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NASA-LLIS-2038
Lessons Learned – To Bond or to Bolt, That is the Question [Export Version]
Year: 2008
Abstract: Abstract:
Following vibration test and bakeout of the OSTM Advanced Microwave Radiometer (AMR) Reflector Structure Assembly (RSA), it was discovered that thermal stress had caused delamination in the joint between metallic fittings and the graphite composite skin of the RSA. The joints were subsequently reinforced with bolts. Although adhesive bonding provides an elegant design solution for joining spacecraft structures and other components, alternative joining methods such as mechanical fasteners should be considered where environmental stress analysis suggests uncertainty in the safety margins. Evaluate thermal stress of bonded joints early in the design phase, and perform coupon tests that accurately represent the joint application.
Following vibration test and bakeout of the OSTM Advanced Microwave Radiometer (AMR) Reflector Structure Assembly (RSA), it was discovered that thermal stress had caused delamination in the joint between metallic fittings and the graphite composite skin of the RSA. The joints were subsequently reinforced with bolts. Although adhesive bonding provides an elegant design solution for joining spacecraft structures and other components, alternative joining methods such as mechanical fasteners should be considered where environmental stress analysis suggests uncertainty in the safety margins. Evaluate thermal stress of bonded joints early in the design phase, and perform coupon tests that accurately represent the joint application.
Subject: 1.Flight Equipment
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:29:00Z | |
| date available | 2017-09-04T17:29:00Z | |
| date copyright | 39777 | |
| date issued | 2008 | |
| identifier other | CQYCQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/152041 | |
| description abstract | Abstract: Following vibration test and bakeout of the OSTM Advanced Microwave Radiometer (AMR) Reflector Structure Assembly (RSA), it was discovered that thermal stress had caused delamination in the joint between metallic fittings and the graphite composite skin of the RSA. The joints were subsequently reinforced with bolts. Although adhesive bonding provides an elegant design solution for joining spacecraft structures and other components, alternative joining methods such as mechanical fasteners should be considered where environmental stress analysis suggests uncertainty in the safety margins. Evaluate thermal stress of bonded joints early in the design phase, and perform coupon tests that accurately represent the joint application. | |
| language | English | |
| title | NASA-LLIS-2038 | num |
| title | Lessons Learned – To Bond or to Bolt, That is the Question [Export Version] | en |
| type | standard | |
| page | 4 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;2008 | |
| contenttype | fulltext | |
| subject keywords | 1.Flight Equipment | |
| subject keywords | 1.Hardware | |
| subject keywords | 1.Parts | |
| subject keywords | Materials & Processes | |
| subject keywords | 1.Payloads | |
| subject keywords | 1.Quality | |
| subject keywords | 1.Reliability | |
| subject keywords | 1.Review systems and boards | |
| subject keywords | 1.Spacecraft | |
| subject keywords | 1.Spacecraft and Spacecraft Instruments | |
| subject keywords | 1.Test & Verification |