ASTM C481-1999(2005) Standard Test Method for Laboratory Aging of Sandwich Constructions《夹层结构的实验室老化标准试验方法》.pdf
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1、Designation: C 481 99 (Reapproved 2005)Standard Test Method forLaboratory Aging of Sandwich Constructions1This standard is issued under the fixed designation C 481; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last r
2、evision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method covers the determination
3、of the resis-tance of sandwich panels to severe exposure conditions asmeasured by the change in selected properties of the materialafter exposure. The exposure cycle to which the specimen issubjected is an arbitrary test having no correlation with naturalweathering conditions.1.2 The values stated i
4、n SI units are to be regarded as thestandard. The inch-pound units given may be approximate.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health pract
5、ices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 273 Test Method for Shear Properties in Sandwich CoreMaterialsC 297/C 297M Test Method for Flatwise Tensile Strengthof Sandwich ConstructionsC 363 Test Method for Delamination St
6、rength of Honey-comb Core MaterialsC 364 Test Method for Edgewise Compressive Strength ofSandwich ConstructionsC 365 Test Methods for Flatwise Compressive Properties ofSandwich CoresC 393 Test Method of Flexural Properties of SandwichConstructionsD 1781 Test Method for Climbing Drum Peel forAdhesive
7、s3. Significance and Use3.1 Most sandwich panels are subjected to various tempera-ture and humidity environments. This laboratory aging testdetermines the selected panel property degradation undersimulated conditions.3.2 These test methods provide a standard method ofobtaining simulated environmenta
8、l degradation data for qualitycontrol, acceptance specification testing, and research anddevelopment; however, these laboratory aging test proceduresdo not have any correlation with natural weathering conditions.4. Apparatus4.1 Water tank, steam sprayer, oven, and freezer, all capableof maintaining
9、the required environment.4.2 Test apparatus, shall conform to the appropriate ASTMTest Method listed in Section 2.5. Test Specimens5.1 The test specimens shall conform to the appropriateASTM Test Method listed in Section 2.6. Aging Test Procedures6.1 Subject each specimen to six complete cycles of l
10、abo-ratory aging, using either Cycle A (more severe) or Cycle B(milder). The time interval between cycles shall not exceed 30min.6.2 Cycle A:6.2.1 Totally immerse the specimen horizontally in water at50 6 2C (120 6 3F) for 1 h.6.2.2 Spray with steam and water vapor at 95 6 3C (200 65F) for 3 h.6.2.3
11、 Store at 12 6 3C (10 6 5F) for 20 h.6.2.4 Heat at 100 6 2C (210 6 3F) in dry air for 3 h.6.2.5 Spray again with steam and water vapor at 95 6 3C(200 6 5F) for 3 h.6.2.6 Heat in dry air at 100 6 2C (210 6 3F) for 18 h.6.3 Cycle B:6.3.1 Totally immerse the specimen horizontally in water at50 6 3C (12
12、0 6 5F) for 1 h.6.3.2 Heat in dry air at 70 6 3C (160 6 5F) for 3 h.1This specification is under the jurisdiction of ASTM Committee D30 onComposite Materials and is the direct responsibility of Subcommittee D30.09 onSandwich Construction.Current edition approved Mar. 1, 2005. Published March 2005. O
13、riginallyapproved in 1961. Last previous edition approved in 1999 as C 481 99.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page on
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