Cutting mechanics of soft solids
department or school: Applied Science, Faculty of
department or school: Mechanical Engineering, Department of
data provider: DSpace
degree campus: UBCV
creator: Antarvedi Goda, Bharath
issued: 2024-08-12T17:25:44Z
issued: 2024
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: Cutting mechanics of soft solids has been of growing interest due to its promising benefits in material characterization and other industrial applications. However, a full understanding of the physical phenomena is still missing, and several questions remain outstanding. In this thesis, we explore the simple problem of wire cutting. Through finite element analysis and dimensional arguments, we obtain a simple scaling relation between the wire radius and the steady-state cutting forces. We note that, in the absence of dissipative mechanisms, steady-state cutting forces are independent of blade sharpness. However, in the presence of dissipation in the form of friction and adhesion, we show that tough materials are sensitive to friction, whereas, brittle materials are sensitive to dissipation in the form of adhesion and wear. In the regime dominated by friction, cutting forces have a weaker sensitivity to blade sharpness. But, in the regime dominated by adhesion and shear damage/ wear, we have a linear dependence between cutting force and blade sharpness. By accounting for strain-stiffening and compressibility of the soft material, we note that tough and highly strain-stiffening materials are most sensitive to frictional dissipation. Whereas, in-compressible brittle materials are most sensitive to adhesion and wear dissipation. Finally, this thesis provides important findings: Toughness can be estimated from wire-cutting experiments from the intercept of the forcewire radius linear correlation, however this only estimates cleavage toughness. In the adhesive/wear regime, a larger radius would scale the cutting fracture process zone giving rise to higher apparent toughness.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/88920
note: Cutting Mechanics of Soft SolidsbyBharath Antarvedi GodaM.S. in Mechanical Engineering, University of Colorado Boulder, 2019B.E. in Mechanical Engineering, Anna University, 2017A THESIS SUBMITTED IN PARTIAL FULFILLMENTOF THE REQUIREMENTS FOR THE DEGREE OFDoctor of PhilosophyinTHE FACULTY OF GRADUATE AND POSTDOCTORALSTUDIES(Mechanical Engineering)The University of British Columbia(Vancouver)August 2024© Bharath Antarvedi Goda, 2024The following individuals certify that they have read, and recommend to the Fac-ulty of Graduate and Postdoctoral Studies for acceptance, the thesis entitled:Cutting Mechanics of Soft Solidssubmitted by Bharath Antarvedi Goda in partial fulfillment of the requirementsfor the degree of Doctor of Philosophy in Mechanical Engineering.Examining Committee:Mattia Bacca, Associate Professor, Mechanical Engineering, UBCSupervisorXiaoliang Jin, Associate Professor, Mechanical Engineering, UBCSupervisory Committee MemberReza Vaziri, Professor, Civil Engineering, UBCUniversity ExaminerSavvas G. Hatzikiriakos, Professor, Chemical and Biological Engineering, UBCUniversity ExaminerAnand Jagota, Professor, Chemical and Biomolecular Engineering, Lehigh Uni-versityExternal ExaminerAdditional Supervisory Committee Members:Jasmin Jelovica, Associate Professor, Mechanical Engineering, UBCSupervisory Committee MemberSrikantha Anasavarapu, Professor, Mechanical Engineering, UBCSupervisory Committee MemberiiAbstractCutting mechanics of soft solids has been of growing interest due to its promisingbenefits in material characterization and other industrial applications. However, afull understanding of the physical phenomena is still missing, and several ques-tions remain outstanding. In this thesis, we explore the simple problem of wirecutting. Through finite element analysis and dimensional arguments, we obtain asimple scaling relation between the wire radius and the steady-state cutting forces.We note that, in the absence of dissipative mechanisms, steady-state cu…
has type: Thesis/Dissertation
date issued: 2024-11
is shown at: 10.14288/1.0445048
language: eng
degree discipline: Mechanical Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Bacca, Mattia
type: Text
identifier URI: http://hdl.handle.net/2429/88920