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DIGITAL LIBRARY: SAMPE 2023 | SEATTLE, WA | APRIL 17-20

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CHARACTERIZATION APPROACH FOR COMPRESSION MOLDED DISCONTINUOUS FIBER THERMOPLASTIC COMPOSITES

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Title: CHARACTERIZATION APPROACH FOR COMPRESSION MOLDED DISCONTINUOUS FIBER THERMOPLASTIC COMPOSITES

Authors: John S. Tomblin, Rachael M. Andrulonis, Royal S. Lovingfoss, Brandon L. Saathoff, Cindy Ashforth, Curtis Davies

DOI: 10.33599/nasampe/s.23.0244

Abstract: Thermoplastic composites show potential in increasing the manufacturing production rate of composite aerospace structures. This is largely due to their ability to be consolidated quickly using automated processes. A variety of reinforced thermoplastic material forms are offered that can be processed multiple ways in order to meet structural performance requirements at the necessary production volumes without substantial compromise. Intrinsically, this requires generating a significant amount of statistically-based material property data for each unique material and process combination. Currently, the National Institute for Aviation Research (NIAR) and the Federal Aviation Administration (FAA) are developing a material qualification framework for compression molded discontinuous fiber thermoplastic composites in consensus with industry experts. To aid in the development of the qualification framework, a screening test matrix was formed to identify the key processing parameters and evaluate the appropriate test methods and specimen sizes. Three main variables were considered in the trial testing: reinforcement size, material flow behavior and panel thickness. The effect of these key processing parameters on the mechanical properties are discussed along with guidelines for testing and characterization.

References: 1. Howell, D. and Fukumoto, S. “Compression Molding of Long Chopped Fiber Thermoplastic Composites” Tencate Advanced Composites Technical Paper. 2. Favaloro, A. and Sommer, D., “On the use of orientation tensors to represent prepreg platelet orientation state and variability,” Purdue University, March 9, 2020. 3. ASTM D792-20, “Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement,” ASTM International, DOI: 10.1520/D0792-20. 4. ASTM D3171-22, “Standard Test Methods for Constituent Content of Composite Materials,” ASTM International, DOI: 10.1520/D3171-22. 5. ASTM D2734-16, “Standard Test Methods for Void Content of Reinforced Plastics,” ASTM International, DOI: 10.1520/D2734-16. 6. ASTM D3039/D3039M-08, “Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials,” ASTM International, DOI: 10.1520/D3039_D3039-08. 7. ASTM D5766/D5766M-11, “Standard Test Method for Open-Hole Tensile Strength of Polymer Matrix Composite Laminates,” ASTM International, DOI: 10.1520/ D5766M-11R18. 8. Solvay APC (PEKK-FC), “Technical Data Sheet,” V5, November 11, 2017. 9. Salviato, M., “Certification of Discontinuous Composite Material Forms for Aircraft Structures,” JAMS Technical Review, September 29, 2021.

Conference: SAMPE 2023

Publication Date: 2023/04/17

SKU: TP23-0000000244

Pages: 15

Price: $30.00

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