Abrasive waterjet hole trepanning of thick Kevlar-epoxy composites for ballistic applications – experimental investigations and analysis using design of experiments methodology

2011 ◽  
Vol 10 (3) ◽  
pp. 172 ◽  
Author(s):  
Tauseef Uddin Siddiqui ◽  
Mukul Shukla
Keyword(s):  
Design Of Experiments ◽  
Epoxy Composites ◽  
Abrasive Waterjet ◽  
Experimental Investigations

Experimental investigations on high precision abrasive waterjet cutting of natural fibre reinforced nano clay filled green composites

2020 ◽  
pp. 152808372094296
Author(s):  
D Rajamani ◽  
E Balasubramanian ◽  
G Dilli Babu ◽  
K Ananthakumar
Keyword(s):  
Composite Laminates ◽  
Removal Rate ◽  
Traverse Speed ◽  
Natural Fibre ◽  
Abrasive Waterjet ◽  
Experimental Investigations ◽  
Waterjet Cutting ◽  
Abrasive Waterjet Cutting ◽  
Nano Clay ◽  
Cut Quality

The present investigation focused on abrasive waterjet cutting (AWJC) of natural fibre reinforced nano clay filled polyester composites with the objectives of maximizing material removal rate ( MRR) and minimizing the kerf taper ( KT) and surface roughness ( Ra). The influence of nano clay addition, traverse speed (TS), jet pressure (JP) and stand-off distance (SOD) on the AWJC characteristics of fabricated composite laminates are investigated. The natural fibre reinforced composite (NFRC) laminates are fabricated through hand lay-up technique through varying the wt% of nano clay fillers (0, 1 and 2). The AWJC experiments are planned and rigorous experiments were performed by adopting box-behnken design approach. The relative consequence of process variables on response features and quadratic regression models were assessed through analysis of variance (ANOVA). Further, multiple response optimization is carried out using statistical desirability technique to enhance the cut quality characteristics. The optimal AWJC parameters such as JP of 316.24 MPa, SOD of 2 mm and TS of 304.24 mm/min with 1.15 wt% of nano clay addition are determined. Microstructure of cut surface is examined to ascertain the morphological behaviour of AWJC surfaces with different processing conditions.

scholarly journals Reuse of abrasive particles in abrasive waterjet cutting

Mechanik ◽  
2017 ◽  
Vol 90 (1) ◽  
pp. 62-63
Author(s):  
Daniel Krajcarz ◽  
Sławomir Spadło
Keyword(s):  
Aluminium Alloy ◽  
Surface Quality ◽  
Geometrical Structure ◽  
Abrasive Waterjet ◽  
Experimental Investigations ◽  
Abrasive Particles ◽  
Waterjet Cutting ◽  
Abrasive Grains ◽  
Abrasive Waterjet Cutting ◽  
Cutting Surface

Presented is the possibility of reuse abrasive grains in abrasive waterjet cutting. The disintegration particles of garnet # 80 used to create a new abrasive garnet, corresponding to the fresh garnet # 120. In order to determine the ability of cutting recycling abrasive grains was carried out the aluminium alloy cutiing by using fresh and recycling garnet # 120. The experimental investigations of cutting surface quality focused on evaluation of surface geometrical structure.

Modeling of Depth of Cut in Abrasive Waterjet Cutting of Thick Kevlar-Epoxy Composites

2010 ◽  
Vol 443 ◽  
pp. 423-427 ◽  
Author(s):  
Tauseef Uddin Siddiqui ◽  
Mukul Shukla
Keyword(s):  
Polymer Matrix Composites ◽  
Linear Regression Analysis ◽  
Epoxy Composites ◽  
Abrasive Waterjet ◽  
Depth Of Cut ◽  
Matrix Composites ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
Semi Empirical ◽  
Good Agreement

Abrasive water jet cutting (AWJC) is one of the widely used non-conventional techniques for cutting difficult-to-cut materials like composites, super alloys and ceramics. However, while conducting initial trials the inability of the jet to cut through the workpiece is a major problem particularly in thicker materials. Therefore an accurate prediction of depth of cut (DOC) is absolutely necessary to achieve through cuts and more so to minimize delamination in polymer matrix composites. In this paper, a semi-empirical model is developed using non-linear regression analysis for prediction of DOC in AWJC of thick Kevlar-epoxy composites. Further, the model is verified by conducting experiments within the investigated range of process parameters and a good agreement is obtained between the two.

