1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243TO PLACE A DOCUMENT
3、 ORDER; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.sae.orgCopyright 1989 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICESubmitted for recognition as an American National Sta
4、ndardJ1324REV.OCT89Issued 1981-12Revised 1989-10Superseding J1324 NOV84ACOUSTICAL AND THERMAL MATERIALS TEST PROCEDUREForewordThis document has also changed to comply with SAE Technical Standards Board format. Referenceswere added as Section 2.1. ScopeThis SAE Recommended Practice provides test meth
5、ods for determining the characteristics ofacoustical and thermal materials. Where applicable, methods of test developed by SAE and ASTM have beenreferenced.2. References2.1 Applicable PublicationsThe following publications form a part of this specification to the extent specifiedherein. Unless other
6、wise indicated, the latest version of SAE publications shall apply.2.1.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-001.SAE J315Fiberboard Test ProceduresSAE J1325Test Method for Measuring the Relative Drapeability of Flexible Insulation MaterialsSAE J1326Test M
7、ethod for Measuring Wet Color Transfer CharacteristicsSAE J1351Hot Odor Test for Insulation MaterialsSAE J1352Compression and Recovery of Insulation PaddingsSAE J1355Test Method for Measuring Thickness of Resilient Insulating PaddingsSAEJ1361Hot Plate Methods for Evaluating Heat Resistance and Therm
8、al Insulation Properties ofMaterialsSAE J1389Corrosion Test for Insulation MaterialsSAE J1400Laboratory Measurement of the Airborne Noise Reduction of Acoustical Materials2.1.2 ANSI PUBLICATIONAvailable from ANSI, 11 West 42nd Street, New York, NY 10036-8002.ANSI 1.1-1960 (R 1971)COPYRIGHT Society o
9、f Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J1324 Revised OCT89-2-2.1.3 ASTM PUBLICATIONSAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTMC177Test Method for Steady-State Heat Flux Measurements and Thermal TransmissionProperties by Means o
10、f the Guarded-Hot-Plate ApparatusASTMC384Test Method for Impedance and Absorption of Acoustical Materials by the Impedance TubeMethodASTMC423Test Method for Sound Absorption and Sound Absorption Coefficients by the ReverberationRoom MethodASTMC518Test Method for Steady-State Heat Flux Measurements a
11、nd Thermal TransmissionProperties by Means of the Heat Flow Meter ApparatusASTM C 870Practice for Conditioning of Thermal Insulating MaterialsASTM E 756Method for Measuring Vibration-Damping Properties of MaterialsASTME1050Test Method for Impedance and Absorption of Acoustical Materials Using a Tube
12、, TwoMicrophones, and a Digital Frequency Analysis System3. Terminology3.1 Acoustical Terminology3.1.1 SOUND ABSORPTIONSound absorption is the change of sound energy into some other form, usually heat, inpassing through a medium or on striking a surface.3.1.2 TRANSMISSION LOSSTransmission loss is th
13、e reduction in the magnitude of some characteristic of a signal,between two stated points in a transmission system.3.1.3 DAMPINGDamping is the dissipation of energy with time or distance.NOTEAcoustical terminology adopted from ANSI 1.1-1960 (R 1971).3.2 Thermal Terminology3.2.1 CONDUCTIONThe transfe
14、r of heat from one part of a body to another part of the same body or betweenbodies in physical contact.3.2.2 CONVECTIONThe transfer of heat by movement of the heated and/or cooled particles of a fluid medium.3.2.3 RADIATIONA process of emitting energy electromagnetically. (Thermal radiation differs
15、 from other forms ofheat transfer in that its speed of propagation equals that of light and no intervening medium is required for itstransmission.)3.2.4 EMITTANCEThe ability of a surface to emit radiant energy. It is expressed as the ratio of the radiant energyemitted per unit time, per unit area, b
16、y an opaque material to that by a blackbody at the same temperature.3.2.5 THERMAL CONDUCTIVITY (K-FACTOR)The rate of heat flow through a homogeneous material under steady-state conditions, through unit area, per unit temperature gradient in the direction perpendicular to anisothermal surface.(Eq. 1)
17、k Btuinhft2 F- Wm2 K-=COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J1324 Revised OCT89-3-3.2.6 THERMAL CONDUCTANCE (C-FACTOR)The rate of heat flow under steady-state conditions between twodefinite surfaces at uniform separation, divided by the differenc
18、e of their average temperatures and by thearea of one surface. The average temperature is one which adequately approximates that obtained byintegrating the temperatures of the entire surface.(Eq. 2)3.2.7 THERMAL TRANSMITTANCE (U-FACTOR) (OVERALL COEFFICIENT OF HEAT TRANSFER)The rate of heat flowunde
