SATPC0033933 Tab 04 4 SOW.pdf
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- Solicitation number
- 80NSSC24858574Q
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This document contains a statement of work and related federal contract opportunity notice. The statement of work is for molecular dynamics modeling of thermoplastic composites for NASA Langley Research Center cryogenic fuel tank applications. The research will determine thermal contraction, crystallinity, mechanical properties, and gas permeability of candidate thermoplastics and a reference epoxy at temperatures including liquid oxygen and hydrogen using simulation tools. The period of performance is January 1, 2024 to December 31, 2024. Deliverables include candidate lists, simulation predictions, reports, presentations, and a technical paper.
The related federal contract opportunity is a special notice that NASA/NSSC intends to issue a sole source contract to Michigan Technological University for this molecular modeling effort. The notice seeks capability statements from other sources by January 16, 2024 solely to determine whether to conduct a competitive procurement. The primary point of contact is a NASA procurement specialist and performance will be at NASA Langley Research Center.
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Molecular Modeling of Shrinkage, Strength, and Permeability in Thermoplastic Composites
Statement of work
This project is focused on the molecular dynamics (MD) modeling of thermoplastics for enabling the down-selection of polymers for use at NASA Langley Research Center for cryogenic fuel tank applications. During the fabrication of carbon fiber (CF) reinforced polymer composite materials, the large thermal expansion mismatch between CF and polymer resin from thermal contraction of the resin is a major concern for induced residual stresses and the corresponding damage. Although some data exists on the thermal contraction of polymers after consolidation processing, most of the data relates to temperature ranges (close to room temperature) that are not relevant to cryogenic fuel tanks. Furthermore, the mechanical performance and permeability characteristics of thermoplastics at these temperatures are generally not known. The goal of this research is to use
MD simulation to determine the thermal contraction, crystallinity, mechanical properties, and gas permeability of a wide range of thermoplastics at three temperatures: Liquid oxygen (-183°C), liquid hydrogen (-253°C), and liquid methane (-162°C). Commercial epoxy resin system (Cycom
5320-1) will be used as a baseline material to compare with the candidate thermoplastic resins.
The Michigan Tech team will use their unique simulation protocols they have developed over the last ~20 years to accomplish the research goal. They have developed a unique set of analysis tools for efficiently and accurately simulating amorphous polymer materials using the LAMMPS
(Large-scale Atomic/Molecular Massively Parallel Simulator) software package. These tools will be used to quickly simulate a wide range of materials for NASA’s cryogenic fuel tank application requirements.
• Period of Performance: January 1, 2024 to December 31, 2024
• Deliverables
(1) List of candidate thermoplastic polymers and CF reinforced composites with material specifications for cryotank applications (due March 15, 2024)
(2) MD simulation predictions of thermal contraction, crystallinity, mechanical properties, and gas permeability of candidate thermoplastic polymers and the reference epoxy polymer (Cycom 5320-1) at three cryogenic temperatures (-253°C, -183°C, -162°C) and room temperature (23°C) (due October 15, 2024)
(3) Mid-term report (due March 15, 2024): presentation, preliminary result of MD simulation
(4) Final presentation report (due October 15, 2024): presentation
(5) Final paper report (due December 31, 2024): technical paper
(6) All deliverables will be delivered with unlimited rights
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