edu.ucar.opensky::technotes:33 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T17:52:22.838506 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7bp026n Balloon Film Performance After Prior Stress 1970-01-01T00:00:00Z publication https://n2t.org/ark:/85065/d7bp026n https://doi.org/10.5065/D6P55KFM Hauser Research and Engineering Company author National Center for Atmospheric Research author Scientific Balloon Facility (SBF) author UCAR/NCAR - Library publisher This report describes a series of tests conducted on balloon film material to determine if uneven loading of the balloon film material might cause failure at a stress level lower than the originally designated ultimate strength of the material. Specimens of polyethylene balloon film from two different manufacturers were tested to learn the effects of prior loading on the ultimate strength of the material. Different film thicknesses were tested uniaxially at the temperature environments most representative of balloon flight conditions, +25 and -80��C, and biaxially at +25��C. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Platform characteristics theme U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2021-09-17 revision 11.2 NASA Global Change Master Directory originator Valids List: Science and Services Keywords Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation