1、 AEROSPACE MATERIAL SPECIFICATION Carbon Fiber Tape and Sheet Epoxy 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
2、 suitability 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.
3、 Copyright 2005 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 DOCUM
4、ENT ORDER: Tel: 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 3894EIssued NOV 1972 Revised JAN 1990 Superseding AMS 3894D 1. SCOPE:1.1 Form: This specification and its supplementary detail specifica
5、tions covertape and sheet fabricated using carbon fibers impregnated with epoxy resin.1.2 Application: Primarily for fabricating high-strength and high-moduluscomposite parts, using either hand-layup or a machine for automated-tape-layup.Classification: The tapes and sheets shall be as specified in
6、theapplicable detail specifications, wherein each product is defined byproperty characteristics and continuous service temperature. An example isshown in 8.2. The product covered by each detail specification appears aspart of the title.Safety - Hazardous Materials: While the materials, methods, appl
7、ications,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 is the sole responsibility of theuser to ensure familiarity with the safe and proper use of any hazardo
8、usmaterials and to take necessary precautionary measures to ensure the healthand safety of all personnel involved.1.31.4Reaffirmed JUN 2005 Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 2 - A
9、MS 3894E AMS 36894E2. APPLICABLE DOCUMENTS: The following publications form a part of thisspecification to the extent specified herein. The latest issue of SAEpublications shall apply. The applicable issue of other publications shallbe as specified in AMS 2350.2.1 SAE Publications: Available from SA
10、E, 400 Commonwealth Drive, Warrendale,PA 15096.2.1.1 Aerospace Material Specifications:AMS 2350 - Standards and Test MethodsAMS 2825 - Material Safety Data SheetsAMS 3892 - Fibers, Carbon, Tow and Yarn, for Structural Composites- Interleaf Carrier Material, Composite Tape2.2 ASTM Publications: Avail
11、able from ASTM, 1916 Race Street, Philadelphia, PA19103.- Specific Gravity (Relative Density) and Density ofPlastics by DisplacementASTM D 1505 - Density of Plastics by the Density-Gradient TechniqueASTM D 2344 - Apparent Interlaminar Shear Strength of Parallel FiberComposites by Short Beam MethodAS
12、TM D 2734 - Void Content of Reinforced PlasticsTensile Properties of Fiber-Resin Composites- Fiber Content of Resin-Matrix Composites by MatrixDigestionASTM D 3410 - Compressive Properties of Unidirectional or Crossply Fiber-Resin CompositesASTM D 3529 - Resin Solids Content of Carbon Fiber-Epoxy Pr
13、epregVolatiles Content of Carbon Fiber-Epoxy PrepregASTM D 3531 - Resin Flow of Carbon Fiber-Epoxy PrepregASTM D 3532 - Gel Time of Carbon Fiber-Epoxy PrepregU.S. Government Publications: Available from Commanding Officer, NavalPublications and Forms Center, 5801 Tabor Avenue, Philadelphia, PA 19120
14、.2.3.1 Military Standards:MIL-STD-794 - Parts and Equipment, Procedures for Packaging and Packing of2.4 AIA Publications: Available from National Standards Association, Inc.,1321 14th Street, N.W., Washington, DC 20005.NAS 992 - Reel, Composite Filament Tape, Automated Machine LayupAMS 3898ASTM D 79
15、2ASTM D 3171ASTM D 3039-ASTM D 3530-2.3Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 3 - AMS 3894E AMS 36894E3. TECHNICAL REQUIREMENTS:3.1 Detail Specifications: The requirements for a specif
16、ic product shallconsist of all the requirements specified herein in addition to requirementsspecified in the applicable detail specification. In case of conflictbetween requirements of this basic specification and an applicable detailspecification, requirements of the detail specification shall gove
17、rn.3.2 Material:3.2.1 Construction: The product shall consist of parallel, unidirectionalcarbon fibers meeting the requirements of AMS 3892 and its applicabledetail specification, impregnated with an epoxy resin meeting therequirements of the applicable detail specification, and arranged in asingle
18、in-plane layer.3.2.2 Ends: The product shall contain no unspliced yarn or tow ends. Splicesin the same yarn or tow shall be not less than 10 feet (3 m) apart.Splices in adjacent yarns or tows shall be not less than 12 inches(305 mm) apart.3.2.3 Storage Life: The product, when packaged in water resis
19、tant, heat-sealedbags, shall meet the requirements of the applicable detail specificationafter storage at standard conditions as specified therein.3.2.4 Working Life: The product shall meet the requirements of the applicabledetail specification after exposure for a continuous period at therelative h
