1、 AEROSPACE MATERIAL SPECIFICATION Cloth, Carbon Fiber, Resin Impregnated 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 entirely voluntary, and its applicability and suitability
2、for any particular use, including any patent infringement arising therefrom, 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. Copyright 20
3、05 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Te
4、l: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS: http:/www.sae.org AMS 3897Issued OCT 1988 Reaffirmed MAY 2005 1. SCOPE:1.1 Form: This specification and its supplementary detail specifications covercontinuous multifilame
5、nt carbon tow woven into fabric and impregnated withuncured resin.1.2 Application: Primarily for fabricating composite parts where thecharacteristics of woven fabric ar e desired.1.3 Classification: The requirements specified herein and in the applicabledetail specifications define each cloth by fib
6、er, resin, style, and type ofweave.1.4 Safety - Hazardous Materials: While the materials, methods, applications,and processes described or referenced in this specification may involve theuse of hazardous materials, this specification does not address the hazardswhich may be involved in such use.It i
7、s the sole responsibility of theuser to ensure familiarity with the safe and proper use of any hazardousmaterials and to take necessary precautionary measures to ensure the healthand safety of all personnel involved.2. APPLICABLE DOCUMENTS: The following publications form a part of thisspecification
8、 to the extent specified herein.Material Specifications shall apply.The latest issue of Aerospaceshall be as specified in AMS 2350.The applicable issue of other documents2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale,PA 15096.2.1.1 Aerospace Material Specifications:AMS
9、2350 Standards and Test MethodsAMS 2825 - Material Safety Data SheetsAMS 3892 Fibers, Carbon (Graphite) Tow and Yarn, for StructuralComposites-Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 2
10、- AMS 3897 AMS 38972.2 ASTM Publications: Available from American Society for Testing andMaterials, 1916 Race Street, Philadelphia, PA 19103.ASTM D123- Terminology Relating to Textile MaterialsASTM D790 - Flexural Properties of Unreinforced and Reinforced Plasticsand Electrical Insulating MaterialsA
11、STM D792 - Specific Gravity (Relative Density) and Density of Plastics byDisplacementASTM D1505 - Density of Plastics by the Density-Gradient MethodASTM D1682 - Breaking Load and Elongation of Textile FabricsASTM D2344 - Apparent Interlaminar Shear Strength of Parallel FiberComposites by Short Beam
12、MethodASTM D2734 - Void Content of Reinforced PlasticsASTM D3039 - Tensile Properties of Fiber-Resin CompositesASTM D3171 - Fiber Content of Resin-Matrix Composites by Matrix DigestionASTM D3410 - Compressive Properties of Unidirectional or CrossplyFiber-Resin CompositesASTM D3529 - Resin Solids Con
13、tent of Carbon Fiber-Epoxy PrepregASTM D3530 - Volatiles Content of Carbon Fiber-Epoxy PrepregASTM D3531 - Resin Flow of Carbon Fiber-Epoxy PrepregASTM D3532 - Gel Time of Carbon Fiber-Epoxy PrepregASTM D3775 - Fabric Count of Woven FabricASTM D3776 - Mass per Unit Area (Weight) of Woven Fabric2.3 U
14、.S. Government Publications: Available from Commanding Officer, NavalPublications and Forms Center, 5801 Tabor Avenue, Philadelphia, PA 19120.2.3.1 Military Standards:MIL-STD-794 -Parts and Equipment, Procedures for Packaging and Packing of3.3. TECHNICAL REQUIREMENTS:3.1 Detail Specifications: The r
15、equirements for a specific cloth shall consistof all the requirements specified herein in addition to the requirementsspecified in the applicable detail specification. In case of conflictbetween requirements of this basic specification and an applicable detailspecification, requirements of the detai
16、l specification shall govern.3.2 Material:3.2.1 Construction: The product shall consist of parallel continuous carbonfibers, woven into the specified fabric style, impregnated with uncuredresin, and arranged in a single in-plane layer.Copyright SAE International Provided by IHS under license with SA
17、ENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 3 - AMS 3897 AMS 38973.2.2 Fiber: The cloth shall be woven from AMS 3892/ carbon fiber tows or asotherwise specified by purchaser. The carbon fiber tow shall be anuntwisted strand for both the warp and fill. A
