59%) to the experimental results. Gun nozzle angle is the principal parameter affecting the matrix deposition on the fiber surface in comparison to other process parameters.

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An improved orthotropic elasto-plastic damage model for plain woven composites

Cited by 15 publications

References 24 publications

Research on low-velocity impact characteristics of Z-pin reinforced quartz/phenolic laminates

Research on low-velocity impact characteristics of Z-pin reinforced quartz/phenolic laminates

Evaluation of compressive behaviour of porous structures under large deformation using micro‐CT, DVC and micro‐FE

Optimization study on wet electrostatic powder coating process to manufacture UHMWPE/LDPE towpregs

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