20、umidity and temperature specified therein.3.2.5 Bending: The product shall withstand, without visible material damage,bending through an angle of 180 degrees around a 1.0 inch (25 mm) diametermandrel with the fiber direction perpendicular to the axis of bend; 10Xmagnification shall be used in examin
21、ation for damage.3.3 Properties of Uncured Impregnated Material: The as-received product shallconform to the requirements of this specification and the applicable detailspecification, determined on the product as-supplied in accordance with testprocedures specified herein.3.4 Properties of Cured Lam
22、inate: Test laminates shall conform to therequirements of this specification and the applicable detail specification,determined on specimens cut from laminates prepared in accordance with 4.5.3.5 Quality: The product, as received by purchaser, shall be uniform in qualityand condition, free from fore
23、ign material and, except as specified in 3.5.1,free from imperfections detrimental to usage of the product.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 4 - AMS 3894E AMS 36894E3.5.1 Visual I
24、mperfection Criteria: Visible indications of dry spots, voids,crimps, crossed or broken fibers, twisted fibers, irregular carrier,over-impregnation or incomplete impregnation areas are not acceptable ifthe total length of each area exceeds limits indicated below for the totaltape length of the roll:
25、Imperfections CriteriaFilaments not wettedTape not parallel to center lineCrimpsWrinkleUnspliced yarn or towEnd-butt spliced yarn or towCured resin particlesForeign materialsColor uniformityTwists (3.5.1.1)Scrim distortion (when scrim is present)Rippled interleafResin starved areasFiber crossover1%,
26、 maximumParallel within 0.5 degree1%, maximumNone permittedpermittedNone permittedNone permittedpermittedNatural Color2%, maximumTo be determinedTo be determinedTo be determinedTo be determined3.5.1.1 Does not refer to twists inherent in the product.3.6 Tolerances:3.6.1 Width: Shall be as specified
27、in Table I.TABLE INominal Width ToleranceInches InchUp to 1.000, excl As agreed upon1.000 to 3.000, excl +0,-0.0253.000 +0,-0.050Over 3.0000.040 for each 3.000 inchesof widthTABLE I(SI)Nominal WidthMillimetresToleranceMillimetresUp to 25.40, excl As agreed upon25.40 to 76.20, excl +0,-0.6476.20 +0,-
28、1.27Over 76.201.02 for each 76.20 mmof widthNoneNoneCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 5 - AMS 3894E AMS 36894E3.6.2 Fiber Alignment and Spacing: Individual fibers, yarns, and tows
29、 shall beparallel to the tape center line within 0.5 degree along their entirelength. Open space between fibers, yarns, and tows shall each be not morethan 0.040 inch (1.02 mm) wide.4. QUALITY ASSURANCE PROVISIONS:4.1 Responsibility for Inspection: The vendor of the product shall supply allsamples f
30、or vendors tests and shall be responsible for performing allrequired tests.required by 4.6.Results of such tests shall be reported to the purchaser asPurchaser reserves the right to sample and to perform anyconfirmatory testing deemed necessary to ensure that the product conforms tothe requirements
31、of this specification and the applicable detailspecification. 4.2 Classification of Tests:Acceptance Tests: Tests for construction (3.2.1), ends (3.2.2), bending(3.2.5), properties of uncured impregnated material (3.3), longitudinalflexural strength, modulus of elasticity in flexure, and interlamina
32、rshear strength of cured laminate, all at room temperature (3.4), quality(3.5), and tolerances (3.6) are acceptance tests and shall be performed oneach lot.4.2.2 Preproduction Tests: Tests for all technical requirements of thisspecification and the applicable detail specification are preproductionte
33、sts and shall be performed prior to or on the initial shipment of aproduct to a purchaser, when a change in ingredients and/or processingrequires reapproval as in 4.4.2, and when purchaser deems confirmatorytesting to be required.4.2.2.1 For direct U.S. Military procurement, substantiating test data
34、 and, whenrequested, preproduction test material shall be submitted to thecognizant agency as directed by the procuring activity, contractingofficer, or request for procurement.4.2.14.3 Sampling and Testing: Shall be as follows; the number of specimens to be0 sampled shall be the minimum number of s
