Tab 04 4 Statement of Work

Statement of Work- Assessment of Residual Stress in Ultrasonically Welded Single Lap Shear Coupons
The objective evaluate the effect of weld stack crystallinity on the strength of ultrasonically welded thermoplastic composites.
NASA provided materials
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T1100/LM-PAEK adherends for process development
IM7/PEKK adherends for process development

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T1100/LM-PAEK Welds.
- LM-PAEK Film (semi-crystalline and amorphous) Energy Director - T1100/LM-PAEK adherends (semi-crystalline and amorphous)

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IM7/PEKK Welds.
- PEKK Film (semi-crystalline and amorphous) Energy Director - IM7/PEKK adherends (semi-crystalline and amorphous)

•The vendor shall schedule and attend weekly review meetings (remote), review welding progress, and provide monthly reports summarizing weld process results. The vendor shall perform a process development study to ensure welding parameters are appropriate for the NASA-provided thermoplastic composite materials and energy directors. Up to 12 ultrasonic welds shall be performed for process development. Process parameters shall be recorded, such as weld energy, pressure, cycle time, and observed material behavior The vendor shall perform first 36 welds and deliver to NASA (or directly to the CHESS facility at Cornell University). Welds will be performed using materials by NASA. The vendor shall provide documentation and observations from the welding of these first 36 samples.
The vendor shall perform up to 60 additional welds for delivery to NASA with supplied materials from NASA.
• Deliver results and samples to NASA
• Provide documentation of any observations from the welding of the samples POC for this activity is Sandi Miller.
Shipping address for welded coupons is below, unless alternative address is agreed upon. NASA Glenn Research Center
21000 Brookpark Rd

Bldg 49, Rm 147
Cleveland, OH 44135