Additive Manufacturing of Damage Tolerant Continuous Glass Fiber Reinforced Thermosets

Mohanad Idrees, Giuseppe R. Palmese, Nicolas J. Alvarez

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Additive manufacturing (AM) offers significant advantages in the way of economics and material/shape flexibility. However, one primary drawback of AM technology is the difficulty in manufacturing fiber reinforced parts. We have recently developed an AM process for continuous glass fiber reinforced composites using a liquid crystal display (LCD) printer. The process allows for the inclusion of resin-rich layers (RRL) between plies to toughen the regions vulnerable to premature failure. This work aims to understand the effect of RRL properties and thickness on the interlaminar toughness of AM glass fiber laminates (i.e., Gic and Giic). We used a combination of microscopy and spectroscopy to investigate the failure process. Our results revealed that the resin used in the RRL significantly affected material properties. For example, we show that a brittle resin (DA2) in the RRL significantly compromised the interlaminar toughness due to microcracking. However, the use of a tough RRL (Tenacious) significantly increased Giic by ~90% and linearly improved the initiation Gic. The fractured surfaces were studied in detail, and the data suggests that the RRL laminate interface is critical for translating resin properties to the composite, thus improving laminate interlaminar toughness.

Original languageEnglish (US)
Title of host publicationSAMPE 2022 Conference and Exhibition
PublisherSoc. for the Advancement of Material and Process Engineering
ISBN (Electronic)9781934551417
StatePublished - 2022
Externally publishedYes
EventSAMPE 2022 Conference and Exhibition - Charlotte, United States
Duration: May 23 2022May 26 2022

Publication series

NameInternational SAMPE Technical Conference


ConferenceSAMPE 2022 Conference and Exhibition
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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