TY - GEN
T1 - Additive Manufacturing of Damage Tolerant Continuous Glass Fiber Reinforced Thermosets
AU - Idrees, Mohanad
AU - Palmese, Giuseppe R.
AU - Alvarez, Nicolas J.
N1 - Funding Information:
sponsored by the Army Research
Funding Information:
This research was sponsored by the Army Research Laboratory and was accomplished under Cooperative Agreement Number W911NF-14-2-0227. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes not withstanding any copyright notation herein.
Publisher Copyright:
Copyright 2022. Used by the Society of the Advancement of Material and Process Engineering with permission.
PY - 2022
Y1 - 2022
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:85136268807
T3 - International SAMPE Technical Conference
BT - SAMPE 2022 Conference and Exhibition
PB - Soc. for the Advancement of Material and Process Engineering
T2 - SAMPE 2022 Conference and Exhibition
Y2 - 23 May 2022 through 26 May 2022
ER -