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[[File:Altair X248-A2 rocket stage.jpg|thumb|350px|Casing of the [[Altair (rocket stage)|Altair rocket stage]], essentially a [[fiberglass]] composite overwrapped pressure vessel]]
[[File:Altair X248-A2 rocket stage.jpg|thumb|350px|Casing of the [[Altair (rocket stage)|Altair rocket stage]], essentially a [[fiberglass]] composite overwrapped pressure vessel]]
==Testing==
==Testing==
Various tests and inspections are performed on COPVs, including [[burst test]], [[stress-rupture lifetime]], and [[nondestructive evaluation]].<ref>[http://www.agingaircraftconference.org/all_files/3/3c/3c-ppt.pdf Vessel Testing]</ref><ref>[http://trs-new.jpl.nasa.gov/dspace/handle/2014/39869 Stress-rupture lifetime testing]</ref>
Various tests and inspections are performed on COPVs, including [[burst test]], [[stress-rupture lifetime]], and [[nondestructive evaluation]].<ref>[http://www.agingaircraftconference.org/all_files/3/3c/3c-ppt.pdf Vessel Testing] {{webarchive|url=https://web.archive.org/web/20080905122843/http://www.agingaircraftconference.org/all_files/3/3c/3c-ppt.pdf |date=2008-09-05 }}</ref><ref>[http://trs-new.jpl.nasa.gov/dspace/handle/2014/39869 Stress-rupture lifetime testing]</ref>


==See also==
==See also==
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*[[Hydrogen tank]]
*[[Hydrogen tank]]
*[[Graphite-Epoxy Motor]]
*[[Graphite-Epoxy Motor]]
*[[Autofrettage]], a process used in composite overwrapped pressure vessel manufacturing<ref>{{cite web|url=http://ston.jsc.nasa.gov/collections/trs/_techrep/SP-2011-573.pdf|author1= Pat B. McLaughlan |author2=Scott C. Forth |author3=Lorie R. Grimes-Ledesma| title=Composite Overwrapped Pressure Vessels, A Primer | publisher=[[NASA]] |date=March 2011}}</ref>
*[[Autofrettage]], a process used in composite overwrapped pressure vessel manufacturing<ref>{{cite web|url=http://ston.jsc.nasa.gov/collections/trs/_techrep/SP-2011-573.pdf|author1=Pat B. McLaughlan|author2=Scott C. Forth|author3=Lorie R. Grimes-Ledesma|title=Composite Overwrapped Pressure Vessels, A Primer|publisher=[[NASA]]|date=March 2011|deadurl=yes|archiveurl=https://web.archive.org/web/20150421081326/http://ston.jsc.nasa.gov/collections/trs/_techrep/SP-2011-573.pdf|archivedate=2015-04-21|df=}}</ref>


==References==
==References==

Revision as of 19:31, 11 August 2017

File:Composite pressure vessel.jpg

A composite overwrapped pressure vessel (COPV) is a vessel consisting of a thin, non-structural liner wrapped with a structural fiber composite, designed to hold a fluid under pressure. The liner provides a barrier between the fluid and the composite, preventing leaks (which can occur through matrix microcracks which do not cause structural failure) and chemical degradation of the structure. In general, a protective shell is applied for protective shielding against impact damage.[1][2] The most commonly used composites are fiber reinforced polymers (FRP),[3] using carbon and kevlar fibers. The primary advantage of a COPV as compared to a similar sized metallic pressure vessel is lower weight, but this may be offset by the increased costs of manufacturing and certification.

Casing of the Altair rocket stage, essentially a fiberglass composite overwrapped pressure vessel

Testing

Various tests and inspections are performed on COPVs, including burst test, stress-rupture lifetime, and nondestructive evaluation.[4][5]

See also

References

  1. ^ Protective shells for composite overwrapped pressure vessels
  2. ^ Metal-Lined Composite-Overwrapped Pressure Vessel
  3. ^ A STRUCTURAL HEALTH MONITORING SYSTEM FOR COMPOSITE PRESSURE VESSELS
  4. ^ Vessel Testing Archived 2008-09-05 at the Wayback Machine
  5. ^ Stress-rupture lifetime testing
  6. ^ Pat B. McLaughlan; Scott C. Forth; Lorie R. Grimes-Ledesma (March 2011). "Composite Overwrapped Pressure Vessels, A Primer" (PDF). NASA. Archived from the original (PDF) on 2015-04-21. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)