Conditions leading to the embedding of angular and spherical particles during the solid particle erosion of polymers

Getu, H.; Spelt, J.K.; Papini, M.

doi:10.1016/j.wear.2012.05.017

Cited by 52 publications

(54 citation statements)

References 43 publications

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“…where m and Vp are the impacting spherical particle mass and velocity, respectively, and V is the volume of the resulting spherical crater [77] = ( 6)…”

Section: Dynamic Hardness Measurementmentioning

confidence: 99%

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Predicting Surface Roughness and Delamination When Abrasive Waterjet Machining Fiber Reinforced Polymer Composites

Schwartzentruber¹

2023

Preprint

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The machining of composite materials is difficult because of their non-homogenous structure and their constituents commonly possess a high resistance to cutting. Abrasive waterjet machining (AWJM) is more attractive for composite substrates than conventional machining techniques because of its ability to rapidly machine a wide variety of materials with low reactionary forces on the workpiece, and without creating a heat-affected zone. However, AWJM is prone to producing variable surface roughness and delamination. This dissertation aimed to model these surface roughness and delamination mechanisms. The thesis presents 2D and 3D roughness models capable of predicting the surface roughness during abrasive waterjet (AWJ) trimming of composite substrates. The models were able to predict the measured surface roughness with an average error of 10% and 16%, for the 2D and 3D models, respectively. The thesis also presents experimental and numerical results characterizing the delamination when AWJ piercing and cutting a carbon-fiber/epoxy laminate. Fluid-structure interaction (FSI) models created to simulate the piercing process showed that interlaminar delamination was due to the hydraulic shock (‘water hammer’) associated with liquid jet impact. As expected, increased pressure and nozzle size resulted in ply debonding, and was experimentally verified using 3D x-ray micro-tomography. The composite anisotropy was found to produce an asymmetric shock loading along the liquid-solid interface, which contributed to the asymmetric delamination. The FSI model showed that delamination when cutting carbon-fiber/epoxy depended primarily on the normal interlaminar stress, with relatively large damage zones occurring ahead of the cutting front. This trend was also observed in x-ray micro-tomographs of an AWJ cut. The amount of delamination across different process parameters was also measured using a moisture uptake methodology, and showed that increase traverse speed, increased nozzle size, and decreased abrasive flow rate, increased delamination. Prediction and characterization of surface roughness and delamination when AWJM will allow further improvement of cut-surface finish and structural integrity of composite materials, respectively

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“…where m and Vp are the impacting spherical particle mass and velocity, respectively, and V is the volume of the resulting spherical crater [77] = ( 6)…”

Section: Dynamic Hardness Measurementmentioning

confidence: 99%

“…Similar to the particle embedment studies of Getu et al [77], the dimensions (D, d) and angularity (A1, A2) of the idealized rhomboids used to model the actual particles (Fig. 2.7) were based on the particle size (Fig.…”

Section: Particle Size Angularity and Orientationmentioning

confidence: 99%

Predicting Surface Roughness and Delamination When Abrasive Waterjet Machining Fiber Reinforced Polymer Composites

Schwartzentruber¹

2023

Preprint

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“…The major axis of the abrasive particle is intentionally lengthened to alleviate the lateral resistance from the target plate. 18 Three cases with three different incident angles of the abrasive particle are examined, as shown schematically in Figure 2.…”

Section: Geometrical Modelsmentioning

confidence: 99%

A numerical and experimental study of oblique impact of ultra-high pressure abrasive water jet

Kang

Liu

et al. 2016

Advances in Mechanical Engineering

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An investigation of the abrasive water jet with an emphasis on the oblique impact of abrasive particles on the target plate is performed. Ultra-high jet pressure necessitates a close examination of the phenomena featured by small spatial and temporal scales. The effect of oblique impact is assessed from both numerical and practical aspects. Numerical simulation, implemented using the commercial code LS-DYNA, allows a detailed inspection of transient stress wave propagation inside the target plate. And impact experiments facilitate a qualitative description of resultant footprints of oblique water jet. Different incident angles of abrasive particles are adopted and a comparison is thereby unfolded. The results indicate that rebound, embedding, and penetration of single abrasive particle are three representative final operation states. Adjacent to the abrasive particle, the response of the target plate to oblique impact is reflected by von Mises stress distribution and plate deformation as well. Oblique impact arouses non-symmetrical stress wave distributions and distinct unbalanced node displacements at the two sides of the abrasive particle. As for the target plate, global surface morphology is in accordance with predicted effects. The most favorable surface roughness is not associated with vertical impact, and it hinges upon the selection of standoff distance. Furthermore, variation of surface roughness with incident angle is not monotonous.

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“…Routara et al [4] considered the Grey Taguchi analysis for finding the optimal machining parameters of AJM on the glass work piece. Embedding of erodent particles was examined by Getu et al [5] by impacting angular garnet grains on materials like acrylonitrile butadiene styrene polymethyl-methacrylate and polyethylene. Domiaty et al [6] verified the results of experiments with the mathematical models for drilling of glass pieces with AJM.…”

Section: Introductionmentioning

confidence: 99%

Abrasive Jet Drilling Of Glass using Normal-bed and Fluidized-bed AJM Setup

Nanda,

Das*,

Routara

et al. 2020

IJITEE

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Abrasive Jet Machining (AJM) is a promising unconventional modern machining process used to machine hard and brittle materials. This paper focuses on machining of borosilicate-glass work piece with various grits of zircon abrasives using normal and fluidised bed mixing chamber based AJM setups.The normal AJM setup is first designed and fabricated to conduct the experiments according to the Box-Behnken design of response surface methodology. Again, some modifications are made in the existing normal mixed chamber to fabricate the fluidized bed mixing chamber based AJM setup and experiments are carried out with the same input parameters on both the AJM setups. The SEM micrograph analysis is performed to study the impact-mechanism and crack-propagation due to AJM.

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Conditions leading to the embedding of angular and spherical particles during the solid particle erosion of polymers

Cited by 52 publications

References 43 publications

Predicting Surface Roughness and Delamination When Abrasive Waterjet Machining Fiber Reinforced Polymer Composites

Predicting Surface Roughness and Delamination When Abrasive Waterjet Machining Fiber Reinforced Polymer Composites

A numerical and experimental study of oblique impact of ultra-high pressure abrasive water jet

Abrasive Jet Drilling Of Glass using Normal-bed and Fluidized-bed AJM Setup

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