18、resin compatible finish ortreatment may be applied to promote weaving, impregnation, or fiber-matrixinteraction.3.2.3 Resin Matrix: The woven fabric shall be impregnated with a matrix resinyielding a product meeting the requirements of the detail specification.Impregnation shall be either by the sol
19、vent or hot melt method.3.2.4 Alignment: The alignment of the warp and fill yarns shall beperpendicular to each other and shall be parallel to the warp and filldirection of the impregnated cloth within three degrees (four degrees forthe first and last 10 yards (9 m) on a roll).3.2.5 Selvage: Shall n
20、ot exceed 1.5 inches (38 mm) on each side.3.2.6 Tracer Yarns: Tracer yarns shall be placed in the woven cloth. Traceryarns shall be aramid or other material specified by purchaser. No carbonfiber warp or fill yarns may be deleted to incorporate the tracer yarn.Tracer yarns shall be as follows:Tracer
21、 SpacingWarp 195 Denier 1.75 2.25 inches (44.4 57.2 mm)Fill 380 Denier 5 7 inches (127 178 mm)3.2.7 Storage Life: The product, when packaged in waterproof, heat-sealed bags,shall meet the requirements of the applicable detail specification afterstorage as specified therein.3.2.8 Working Life: The pr
22、oduct shall meet the requirements of the applicabledetail specification after exposure for a continuous period at therelative humidity and temperature specified in Figure 1.-Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted withou
23、t license from IHS-,-,-SAE - 4 - AMS 3897 AMS 3897FIGURE 115I I 1 .18 21 24 WC(65) (70) (75) (6O.F)Tmntm3.3 Properties of Uncured Impregnated Material: The as-received product shallconform to the requirements of this specification and to the applicabledetail specification.Tests shall be performed on
24、 the product as-suppliedin accordance with test procedures specified herein.3.4 Properties of Cured Laminate: Test laminates shall conform to therequirements of this specification and the applicable detail specification.Tests shall be performed on specimens cut from laminates prepared and testedin a
25、ccordance with 4.4.1.3.5 Quality: The product, as received by purchaser, shall be uniform in qualityand condition and free from foreign material and from imperfectionsdetrimental to usage of the product.more than ten major, or equivalent minor (2 minors = 1 major) imperfections,based on the followin
26、g imperfection classification:Imperfection Description and Limitation ClassificationBias or bowedfillingDistorted from horizontal bymore than 3 inches (76 mm) fortionately for all other widthsMinorBaggy, ridgy,or wavy clothBaggy, ridgy, Clearly noticeable Major3.6 Imperfections: In any 100 yd (91.4
27、m) of pabric supplied, there shall be no38 inches (965 mm) and prpor-Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 5 - AMS 3897 AMS 3897Cut or tear 2 inches (51 mm) or over incombined directi
28、onsMajorUnder 2 inches (51 mm) but over1/4 inch (6.4 mm) in combineddirectionsMinordiameterHole 1/2 inch (12.7 mm) or over in MajorUnder 1/2 inch(12.7 mm) in diameter MinorSpots, streaks Clearly noticeable 2 inches (51 mm)or over in combined directionsMajorClearly noticeable under 2 inches(51 mm) in
29、 combined directionsMinorTender orweak spotClearly noticeable 2 inches (51 mm) Majoror over in combined directionsClearly noticeable under 2 inches Minor(51 mm) but over 1/4 inch (6.4 mm) incombined directionsSmashBroken or missingends or picksFloats3 inches (76 mm) or over in combineddirectionsUnde
30、r 3 inches (76 mm) in combineddirections3 or more contiguous regardless oflength of 2 contiguous over 36 inches(914 mm) in length2 contiguous under 36 inches (914 mm)in length2 inches (51 mm) or over in combineddirectionsUnder 2 inches (51 mm) in combineddirectionsMajorMinorMajorMinorMajorMinorCoars
31、e orlight placeOver l/2 inch (51 in widthcausing thickness outside limitsspecified in 3.2.2Minor(51 mm)Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 6 - AMS 3897 AMS 3897Selvage defectsCrease
32、 over on selfBrittle or fusedareaUneven finishCut or tornCurled or folded underHard, embedded and foldedMajorMinorMajorMajorThin areas where impregnatis missing or insufficiention resi n Major3.7 Tolerances: Shall be as follows:3.7.1 Width:TABLE I Width, Inches Tolerance, Inch (Plus Only)Up to 42, i
33、ncl 0.50Over 42 to 49, incl 0.75Over 49 1.00TABLE I (SI)Width, Millimetres Tolerance, Millimetres (Plus Only)Up to 1067, incl12.7Over 1067 to 1245, incl19.0Over 124525.4Any4. QUALITY ASSURANCEPROVISIONS:4.1 Responsibility for Inspection:The vendor of cloth shall supply all samplesfor vendors tests a
