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<p>The advancement in using ecofriendly light weight composites in the field of aerospace, automotive, chemical, medical and commercial applications are fulfilled because of the inherent specifications of reinforcements and matrix those used to make composites. However, the conventional drilling on these composites is still challenging one due to the higher rejection rate at the assembly point. Unconventional drilling using abrasive water jet machining plays emerging technique in achieving high quality surface finish of machined surface due to the absence of heat affected zone. So, the present work, aims to investigate the strength properties as well as dimensionality during higher pressure abrasive water jet drilling (AWJD) of hybrid eucalyptus fiber (EF) and Coal fly ash (CFA)reinforced polycaprolactone (PCL) bio polymer composites. The AWJD parameters such as water jet pressure, standoff distance (SOD) and volume fractions of composites at three different levels for were selected for analyzing the surface finish of drilled hole in terms of surface roughness and kerf taper angle. The material strength and stiffness, its chemical compatibility through density error, voids, bonding relationship and interface adhesion were also evaluated to correlate with machinability findings. The characterization result found that the tensile strength is found between 34.57 and 53.5&#xa0;MPa for 10% EF composites and 62.33–70.32&#xa0;MPa for 30% EF composites. Voids and density error were reduced while increasing the EF and fly ash content in composites. Thermal stability fell between 0.37 and 0.58&#xa0;W/mK for all the samples which shows high stable for heat transportation. Heat deflection coefficient was reduced (1.74–3.7 (˚C × 10<sup>− 5</sup>) upon increasing the reinforcement from 10% to 30% as well as increasing the filler from 2% to 10%. Taguchi finds the most contributed AWJM factor as water pressure followed by standoff distance with an optimal level for improved surface finish at 450&#xa0;MPa and 1&#xa0;mm respectively. The developed hybrid reinforcement with PCL biopolymer showed significant improvement of material properties and machining quality.</p>

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Impact of nano filler inclusion and eucalyptus reinforcement on non-contact machinability analysis of polycaprolactone biodegradable polymer composites

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • Gaurav Bharadwaj,
  • Anupama Routray,
  • V. Sandeep,
  • V. Mohanavel,
  • S. Ramesh,
  • N. A. Abu Osman,
  • Selvakumar Kathiresan,
  • Manickam Ravichandran,
  • Manzoore Elahi M. Soudagar

摘要

The advancement in using ecofriendly light weight composites in the field of aerospace, automotive, chemical, medical and commercial applications are fulfilled because of the inherent specifications of reinforcements and matrix those used to make composites. However, the conventional drilling on these composites is still challenging one due to the higher rejection rate at the assembly point. Unconventional drilling using abrasive water jet machining plays emerging technique in achieving high quality surface finish of machined surface due to the absence of heat affected zone. So, the present work, aims to investigate the strength properties as well as dimensionality during higher pressure abrasive water jet drilling (AWJD) of hybrid eucalyptus fiber (EF) and Coal fly ash (CFA)reinforced polycaprolactone (PCL) bio polymer composites. The AWJD parameters such as water jet pressure, standoff distance (SOD) and volume fractions of composites at three different levels for were selected for analyzing the surface finish of drilled hole in terms of surface roughness and kerf taper angle. The material strength and stiffness, its chemical compatibility through density error, voids, bonding relationship and interface adhesion were also evaluated to correlate with machinability findings. The characterization result found that the tensile strength is found between 34.57 and 53.5 MPa for 10% EF composites and 62.33–70.32 MPa for 30% EF composites. Voids and density error were reduced while increasing the EF and fly ash content in composites. Thermal stability fell between 0.37 and 0.58 W/mK for all the samples which shows high stable for heat transportation. Heat deflection coefficient was reduced (1.74–3.7 (˚C × 10− 5) upon increasing the reinforcement from 10% to 30% as well as increasing the filler from 2% to 10%. Taguchi finds the most contributed AWJM factor as water pressure followed by standoff distance with an optimal level for improved surface finish at 450 MPa and 1 mm respectively. The developed hybrid reinforcement with PCL biopolymer showed significant improvement of material properties and machining quality.