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In-Situ Investigation of Resin Shrinkage in the Composite Manufacturing Environment

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Abstract

Cure shrinkage of the polymer matrix during the composite manufacturing process leads to residual stresses, which can adversely affect the structural integrity and dimensional stability of composite structures. In this paper, a novel approach is developed for measuring the resin shrinkage and strain evolution of an epoxy resin (EPON-862) in the composite manufacturing environment. The resin is cured in a custom designed autoclave with borosilicate viewports, while digital image correlation (DIC) is used to analyze the strain evolution throughout the cure cycle. These processing induced strains are correlated to the cure-state using differential scanning calorimetery (DSC). The different mechanisms involved in the polymer strain evolution during composite processing are discussed.

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Data Availability

The data will be made available on request.

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Acknowledgement

This work was funded by NSF AM contract number 2001038. We thank Dr Sandra Boetcher for access to DSC and Dr Marwan Alhaik for useful discussions.

Funding

This work was funded by NSF AM contract number 2001038.

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Authors and Affiliations

  1. Aerospace Engineering Department, Embry-Riddle Aeronautical University, Daytona Beach, FL, 32114, USA

    Samarth Motagi & Sirish Namilae

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  1. Samarth Motagi
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  2. Sirish Namilae
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Correspondence to Sirish Namilae.

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Motagi, S., Namilae, S. In-Situ Investigation of Resin Shrinkage in the Composite Manufacturing Environment. Appl Compos Mater 28, 651–657 (2021). https://doi.org/10.1007/s10443-021-09887-x

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