Examination of Braided Composite Geometric Factors Using Three Dimensional Digital Image Correlation Measurement Techniques

• Author / Creator

  Leung, Cheequn

• The objective of this thesis is to develop and validate an optical measurement tool for composite braided structures and use this tool to examine important variables, braid radius and angle, under tensile loading and to perform initial studies.
  Current deformation measurement techniques used on composite braids were reviewed. Techniques were compared to one another in terms of their ability to address difficulties specific to braided composites.
  A digital image correlation based optical measurement system was used. Three tests were performed to determine the accuracy of the system. These include a rigid body motion test, a strain test, and a surface reconstruction test. Main sources of error of the optical measurement system are evaluated and discussed.
  The braid radius and angle of tubular braided composites under tensile loading was assessed. The effects of braid radius and angle change on calculation of stress and elastic moduli are highlighted.

• Subjects / Keywords

  • Braided
  • Composite
  • Digital image correlation

• Graduation date

  Fall 2012

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R31K69

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.