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Application of a constitutive model for micro-slip in finite element analysis
KTH, Superseded Departments, Machine Design.
KTH, Superseded Departments, Machine Design.ORCID iD: 0000-0003-2489-0688
1999 (English)In: Computer Methods in Applied Mechanics and Engineering, ISSN 0045-7825, E-ISSN 1879-2138, Vol. 170, no 1-2, 65-77 p.Article in journal (Refereed) Published
Abstract [en]

Micro-slip is a phenomenon that occurs between contacting surfaces when a frictional load, less than that necessary to produce macro-slip, is applied to the contacting surfaces. Micro-slip is an elastoplastic physical behavior that is important for fretting fatigue, control engineering, the damping and stiffness of connections and joints. A micro-slip friction lau, suitable for finite element (FE) analysis of systems of interacting bodies where micro-slip effects are of importance has been implemented in a commercial FE software. Physical arguments for a micro-slip friction law are presented. The friction law is based on asperity deformation and is capable of simulating oscillating movements. An important feature of the frictional model is that it decouples the parameters that are related to shape, material and surface topography, respectively. Two examples are chosen to illustrate the applicability of the model. Significant differences in friction force distribution between an elastic Coulomb friction law and the micro-slip friction law are detected on local level as well as on global level.

Place, publisher, year, edition, pages
1999. Vol. 170, no 1-2, 65-77 p.
Keyword [en]
URN: urn:nbn:se:kth:diva-19442ISI: 000079092700005OAI: diva2:337948
QC 20100810Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2010-08-11Bibliographically approved
In thesis
1. Simulation-driven design: Motives, Means, and Opportunities
Open this publication in new window or tab >>Simulation-driven design: Motives, Means, and Opportunities
1999 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

Efficiency and innovative problem solving are contradictory requirements for productdevelopment (PD), and both requirements must be satisfied in companies that strive to remainor to become competitive. Efficiency is strongly related to ”doing things right”, whereasinnovative problem solving and creativity is focused on ”doing the right things”.Engineering design, which is a sub-process within PD, can be viewed as problem solving or adecision-making process. New technologies in computer science and new software tools openthe way to new approaches for the solution of mechanical problems. Product datamanagement (PDM) technology and tools can enable concurrent engineering (CE) bymanaging the formal product data, the relations between the individual data objects, and theirrelation to the PD process. Many engineering activities deal with the relation betweenbehavior and shape. Modern CAD systems are highly productive tools for conceptembodiment and detailing. The finite element (FE) method is a general tool used to study thephysical behavior of objects with arbitrary shapes. Since a modern CAD technology enablesdesign modification and change, it can support the innovative dimension of engineering aswell as the verification of physical properties and behavior. Concepts and detailed solutionshave traditionally been evaluated and verified with physical testing. Numerical modeling andsimulation is in many cases a far more time efficient method than testing to verify theproperties of an artifact. Numerical modeling can also support the innovative dimension ofproblem solving by enabling parameter studies and observations of real and syntheticbehavior. Simulation-driven design is defined as a design process where decisions related tothe behavior and performance of the artifact are significantly supported by computer-basedproduct modeling and simulation.A framework for product modeling, that is based on a modern CAD system with fullyintegrated FE modeling and simulation functionality provides the engineer with tools capableof supporting a number of engineering steps in all life-cycle phases of a product. Such aconceptual framework, that is based on a moderately coupled approach to integratecommercial PDM, CAD, and FE software, is presented. An object model and a supportingmodular modeling methodology are also presented. Two industrial cases are used to illustratethe possibilities and some of the opportunities given by simulation-driven design with thepresented methodology and framework.

Place, publisher, year, edition, pages
Stockholm: KTH, 1999. vi, 42 p.
Trita-MMK, ISSN 1400-1179 ; 1999:26
CAD, CAE, FE method, Metamodel, Object model, PDM, Physical behavior, System
urn:nbn:se:kth:diva-2875 (URN)99-3055738-5 (ISBN)
Public defence
1999-12-01, 00:00
QC 20100810Available from: 2000-01-01 Created: 2000-01-01 Last updated: 2010-08-11Bibliographically approved

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