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ASTM F942-2002(2008) 航天透明外壳用的夹层材料试验方法选择的标准指南

ASTM F942-2002(2008) 航天透明外壳用的夹层材料试验方法选择的标准指南

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【英文标准名称】: Standard Guide for Selection of Test Methods for Interlayer Materials for Aerospace Transparent Enclosures
【原文标准名称】: 航天透明外壳用的夹层材料试验方法选择的标准指南
【标准号】: ASTM F942-2002(2008)
【标准状态】: 现行
【国别】: 美国
【发布日期】: 2002
【实施或试行日期】:
【发布单位】: 美国材料与试验协会(US-ASTM)
【起草单位】: F07.08
【标准类型】: (Guide)
【标准水平】: ()
【中文主题词】:
【英文主题词】: aerospace; interlayer materials; laminates; transparent enclosures; Aerospace transparent enclosures; Glass aerospace materials/applications; Interlayer materials; Laminates (aerospace); Structural sandwich constructions
【摘要】: This guide is intended for use by material suppliers, aircraft transparent enclosure fabricators, airframe manufacturers, government agencies, and others that may become involved in the testing of transparent interlayer materials. These test methods provide data on both individual interlayer materials and material combinations commonly used in the fabrication of aerospace transparent enclosures and provide a means of evaluating the performance of one interlayer material against another. Primary characteristics and their long-term stability are critical to the performance of an interlayer material. Basic tests define the as-manufactured material characteristics of the interlayer material. Ageing procedures provide for representative exposure to environments that may induce changes in material characteristics. Tests performed before and after ageing exposure provide a means of estimating the potential useable life-span of an interlayer material or to compare the durability of one interlayer material with another. When employing these test methods for the comparison of interlayer materials after exposure to selected environmental conditions, the user shall be aware that many factors influencing degradation due to weathering vary from one location and exposure period to another location and exposure period. For direct weathering comparisons, the interlayer materials to be compared shall be subjected to the exposure and have the tests performed at the same time. It is emphasized that the test values obtained under these simultaneously applied conditions are for comparative use and their use as design characteristics shall be made with caution. The test methods listed include those considered critical to the performance of aircraft transparent enclosures. The user is advised to use the latest revision of any test method.1.1 This guide summarizes the standard test methods available for determining physical and mechanical characteristics of interlayer materials used in multi-ply aerospace transparent enclosures. 1.2 Interlayer materials are used to laminate glass-to-glass, glass-to-plastic, and plastic-to-plastic. Interlayer materials are basically transparent adhesives with high-quality optical properties. They can also serve as an energy absorbing medium, a fail-safe membrane to contain cockpit pressure and to prevent entry of impact debris; a strain insulator to accommodate different thermal expansion rates of members being laminated and as an adherent to prevent spalling of inner surface ply material fragments. The relative importance of an interlayer characteristic will be a function of the prime use it serves in its particular application. 1.3 This guide, as a summary of various methods in Section 2, is intended to facilitate the selection of tests that can be applied to interlayer materials. 1.4 The test methods listed are for use in determining basic design characteristics and in assuring lot-to-lot uniformity of the materials being tested except as noted in 3.3. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and heal practices and determine the applicability of regulatory limitations prior to use.
【中国标准分类号】: V10
【国际标准分类号】: 49_025_50
【页数】: 2P.;A4
【正文语种】: 英语

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