35、pecimens tested:4.3.1 For Acceptance Tests:4.3.1.1 Each Roll: Sufficient product shall be taken from each roll to perform0 tests for fiber and resin content (3.2.1), ends (3.2.2), bending(3.2.5), quality (3.5), and tolerances (3.6) of the uncured product.0 to determine compliance to the requirements
36、 for uncured material (3.3).4.3.1.2.1 A lot shall be all product produced in a single production run fromthe same batches of raw materials under the same fixed conditions andpresented for vendors inspection at one time.4.3.1.2 Each Lot: Sufficient product shall be taken at random to perform testsCop
37、yright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE - 6 - AMS 3894E AMS 36894E4.3.1.3 Each 5000 Square Feet (465 m2): Sufficient product shall be taken at0 random from each lot to perform tests for long
38、itudinal flexuralstrength, modulus of elasticity in flexure, and interlaminar shearstrength of cured laminate at room temperature (3.4).4.3.2 For Preproduction Tests: As agreed upon by purchaser and vendor.4.4 Approval:4.4.1 Sample product shall be approved by purchaser before product forproduction
39、use is supplied, unless such approval be waived by purchaser.Results of tests on production product shall be essentially equivalent tothose on the approved sample product.4.4.2 Vendor shall use ingredients, manufacturing procedures, processes, andmethods of inspection on production product which are
40、 essentially the sameas those used on the approved sample product. If necessary to make anychange in ingredients, in type of equipment for processing, or inmanufacturing procedures, vendor shall submit for reapproval a statementof the proposed changes in ingredients and/or processing and, whenreques
41、ted, sample product. Production product made by the revisedprocedure shall not be shipped prior to receipt of reapproval.04.5 Test Methods: Tests to determine conformance to the requirements of thisspecification and the applicable detail specifications shall be conducted asfollows:Minimum Number ofR
42、equirement Specimens per Test Test ProcedureVolatile Content 1 ASTM D 3530Resin Solids Content 2 ASTM D 3529Resin Flow 1 ASTM D 3531Gel Time 1 ASTM D 3532Tack, Time Adherence 1 4.5.2Tack, Peel Strength 1 4.5.3Visual Imperfections 1 4.5.4Tensile Strength andModulus of Elasticity 4 ASTM D 3039Compress
43、ive Strength andModulus of Elasticity 4 ASTM D 3410Flexural Strength andModulus of Elasticity 4 4.5.5Interlaminar Shear Strength 4ASTM D 2344DensityVoid Content 34.5.6ASTM D 2734Fiber Content 3 ASTM D 31713Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproductio
44、n or networking permitted without license from IHS-,-,-SAE - 7 - AMS 3894E AMS 36894E4.5.1 Preparation of Test Laminates: Test laminates of suitable thickness andarea shall be prepared from sufficient plies of impregnated productoriented unidirectionally and cured in an autoclave, or equivalent, at
45、atemperature and pressure to provide optimum properties. Details of time,temperature, rate of heating, and pressures used in the cure cycle shallbe noted in the report. The resultant laminate shall be uniform inthickness within 0.003 inch ( 0.08 mm) and shall have a fiber volume of60% 3. The thickne
46、ss per ply shall be within 0.0004 inch (O.O1O mm)of the nominal cured thickness, determined from the equation:TWhere, T = Thickness per ply in inches (mm)A = Thickness of test panel in inches (mm)B = Number of plies in panel4.5.2 Tack, Time Adherence:4.5.2.1 Cut two pieces of product, approximately
47、1 x 3 inches (25 x 76 mm),retaining the protective film until immediately before using thespecimens. Fiber direction shall be parallel to the 1 inch (25 mm)dimension. For product under 3 inches (76 mm) in nominal width, butttogether sufficient pieces of the panel to produce a 3 inch (76 mm) widespec
48、imen.=AB-4.5.2.2 Remove the protective film from one face of one specimen and apply thespecimen to the center of a clean piece of austenitic,corrosion-resistant steel sheet with a commercial 2D finish, anythickness by approximately 4 x 8 inches (102 x 203 mm). Apply lightpressure with a squeegee or
49、roller over the backing film. Remove thebacking film and apply the second specimen to the first, in exactly thesame manner, making sure the opposing faces of the specimens are notcovered with protective backing film. The second layer of narrowmaterial shall be so positioned that the butt joints do not coincidewith those of the first layer. Remove the protective film from theexposed surface of the specimens and maintain the test plate and thelong