34、nd shall be responsible for performing all requiredtests.by 4.5.Results of such tests shall be reported to the purchaser as requiredPurchaser reserves the right to sample and to perform anyconfirmatory testing deemed necessary to ensure that the cloth conforms tothe requirements of this specificatio
35、n.4.2 Classification of Tests: Tests to determine conformance to all technicalrequirements of this specification are classified as acceptance tests and aspreproduction tests and shall be performed prior to or on the initialshipment of cloth to a purchaser, on each lot, when a change in material,proc
36、essing, or both requires reapproval as in 4.4.2, and when purchaserdeems confirmatory testing to be required.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 7 - AMS 3897 AMS 38974.2.1 For direc
37、t U.S. Military procurement, substantiating test data and, whenrequested, preproduction test material shall be submitted to the cognizantagency as directed by the procuring activity, contracting officer, orrequest for procurement,4.3 Sampling: Shall be as follows; a lot shall be all cloth produced i
38、n asingle production run under the same fixed conditions and presented forvendors inspection at one time:4.3.1 Visual Examination of Rolls:100% of each roll, on loom as woven and asimpregnated.4.3.2 Fabric Tests:Samples for test shall be taken at random from each lot inaccordance with TableII. Excep
39、t as noted in 4.3.2.1, the number ofdeterminations for each requirement shall be as specified in theapplicable test procedure or, if not specified therein, in accordance with4.4.TABLE II SAMPLE SIZE FOR TESTS OF CARBON CLOTHLot Size, Yards Sample Size, YardsUpto 3,200, incl 2Over 3,200 to 22,000, in
40、cl 3Over22,0005TABLE II (SI)Lot Size, Metres Sample Size, MetresUpto 2,926, incl 1.8Over 2,926 to 20,117, incl 2.7Over 20,117 4.64.3.2.1 When a statistical sampling plan and acceptance quality level (AQL) haveof 4.5.1 shall state that such plan was used.accordance with such plan in lieu of sampling
41、as in 4.3.2 and the reportbeen agreed upon purchaser and vendor, sampling shall be inCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 8 - AMS 3897 AMS 38974.4 Test Methods: Tests to determine co
42、nformance to the requirements of thesupplementary detail specifications shall be conducted as follows:Requirement Specimens per Test Test ProcedureGel Time 1Tensile Strength andModulus of Elasticity Compressive Strength andModulus of ElasticityFlexural Strength andModulus of Elasticity 4Interlaminar
43、 Shear Strength 4Density 34 ASTM D30394ASTM D3530Resin Solids Content 3 ASTM D3529Resin Flow 1 ASTM D3531ASTM D3532ASTM D3410ASTM D790ASTM D23444.4.3ASTM D2734Fiber Content 3 ASTM D31714.4.1 Preparation of Test Laminates: Test laminates of suitable thickness andarea shall be prepared from sufficient
44、 plies of impregnated material curedin an autoclave or equivalent at a temperature and pressure as specifiedby the detailed specification to provide optimum properties. Details oftime, temperature, rate of heating, and pressures used in the cure cycleshall be noted in the report. The resultant lamin
45、ate shall be uniform inthickness within 0.003 inch 0.08 mm) and shall have a fiber volume asspecified. The thickness per shall be within 10% of the specifiedcured thickness determined from the equation:Where, T = Thickness per ply in inches (mm)A = Thickness of test panel in inches (mm)B = Number of
46、 plies in panel4.4.2 Tack: Shall be determined as agreed upon by purchaser and vendor.4.4.3 Density: Shall be determined in accordance with ASTM D792 using asuitable nonaqueous liquid or in accordance with ASTM D1505 on the testlaminate prepared as specified in 4.4.1.(plyBT=AMinimum Number ofVolatil
47、e Content1Void Content 34.5 Approval:Sample cloth shall be approved by purchaser before cloth for productionuse is supplied, unless such approval be waived by purchaser,Results oftests on production cloth shall be essentially equivalent to those on theapproved sample.4.5.1Copyright SAE International
48、 Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 9 - AMS 3897 AMS 38974.5.2 Vendor shall use ingredients, manufacturing procedures, processes, andmethods of inspection on production cloth which are essentially the samett+ change iningredients,in type of equipment for processing, or inmanufacturing procedures, vendo
