| Autor: |
Durão LMP; Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial (INEGI), 4200-465 Porto, Portugal.; Instituto Superior de Engenharia do Porto (ISEP), Instituto Politécnico do Porto (IPP), Rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal., Matos JE; Instituto Superior de Engenharia do Porto (ISEP), Instituto Politécnico do Porto (IPP), Rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal., Alves J; Instituto Superior de Engenharia do Porto (ISEP), Instituto Politécnico do Porto (IPP), Rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal., Filho SMR; Centre for Innovation and Technology in Composite Materials-CITeC, Department of Mechanical Engineering, Federal University of São João del Rei-UFSJ, São João del Rei 36301-360, MG, Brazil., Panzera TH; Centre for Innovation and Technology in Composite Materials-CITeC, Department of Mechanical Engineering, Federal University of São João del Rei-UFSJ, São João del Rei 36301-360, MG, Brazil., Scarpa F; Bristol Composites Institute (ACCIS), University of Bristol, Bristol BS8 1TR, UK. |
| Abstrakt: |
Composite materials are used in a substantial number of products. Environmental concerns highlight the need for the inclusion of recovered waste in their formulation, thus reducing their carbon footprint. These solutions raise the need to confirm the mechanical characteristics of these materials, avoiding unwanted failures. In this work, the authors present an experimental study on the drilling effects on fibrous-particulate hybrid composites made of glass/carbon fabrics and three different micro-inclusions: silica particles, recycled carbon fibre powder and cement. The mechanical features of the plates are confirmed by thrust force monitoring during drilling and by flexural testing. The range of results confirm the mechanical outcomes due to machining. The plates with monolithic carbon fabric or with carbon fabric plies in the outer plies returned higher mechanical characteristics. The plates with micro-inclusions had enhanced the flexural strength by 23% and 10%, in 40% and 60% fabric plates, respectively. The results demonstrate that the use of alternative formulations with micro-inclusions from recovered waste can contribute both to the reduction of the mechanical degradation of drilled hybrid composites and to environmental purposes by avoiding the increase in landfill waste. |