scholarly journals Experimental Investigations into Abrasive Waterjet Machining of Carbon Fiber Reinforced Plastic

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Prasad D. Unde ◽  
M. D. Gayakwad ◽  
N. G. Patil ◽  
R. S. Pawade ◽  
D. G. Thakur ◽  
...  
Keyword(s):  
Material Removal Rate ◽  
Fiber Orientation ◽  
Material Removal ◽  
Removal Rate ◽  
Machining Process ◽  
Abrasive Waterjet ◽  
Experimental Investigations ◽  
Abrasive Waterjet Machining ◽  
Kerf Taper ◽  
Waterjet Machining

Abrasive waterjet machining (AWJM) is an emerging machining process in which the material removal takes place due to abrasion. A stream of abrasive particles mixed with filtered water is subjected to the work surface with high velocity. The present study is focused on the experimental research and evaluation of the abrasive waterjet machining process in order to evaluate the technological factors affecting the machining quality of CFRP laminate using response surface methodology. The standoff distance, feed rate, and jet pressure were found to affect kerf taper, delamination, material removal rate, and surface roughness. The material related parameter, orientation of fiber, has been also found to affect the machining performance. The kerf taper was found to be 0.029 for 45° fiber orientation whereas it was 0.036 and 0.038 for 60° and 90°, respectively. The material removal rate is 18.95 mm3/sec for 45° fiber orientation compared to 18.26 mm3/sec for 60° and 17.4 mm3/sec for 90° fiber orientation. The Ra value for 45° fiber orientation is 4.911 µm and for 60° and 90° fiber orientation it is 4.927 µm and 4.974 µm, respectively. Delamination factor is found to be more for 45° fiber orientation, that is, 2.238, but for 60° and 90° it is 2.029 and 2.196, respectively.

Experimental Investigations on Drilling Characteristics of Cenosphere Reinforced Epoxy Composites

2015 ◽  
Vol 766-767 ◽  
pp. 801-811 ◽  
Author(s):  
S.B. Angadi ◽  
Rashmi Melinamani ◽  
V.N. Gaitonde ◽  
Mrityunjay Doddamani ◽  
S.R. Karnik
Keyword(s):  
Surface Roughness ◽  
Response Surface Methodology ◽  
Epoxy Resin ◽  
Response Surface ◽  
Epoxy Composites ◽  
Experimental Investigations ◽  
The Matrix ◽  
Drill Diameter ◽  
Full Factorial ◽  
Quadratic Models

In the present paper, the experimental investigations on drilling characteristics of cenosphere reinforced epoxy composites with cemented carbide drill have been presented. The drilling aspects such as thrust and hole surface roughness have been performed as function of four process parameters, namely, spindle speed, feed rate, drill diameter and % weight of the filler. Composite specimens were prepared with 20%, 40% and 60% by weight of cenosphere filler in epoxy resin as the matrix. The full factorial design (FFD) has been employed for conducting drilling experiments and the proposed drilling characteristics were analysed using response surface methodology (RSM) based quadratic models. The response surface analysis reveals that the addition of cenosphere as filler in epoxy resin appreciably decreases with the thrust and hole surface roughness for the developed composites.

scholarly journals Experimental investigations with eco-friendly refrigerants using design of experiments technique-mathematical modeling and experimental validation

2014 ◽  
Vol 18 (suppl.2) ◽  
pp. 363-374 ◽  
Author(s):  
Kolandavel Mani ◽  
Vellappan Selladurai ◽  
Natarajan Murugan
Keyword(s):  
Mathematical Modeling ◽  
Design Of Experiments ◽  
Performance Prediction ◽  
Experimental Validation ◽  
Coefficient Of Performance ◽  
Experimental Investigations ◽  
Hydrocarbon Mixture ◽  
Refrigeration System ◽  
System Parameters ◽  
Vapour Compression

In this paper mathematical models were developed using design of experiments technique for the performance prediction of refrigeration system parameters such as refrigerating capacity, power consumption and coefficient of performance. The models developed were checked for their adequacy using F-test. The performances of vapour compression refrigeration system with different refrigerants R12, R134a and R290/R600a were compared. The R290/R600a mixture showed 10.7-23.6% higher coefficient of performance than that with R12 and R134a and it was found that the hydrocarbon mixture with 68% propane and 32% iso-butane could be used as a substitute for R12 and R134a.

Sign in / Sign up

Export Citation Format

Share Document