Evaluation of abrasive water jet drilling parameters on open-hole tensile strength in flax composites

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In recent years, bio-based composites made from natural fibres such as flax, jute, coconut fibre, etc. have been incorporated in different sectors including automotive and construction. This is mainly attributed to its unique characteristics such as lightweight, biodegradability, low carbon emissions and fast growth cycle of raw materials. Bio-based composites can replace parts made from traditional metals or synthetic-based composites. Such parts typically require machining operations for assembly purposes using a conventional drilling (CD) process. CD is widely used for making holes in composite structures, but it poses some limitations related to the acceleration of tool wear, undesirable thermal effects, and respiratory hazards. An alternative approach is to employ non-conventional drilling techniques that mitigate some or all limitations. Abrasive water jet drilling (AWJD) is an excellent candidate for drilling bio-based composites since it is a thermal-free machining process. However, the hydrophilic nature of bio-based composites can influence the hole quality and overall performance of machined parts. Thus, this work studies the effect of water jet pressure (WJP: 1000 bar), traverse speed (TS: 10, 25, 50, 75 and 100 mm/min), abrasive mass flow rate (AMFR: 200 g/min), and stand-off distance (SOD: 2 mm) on the
hole quality parameters namely surface roughness (Ra), hole size, kerf taper and open-hole tensile strength of woven flax composites. Digital image correlation (DIC) was employed to analyse surface displacement, strain of structure, and fatigue failure process of samples by measuring the change of strain field. The results show that only minor damage occurs on the entry and exit surfaces. The results obtained indicate that the TS has a significant effect a minor effect on the hole-quality parameters and a negligible effect on the open-hole tensile strength. In particular, the hole size (D) and difference in D at the entry and exit (ΔD).
Original languageEnglish
Title of host publicationECCM21: Proceedings of the 21st European Conference on Composite Materials
Subtitle of host publicationVolume 5: Maunfacturing
PublisherThe European Society for Composite Materials
Pages524-531
Number of pages8
ISBN (Print)9782912985019
DOIs
Publication statusPublished - 5 Jul 2024
Event21st European Conference on Composite Materials (ECCM21), Nantes, France, July 2-5, 2024 - Nantes, France
Duration: 2 Jul 20245 Jul 2024
http://www.eccm21.org

Conference

Conference21st European Conference on Composite Materials (ECCM21), Nantes, France, July 2-5, 2024
Country/TerritoryFrance
CityNantes
Period2/07/245/07/24
Internet address

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