Engineering Analysis in Imprecise Geometric Models

Authors

Riccardo GaspariniFollow

Document Type

Dissertation

Degree

Doctor of Philosophy (PhD)

Major/Program

Mechanical Engineering

First Advisor's Name

Igor Tsukanov

First Advisor's Committee Title

Committee Chair

Second Advisor's Name

Cesar Levy

Second Advisor's Committee Title

Committee Member

Third Advisor's Name

George Dulikravich

Third Advisor's Committee Title

Committee Member

Fourth Advisor's Name

Giri Narasimhan

Fourth Advisor's Committee Title

Committee Member

Fifth Advisor's Name

Victor Milinkovic

Fifth Advisor's Committee Title

Committee Member

Keywords

Applied Mechanics, Computer Aided Engineering and Design

Date of Defense

12-1-2014

Abstract

Engineering analysis in geometric models has been the main if not the only credible/reasonable tool used by engineers and scientists to resolve physical boundaries problems. New high speed computers have facilitated the accuracy and validation of the expected results. In practice, an engineering analysis is composed of two parts; the design of the model and the analysis of the geometry with the boundary conditions and constraints imposed on it.

Numerical methods are used to resolve a large number of physical boundary problems independent of the model geometry. The time expended due to the computational process are related to the imposed boundary conditions and the well conformed geometry. Any geometric model that contains gaps or open lines is considered an imperfect geometry model and major commercial solver packages are incapable of handling such inputs. Others packages apply different kinds of methods to resolve this problems like patching or zippering; but the final resolved geometry may be different from the original geometry, and the changes may be unacceptable. The study proposed in this dissertation is based on a new technique to process models with geometrical imperfection without the necessity to repair or change the original geometry. An algorithm is presented that is able to analyze the imperfect geometric model with the imposed boundary conditions using a meshfree method and a distance field approximation to the boundaries. Experiments are proposed to analyze the convergence of the algorithm in imperfect models geometries and will be compared with the same models but with perfect geometries. Plotting results will be presented for further analysis and conclusions of the algorithm convergence

Identifier

FI15050211

Recommended Citation

Gasparini, Riccardo, "Engineering Analysis in Imprecise Geometric Models" (2014). FIU Electronic Theses and Dissertations. 1793.
https://digitalcommons.fiu.edu/etd/1793