19、r steady-state conditions from surroundings on one side of a body, through a unit area of the body, tothe surroundings on its opposite side, divided by the temperature difference between the two surroundings.(Eq. 3)3.2.8 TABLE OF ABBREVIATIONSBtu = British thermal unitsft = footh = hourF = degree Fa
20、hrenheitin = inch = metric symbol for thermal conductivityW = wattm = meterK = degree KelvinC = degree Celsius (centrigrade)4. Test Procedures4.1 ThicknessSee SAE J1355.4.2 Mass (Weight) per Unit AreaThe mass (weight) per unit area determination shall be made according to themethod described in SAE
21、J315 Section 6, and shall be reported as kg/m2 (lb/ft2).4.3 DensityThe density shall be calculated, using the thickness and mass (weight) per unit area figures from 4.1and 4.2 and using the formula(Eq. 4)where:d = density in kg/m3 (lb/ft3)M = mass (weight per unit area in kg/m2 (lb/ft2)t = thickness
22、 in m (ft)4.4 Thermal Conductivity (k-Factor)For routine evaluation, quality control, and classification of materials,testing shall be conducted according to the method specified in ASTM C 518. For arbitration purposes, the testmethod specified in ASTM C 177, shall be used. Test results shall be rep
23、orted in units of: or k.The mean temperature, at which the k-Factor was determined, shall be reported. The temperature of the topand bottom platens contacting the surfaces of the test specimen shall also be reported.C Btuhft2 F- CWm2 K-=U Btuhft2 F- UWm2 K-=d Mt-=COPYRIGHT Society of Automotive Engi
24、neers, Inc.Licensed by Information Handling ServicesSAE J1324 Revised OCT89-4-4.5 Resistance to Heat Flow (R-Factor)The R-Factor for a homogeneous material can be calculated from its k-Factor and the thickness (t) of the material by the following formula: (Eq. 5)4.6 Heat ResistanceSee SAE J1361.4.7
25、Resistance of StainingSee SAE J1326.4.8 Stiffness - Drapeability TestSee SAE J1325.4.9 Compression-RecoverySee SAE J1352.4.10 Dimensional StabilityThe linear expansion and contraction shall be determined by the test methodsdescribed in SAE J315.4.10.1 EXPANSIONUse Method A.4.10.2 CONTRACTIONUse Meth
26、od A, followed by Method C.4.11 OdorSee SAE J1351.4.12 CorrosionSee SAE J1389.4.13 Sound Absorption4.13.1 NORMAL INCIDENCETwo standardized methods exist. The differences between the two are in theequipment needed and the time required to perform the test. The results from one should match the other.
27、See ASTM C 384 and ASTM E 1050.4.13.2 RANDOM INCIDENCESee ASTM C 423.4.14 Vibration DampingSee ASTM E 756.4.15 Airborne Noise ReductionSee SAE J1400.5. General Comments5.1 ConditioningSome materials require specific conditioning prior to testing; when applicable, see ASTM C 870.6. Notes6.1 Marginal
28、IndiciaThe change bar (l) located in the left margin is for the convenience of the user in locatingareas where technical revisions have been made to the previous issue of the report. An (R) symbol to the leftof the document title indicates a complete revision of the report.PREPARED BY THE SAE SOUND
29、AND HEAT INSULATION MATERIALS COMMITTEER tk-=COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J1324 Revised OCT89RationaleNot applicable.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThis SAE Recommended Practice provides test method
30、s for determining the characteristics ofacoustical and thermal materials. Where applicable, methods of test developed by SAE and ASTM havebeen referenced.Reference SectionSAE J315Fiberboard Test ProcedureSAE J1325Test Method for Measuring the Relative Drapeability of Flexible Insulation MaterialsSAE
31、 J1326Test Method for Measuring Wet Color Transfer CharacteristicsSAE J1351Hot Odor Test for Insulation MAterialsSAE J1352Compression and Recovery of Insulation PaddingsSAE J1355Test Method for Measuring Thickness of Resilient Insulating PaddingsSAEJ1361Hot Plate Method for Evaluating Heat Resistanc
32、e and Thermal Insulation Properties ofMaterialsSAE J1389Corrosion Test for Insulation MAterialsSAE J1400Laboratory Measurement of the Airborne Noise Reduction of Acoustical MaterialsANSI 1.1-1960 (R 1971)ASTMC177Test Method for Steady-State Heat Flux Measurements and Thermal TransmissionProperties b
33、y Means of the Guarded-Hot-Plate ApparatusASTMC384Test Method for Impedance and Absorption of Acoustical Materials by the Impedance TubeMethodASTMC423Test Method for Sound Absorption and Sound Absorption Coefficients by the ReverberationRoom MethodASTMC518Test Method for Steady-State Heat Flux Measu
34、rements and Thermal TransmissionProperties by Means of the Heat Flow Meter ApparatusASTM C 870Practice for Conditioning of Thermal Insulating MaterialsASTM E 756Method for Measuring Vibration-Damping Properties of MaterialsASTME1050Test Method for Impedance and Absorption of Acoustical Materials Using a Tube, TwoMicrophones, and a Digital Frequency Analysis SystemDeveloped by the SAE Sound and Heat Insulation Materials CommitteeCOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling Services
