1、Designation: F 790 08Standard Guide forTesting Materials for Aerospace Plastic TransparentEnclosures1This standard is issued under the fixed designation F 790; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisi
2、on. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide is intended to summarize the standard testmethods available on individual and composite materialsutilized in fabricat
3、ion of aerospace plastic transparent enclo-sures. As such, it is intended to specifically include transparentthermoplastics, transparent elastomers, and reinforced plastics,whether thermoplastic or thermosetting.1.2 This guide is intended as an aid in the search for testmethods pertinent to Aerospac
4、e Plastic Transparent Enclo-sures. It should be understood that all methods listed may notapply to all enclosures.1.3 The standards included refer to the properties or aspectslisted in Table 1. The properties or aspects are listed inalphabetical order and the descriptions used are intended tofacilit
5、ate the search.1.4 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 practices and determine the applica-bility of regulatory limitations prior to use.
6、2. Referenced Documents2.1 ASTM Standards:2C117 Test Method for Materials Finer than 75-m (No.200) Sieve in Mineral Aggregates by WashingD 149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD 150 Test Methods
7、 for AC Loss Characteristics and Per-mittivity (Dielectric Constant) of Solid Electrical Insula-tionD 256 Test Methods for Determining the Izod PendulumImpact Resistance of Plastics1This guide is under the jurisdiction ofASTM Committee F07 onAerospace andAircraft and is the direct responsibility of
8、F07.08 on Transparent Enclosures andMaterials.Current edition approved April 1, 2008. Published April 2008. Originallyapproved in 1988. Last previous edition approved in 2002 as F 790 02.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servicea
9、stm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Property or Aspects of Aerospace Plastic TransparentEnclosuresProperty or Aspect Test MethodAbrasion Resistance D 1044Abrasion ResistanceOscillating Sand F 735Abrasio
10、n TestingSizing Sand for C117Bearing Strength D 953Bird Impact Resistance F 330Bond Integrity F 521Brittleness TemperatureBy Impact D 746Chemical Resistance D 543Coefficient of Linear Thermal Expansion D 696Compressive Properties D 695Electrical Insulating MaterialDC Resistance or Conductance D 257E
11、lectrical Insulating MaterialDielectric Breakdown Voltage D 149Electrical Insulating MaterialDielectric Constant D 150Electrical Insulating MaterialFlexural Properties D 790Electrical Insulating MaterialImpact Resistance D 256Electrical Insulating MaterialRockwell Hardness D 785Environmental Resista
12、nce F 520Exposure Apparatus OperationCarbon ARC Type D 1499Exposure Apparatus OperationFluorescent UV Type G 154Exposure Apparatus OperationXenon ARC Type D 2565Flow Rate D 1238Glass Transition Temperature E 1640Hail Impact Resistance F 320HardnessBarcol D 2583HardnessDurometer D 2240Heating Element
13、sDetection of Flaws F 319Ignition Loss D 2584Impact ResistanceFalling Weight D 5420Impact ResistanceFalling Weight (Polycarbonate) F 736Index of Refraction D 542Interlayer Material Selection F 942Light Transmissivity F 1316Luminous Transmittance and Haze D 1003Optical Angular Deviation F 801Optical
14、Angular DisplacementMultiple Images F 1165Optical Binocular Disparity F 1181Optical Distortion and DeviationDouble Exposure F 733Optical Reflectivity F 1252Peel ResistanceFloating Roller D 3167Rubber Properties in Tension D 412ScratchesIntensity of F 548Shear StrengthFusion Bonded Polycarbonate F 73
15、4Shear Strength and ModulusInterlayer Materials F 1362Softening Temperature D 1525Specific Gravity and Density D 792Specific Heat D 2766Stress Crazing F 791Stress Crazing F 484Tear Resistance D 624Tear ResistanceInitial D 1004Tensile Properties D 638Water Absorption D 5701Copyright ASTM Internationa
16、l, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.D 257 Test Methods for DC Resistance or Conductance ofInsulating MaterialsD 412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTensionD 542 Test Method for Index of Refraction of TransparentOrgani
17、c PlasticsD 543 Practices for Evaluating the Resistance of Plastics toChemical ReagentsD 570 Test Method for Water Absorption of PlasticsD 624 Test Method for Tear Strength of ConventionalVulcanized Rubber and Thermoplastic ElastomersD 638 Test Method for Tensile Properties of PlasticsD 695 Test Met
18、hod for Compressive Properties of RigidPlasticsD 696 Test Method for Coefficient of Linear Thermal Ex-pansion of Plastics Between 30C and 30C with aVitreous Silica DilatometerD 746 Test Method for Brittleness Temperature of Plasticsand Elastomers by ImpactD 785 Test Method for Rockwell Hardness of P
19、lastics andElectrical Insulating MaterialsD 790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating MaterialsD 792 Test Methods for Density and Specific Gravity (Rela-tive Density) of Plastics by DisplacementD 953 Test Method for Bearing Strength of
20、PlasticsD 1003 Test Method for Haze and Luminous Transmittanceof Transparent PlasticsD 1004 Test Method for Tear Resistance (Graves Tear) ofPlastic Film and SheetingD 1044 Test Method for Resistance of Transparent Plasticsto Surface AbrasionD 1238 Test Method for Melt Flow Rates of Thermoplasticsby
21、Extrusion PlastometerD 1499 Practice for Filtered Open-Flame Carbon-Arc Ex-posures of PlasticsD 1525 Test Method for Vicat Softening Temperature ofPlasticsD 2240 Test Method for Rubber PropertyDurometerHardnessD 2565 Practice for Xenon-Arc Exposure of Plastics In-tended for Outdoor ApplicationsD 258
