期刊
TRIBOLOGY INTERNATIONAL
卷 63, 期 -, 页码 226-234出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2012.08.021
关键词
Gelatin tissue phantom; Frictional energy; Strain energy release rate; Needle insertion
资金
- EPSRC [EP/E040918/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E040918/1] Funding Source: researchfish
An improved understanding of the detailed tool-tissue interactions in soft tissue phantoms is necessary to optimise the design and actuation of novel surgical devices. Incorporating rate dependency of these interactions provides general, rather than specific, working conditions. Blade insertion experiments and accompanying finite element simulations examine contact interactions, strain energy release rate and deformation in a gelatin phantom with a modulus of approximately 10 kPa. Insertion rates of 0.25-2 mm/s show frictional response and strain energy release rate more than doubling. This demonstrates the importance of testing phantoms over the full range of operating conditions. The role of the coefficient of friction between the tool and the tissue and the related frictional energy expenditure are also studied and discussed. (C) 2012 Elsevier Ltd. All rights reserved.
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