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TB 26-02 Effects of Large Grain Size in Composite Overwrapped Pressure Vessel

Summary by NASA (Source)
The NASA Engineering and Safety Center (NESC) performed an assessment to characterize the effects of abnormal grain growth (AGG) within a metallic liner of a composite overwrapped pressure vessel (COPV). This effort focused on evaluating the mechanical response of the liner material, including the strain amplification factor (SAF), using a series of custom-designed coupons that incorporated both metal and composite overwrap. The study demonstrat…

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NASA (Source) broke the news in Washington, United States on Wednesday, February 18, 2026.
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