22、3 Test Method for Indentation Hardness of RigidPlastics by Means of a Barcol ImpressorD 2584 Test Method for Ignition Loss of Cured ReinforcedResinsD 2766 Test Method for Specific Heat of Liquids and SolidsD 3167 Test Method for Floating Roller Peel Resistance ofAdhesivesD 5420 Test Method for Impac
23、t Resistance of Flat, RigidPlastic Specimen by Means of a Striker Impacted by aFalling Weight (Gardner Impact)E 1640 Test Method for Assignment of the Glass TransitionTemperature By Dynamic Mechanical AnalysisF 319 Practice for Polarized Light Detection of Flaws inAerospace Transparency Heating Elem
24、entsF 320 Test Method for Hail Impact Resistance ofAerospaceTransparent EnclosuresF 330 Test Method for Bird Impact Testing of AerospaceTransparent EnclosuresF 484 Test Method for Stress Crazing of Acrylic Plastics inContact with Liquid or Semi-Liquid CompoundsF 520 Test Method for Environmental Res
25、istance of Aero-space TransparenciesF 521 Test Methods for Bond Integrity of TransparentLaminatesF 548 Test Method for Intensity of Scratches on AerospaceTransparent PlasticsF 733 Practice for Optical Distortion and Deviation ofTransparent Parts Using the Double-Exposure MethodF 734 Test Method for
26、Shear Strength of Fusion BondedPolycarbonate Aerospace Glazing MaterialF 735 Test Method for Abrasion Resistance of TransparentPlastics and Coatings Using the Oscillating Sand MethodF 736 Test Method for Impact Resistance of MonolithicPolycarbonate Sheet by Means of a Falling WeightF 791 Test Method
27、 for Stress Crazing of Transparent Plas-ticsF 801 Test Method for Measuring Optical Angular Devia-tion of Transparent PartsF 942 Guide for Selection of Test Methods for InterlayerMaterials for Aerospace Transparent EnclosuresF 1165 Test Method for Measuring Angular Displacementof Multiple Images in
28、Transparent PartsF 1181 Test Method for Measuring Binocular Disparity inTransparent PartsF 1252 Test Method for Measuring Optical Reflectivity ofTransparent MaterialsF 1316 Test Method for Measuring the Transmissivity ofTransparent PartsF 1362 Test Method for Shear Strength and Shear Modulusof Aeros
29、pace Glazing Interlayer MaterialsG 154 Practice for Operating Fluorescent Light Apparatusfor UV Exposure of Nonmetallic Materials3. Significance and Use3.1 This guide is intended for use by material suppliers,aircraft transparent enclosure fabricators, air-frame manufac-turers, government agencies,
30、and others that may becomeinvolved in the testing of transparency components. These testmethods provide data on both individual materials and materialcombinations commonly utilized in the fabrications of aero-space transparent enclosures comprised of monolithic plastic,coated monolithic plastic or l
31、aminated constructions contain-ing plastics.3.2 Primary properties and their long term stability arecritical to the performance of aerospace transparent enclosures.Property measurement tests define as-manufactured materialproperties of these materials. Aging procedures provide forexposure of parts o
32、r representative sections to environmentsthat may induce changes in material properties as determinedin property measurement tests. Property measurement testsperformed before and after aging exposure provide a means ofestimating the potential usable life span of a transparency or tocompare the durab
33、ility of one material with another.3.3 When employing these test methods for comparison ofmaterials for weathering effects the user should be aware thatF790082the many factors influencing degradation due to weatheringvary from one location to another. For direct weatheringcomparisons, all material(s
34、) should undergo exposure condi-tions and property measurements testing at the same time.3.4 The test methods listed include those considered criticalto the performance of aircraft transparent enclosures. Other testmethods to evaluate materials may also be performed. Addi-tional test methods are in
35、preparation and will be incorporated.The user is advised to employ the latest revision of any testmethod.3.5 The dominant component of all transparent enclosures isone, or more, rigid transparent sheet(s). The sheet(s) mustpermit the necessary visibility while providing structural in-tegrity and pro
36、tecting the aircraft interior from external envi-ronments as required by the specific aircraft design.3.6 In its most simple form, the rigid transparent sheet maybe the only component of a transparent enclosure.3.7 When more than one rigid transparent sheet is em-ployed, the sheets are laminated wit
37、h a controlled thicknesswith either an air gap or with a transparent adhesive known asan interlayer.3.8 Transparent enclosure designs may use multiple rigidtransparent sheets to take advantage of specific properties ofdifferent materials. In this instance, there will be functionsrequired of one of t
38、he sheets but not the other.3.9 The test methods, practices and guides listed are asummary of the available test methods applicable to plastictransparent enclosures. They are presented in this format tosimplify the search and to enable the user to determine if amethod applicable to his requirements
39、is available.4. Keywords4.1 abrasion; acrylic; adhesion; aerospace; bonding; electri-cal; enclosures; environmental; impact; interlayers; materials;mechanical; optical; physical; plastic; polycarbonate; proper-ties; thermal; transparentASTM International takes no position respecting the validity of
40、any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to r
41、evision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Yo
42、ur comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is cop
43、yrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).F790083
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