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ABSTRACT
Recent advancement in medical engineering demands a prefect solution for various problems. In this work, we proposed compliant forceps with the novel serpentine flexure. Compliant mechanisms are flexible mechanisms which are jointless in nature, which transfer force and displacement from input link to output link through an elastic body deformation. The compliant mechanism provides an optimum solution for many micro applications, which is suitable for solving many problems in medical engineering. Forceps require a limited level of parallel movement to hold the required amount of tissues. In traditional forceps, ‘U’ shaped flexure restricts the parallel motion. Hence, this work the proposed Forceps uses serpentine flexure to overcome the parallel motion problems. Here, a parallel Serpentine flexure-based forceps is developed. The mathematical modelling for serpentine flexures is developed. A generic equation is been developed to estimate the stiffness of the serpentine flexure model, stiffness is estimated for two different types of flexure model. The finite element model (FEM) of serpentine flexures is developed using ANSYS and stiffness is validated. Mathematical and FEM results are promising with minimum variations. Finally, forceps are developed using leverage mechanism concepts with the serpentine flexure hinges and FEM is performed. FEM results of forceps are promising.
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No potential conflict of interest was reported by the authors.
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Notes on contributors
Libu George B
Libu George B completed his graduated in mechanical engineering (BE) and Masters in Mechanical Engineering Technology (M.Tech) from Manipal Institute of Technology (Manipal University). He is pursuing his PhD in mechanical engineering from VIT University, India. He is having 11+ years of industrial and research experience. Presently, he is working as Senior mechanical engineer in Baxter India Pvt Ltd, Bangalore. His research interests are Finite Element Analysis, Mechanism Design, compliant mechanism design, Medical equipment Design, verification, Medical equipment Validation Biopsy devices and MEMS.
R. Bharanidaran
R. Bharanidaran, an associate professor of school mechanical engineering at Vellore Institute of Technology Vellore, graduated in mechanical engineering (B.E.) masters in computer aided design (M.E.) from Anna University, India. In 2014, he obtained his PhD from National Institute of Technology Tiruchirappalli, India for designing compliant microgripper with multi functions. His research interests are compliant mechanism design, Biopsy devices, prosthetics, Flexure hinges, Finite Element Analysis and MEMS. He has published numerous articles in refereed journals and conference proceedings including Elsevier, Springer and in various reputed publishers.