A non-contact and non-destructive method to determine process induced fiber orientation of compression molded SMC

Paper #:
  • 2018-01-1176

Published:
  • 2018-04-03
Abstract:
Understanding process induced fiber orientation distribution of composite body panels using nondestructive techniques is of prime interest. A compression molded sheet molding compound (SMC) panel is a good example of composite panels which are heavily affected by the molding process. Determination of the directionally dependent local coefficient of linear thermal expansion by digital image correlation yields information that is utilized to determine the local fiber orientation distribution function. Determination of the local fiber orientation distribution function, in turn, provides insight into the local mechanical properties of the component. In our current study, this methodology is utilized to determine the glass fiber orientation distribution function for a glass fiber SMC automotive component. The mechanical properties derived from the digital image correlation measurements and correlation to local fiber orientation are compared to the mechanical properties of the excised specimens from the molded SMC automotive component.
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