Probabilistic modelling of tool unbalance during cutting of hard-heterogeneous materials: a case study in Ceramic Matrix Composites (CMCs)
Compared to other materials, CMCs display a unique high hardness and heterogeneous nature which are critically reflected during the drilling process where asymmetrical high forces are suffered by the tool, resulting in an unbalance of the drill bit. Hence, this study proposes a mechanistic approach...
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Elsevier
2018
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| Online Access: | https://eprints.nottingham.ac.uk/51648/ |
| _version_ | 1848798541398409216 |
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| author | Diaz, O. Gavalda Axinte, D.A. Novovic, D. |
| author_facet | Diaz, O. Gavalda Axinte, D.A. Novovic, D. |
| author_sort | Diaz, O. Gavalda |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Compared to other materials, CMCs display a unique high hardness and heterogeneous nature which are critically reflected during the drilling process where asymmetrical high forces are suffered by the tool, resulting in an unbalance of the drill bit. Hence, this study proposes a mechanistic approach where the hard nature resulting in high radial forces is analytically studied and coupled with a probabilistic model where the heterogeneous nature of CMCs is taken into consideration. This theoretical study results in an in-depth understanding of the loading unbalance occurring on different tool sizes during drilling of CMCs which can lead to a premature tool breakage. The nature of this unique force that is assumed in the theoretical approach to influence the cutting of hard-heterogeneous materials is experimentally validated by drilling a homogeneous and a heterogeneous hard ceramics, i.e. a monolithic SiC and a SiC/SiC CMC. Moreover, the model developed together the with drilling experiments with different tool diameters result in an understanding of why small tool diameters suffer a premature tool breakage when drilling difficult-to-machine CMCs. |
| first_indexed | 2025-11-14T20:21:25Z |
| format | Article |
| id | nottingham-51648 |
| institution | University of Nottingham Malaysia Campus |
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| publishDate | 2018 |
| publisher | Elsevier |
| recordtype | eprints |
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| spelling | nottingham-516482020-05-04T19:48:39Z https://eprints.nottingham.ac.uk/51648/ Probabilistic modelling of tool unbalance during cutting of hard-heterogeneous materials: a case study in Ceramic Matrix Composites (CMCs) Diaz, O. Gavalda Axinte, D.A. Novovic, D. Compared to other materials, CMCs display a unique high hardness and heterogeneous nature which are critically reflected during the drilling process where asymmetrical high forces are suffered by the tool, resulting in an unbalance of the drill bit. Hence, this study proposes a mechanistic approach where the hard nature resulting in high radial forces is analytically studied and coupled with a probabilistic model where the heterogeneous nature of CMCs is taken into consideration. This theoretical study results in an in-depth understanding of the loading unbalance occurring on different tool sizes during drilling of CMCs which can lead to a premature tool breakage. The nature of this unique force that is assumed in the theoretical approach to influence the cutting of hard-heterogeneous materials is experimentally validated by drilling a homogeneous and a heterogeneous hard ceramics, i.e. a monolithic SiC and a SiC/SiC CMC. Moreover, the model developed together the with drilling experiments with different tool diameters result in an understanding of why small tool diameters suffer a premature tool breakage when drilling difficult-to-machine CMCs. Elsevier 2018-09-01 Article PeerReviewed Diaz, O. Gavalda, Axinte, D.A. and Novovic, D. (2018) Probabilistic modelling of tool unbalance during cutting of hard-heterogeneous materials: a case study in Ceramic Matrix Composites (CMCs). Composites Part B: Engineering, 148 . pp. 217-226. ISSN 1359-8368 Machining; Ceramic Matrix Composites; Instabilities; Heterogeneous materials; Hard materials https://www.sciencedirect.com/science/article/pii/S1359836818302105 doi:10.1016/j.compositesb.2018.04.029 doi:10.1016/j.compositesb.2018.04.029 |
| spellingShingle | Machining; Ceramic Matrix Composites; Instabilities; Heterogeneous materials; Hard materials Diaz, O. Gavalda Axinte, D.A. Novovic, D. Probabilistic modelling of tool unbalance during cutting of hard-heterogeneous materials: a case study in Ceramic Matrix Composites (CMCs) |
| title | Probabilistic modelling of tool unbalance during cutting of hard-heterogeneous materials: a case study in Ceramic Matrix Composites (CMCs) |
| title_full | Probabilistic modelling of tool unbalance during cutting of hard-heterogeneous materials: a case study in Ceramic Matrix Composites (CMCs) |
| title_fullStr | Probabilistic modelling of tool unbalance during cutting of hard-heterogeneous materials: a case study in Ceramic Matrix Composites (CMCs) |
| title_full_unstemmed | Probabilistic modelling of tool unbalance during cutting of hard-heterogeneous materials: a case study in Ceramic Matrix Composites (CMCs) |
| title_short | Probabilistic modelling of tool unbalance during cutting of hard-heterogeneous materials: a case study in Ceramic Matrix Composites (CMCs) |
| title_sort | probabilistic modelling of tool unbalance during cutting of hard-heterogeneous materials: a case study in ceramic matrix composites (cmcs) |
| topic | Machining; Ceramic Matrix Composites; Instabilities; Heterogeneous materials; Hard materials |
| url | https://eprints.nottingham.ac.uk/51648/ https://eprints.nottingham.ac.uk/51648/ https://eprints.nottingham.ac.uk/51648/ |