This dissertation presents a systematic study on the dimension variation prediction and control for polymer matrix fiber reinforced composites. A dimension variation model was developed for process simulation based on thermal stress analysis and finite element analysis (FEA). This model was validated against the experimental data, the analytical solutions and the data from literature. Using the FEA-based dimension variation model, the deformations of typical composite structures were studied and the regression-based dimension variation model was developed. The regression-based dimension variation model can significantly reduce computation time and provide a quick design guide for composite products with reduced dimension variations. By introducing the material modification coefficient, this comprehensive model can handle various fiber/resin types and stacking sequences. It eliminates the complicated, time-consuming finite element meshing and material parameter defining process. The deformation compensation through tooling design was investigated using the FEA-based and the regression-based dimension variation models. The structural tree method (STM) was developed to compute the assembly deformation from the deformations of individual components, as well as the deformation of general shape composite components. The STM enables rapid dimension variation analysis/synthesis for complex composite assemblies with the regression-based dimension variation model. Using the STM and the regression-based dimension variation model, design optimization and tolerance analysis/synthesis were conducted. The exploring work presented in this research provides a foundation to develop practical and proactive dimension control techniques for composite products. / A Dissertation submitted to the Department of Industrial Engineering in partial
fulfillment of the requirements for the degree of Doctor of Philosophy. / Degree Awarded: Summer Semester, 2003. / Date of Defense: July 7, 2003. / Composites / Includes bibliographical references. / Chuck Zhang, Professor Directing Dissertation; George Buzyna, Outside Committee Member; Zhiyong Liang, Committee Member; Okenwa Okoli, Committee Member; Ben Wang, Committee Member.
|Dong, Chensong (authoraut), Zhang, Chuck (professor directing dissertation), Buzyna, George (outside committee member), Liang, Zhiyong (committee member), Okoli, Okenwa (committee member), Wang, Ben (committee member), Department of Industrial and Manufacturing Engineering (degree granting department), Florida State University (degree granting institution)
|Florida State University
|Florida State University
|1 online resource, computer, application/pdf
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