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 entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2015 SAE InternationalAll rights reserved. No part of this publi
3、cation 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: Tel: 877-606-7323 (inside USA and Canada)Tel: +1 724-776-4970 (out
4、side USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS3961/2AEROSPACEMATERIAL SPECIFICATIONAMS3961/2Issued 2015-12350 F Autoclave Cure, Low Flow
5、 Toughened Epoxy Prepregs, Type 35, Class 1, Grade 190, Fiber 2RATIONALEWidely distributed and available industry material specifications are required for procurement of composite materials whose allowables data is published in CMH-17. NOTICEThis report is published by SAE to advance the state of te
6、chnical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsiblility of the user.1. SCOPEThe intent of this specification is for the procurement of
7、 the material listed on the QPL and, therefore, no qualification orequivalency threshold values are provided. Users that intend to conduct a new material qualification or equivalency program shall refer to the Quality Assurance section of the base specification, AMS3961.All material qualification an
8、d equivalency data has been archived and is available for review upon request. Contact the CMH-17 Secretariat (www.cmh17.org) for additional information.1.1 FormThis detail specification along with the base specification, AMS3961, establish the requirements for continuous unidirectional carbon fiber
9、 impregnated with a modified B-staged epoxy resin (“unidirectional tape prepreg”). The prepreg is produced using a hot-melt process. 1.2 Classification1.2.1 ReinforcementThis reinforcement classification consists of the following Styles and Grades.1.2.1.1 Style shall specify the carbon fiber tow twi
10、st. For example, Style NT Never Twisted TowNT is the default style. When style is not specified in purchase order, Style NT shall be supplied.SAE INTERNATIONAL AMS3961/2 Page 2 of 141.2.1.2 Grade shall specify the carbon fiber tow size (i.e., the nominal number of filaments in a tow or nominal filam
11、ent count), where 1K denotes 1,000 filaments. For example, Grade 12K 12,000 filaments in a tow.All Prepreg products qualified to this detail specification have the following classification: Type 35, Class 1, Grade 190, Fiber 2.1.2.2 PrepregAll Prepreg products qualified to this detail specification
12、have the following classification: Type 35, Class 1, Grade 190, Fiber 2, ST.1.2.2.1 TypeType shall specify the nominal prepreg resin content. For example: Type 35 Nominal resin content 35% by weight.1.2.2.2 ClassClass shall specify prepreg product form. For example: Class 1 Unidirectional carbon fib
13、er prepreg.1.2.2.3 GradeGrade shall specify nominal fiber areal weight in grams per square meter (gsm). For example: Grade 190 to 190 gsm nominal fiber areal weight.1.2.2.4 Fiber TypeThe carbon fiber type is designated as follows: Fiber 2: Intermediate Modulus (38-42 Msi). 1.2.2.5 Service Temperatur
14、e CapabilityThe service temperature capability, used to establish the batch acceptance test temperature requirements, shall be designated as follows:ST (Standard Temperature) - service temperature of -65 to 180 F All batch acceptance testing shall be performed at room temperature dry (70 10 F)ET (El
15、evated Temperature) service temperature of -65 to 250 F A portion of the batch acceptance tests shall be performed at elevated temperature dry (250 F 10F).Note: If no service temperature capability is identified in the product nomenclature, then “ST” shall be the default designation2. APPLICABLE DOC
16、UMENTSThe issue of the following documents in effect on the date of the purchase order forms a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been
17、cancelled and no superseding document has been specified, the last published issue of that document shall apply.2.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USAand Canada) or +1 724-776-4970 (outside USA), www.sae.
18、org.Base SpecificationAMS3961 350 F Autoclave Cure, Low Flow Toughened Epoxy Prepregs (Base Specification)CMH-17 Composite Materials Handbook SAE INTERNATIONAL AMS3961/2 Page 3 of 142.2 ASTM PublicationsAvailable from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19
19、428-2959, Tel: 610-832-9585, www.astm.org,ASTM D1423 Standard Test Method for Twist in Yarns by Direct-CountingASTM D4018 Standard Test Methods for Properties of Continuous Filament Carbon and Graphite Fiber TowsASTM D2344 Short-Beam Strength of Polymer Matrix Composite Materials and their Laminates
20、 ASTM D3039 Tensile Properties of Polymeric Matrix Composite MaterialsASTM D3529/D 3529M Matrix Solids Content and Matrix Content of Composite PrepregASTM D3530/D 3530M Volatiles Content of Composite Material PrepregASTM D3531 Standard Test Method for Resin Flow of Carbon Fiber-EpoxyASTM D3532 Gel T
21、ime of Carbon Fiber-Epoxy PrepregASTM D3776 Mass per Unit Area (Weight) of FabricASTM D6641 Compressive Properties of Polymer Matrix Composite Laminates Using a Combined Loading Compression (CLC) Test FixtureASTM E168 General Techniques of Infrared Quantitative AnalysisASTM E1252 Standard Practice f
22、or Obtaining Infrared Spectra for Qualitative Analysis2.3 OSHA PublicationsAvailable from U.S. Department of Labor/OSHA, 200 Constitution Avenue, Washington, DC 20210, Tel: 800-321-6742, www.osha.gov/pls/publications/pubindex.list.29CFR-1910.1200 Hazard Communication2.4 SACMA StandardsAvailable from
23、 American Composites Manufacturers Association, 1010 North Glebe Road, Suite 450, Arlington, VA 22201, Tel: 703-525-0511, www.acmanet.org.SACMA SRM 10R-94 Calculation of Fiber Volume of Composite Test LaminatesSACMA SRM 18R-94 Glass Transition Temperature (Tg) Determination by DMA of Oriented Fiber
24、Resin CompositesSACMA SRM 20R-94 High Performance Liquid Chromatography of Thermoset ResinsSACMA SRM 23R-94 Resin Content and Fiber Area Weight of Thermoset Prepreg with Destructive TechniqueSACMA SRM 25R-94 Onset Temperature and Peak Temperature for Composite System Resins Using Differential Scanni
25、ng Calorimetry (DSC)SACMA SRM 14R-94 SACMA Recommended Method for Determination of Sizing Content on Carbon FibersSAE INTERNATIONAL AMS3961/2 Page 4 of 142.5 DefinitionsFor definitions that are not provided in this specification or other applicable AMS specifications, the definitions in DOT/FAA/AR-0
26、6/10 or DOT/FAA/AR-07/3 shall apply. For definitions not provided in DOT/FAA/AR-06/10, the definitions in ASTM D3878 shall apply. For definitions not provided in ASTM D3878, the definitions in CMH-17 shall apply.BASE SPECIFICATION - A specification containing the basic requirements for a carbon fibe
27、r and prepreg material system. The base specification is used in combination with a detail specification to create the unique requirements for a carbon fiber and prepreg product.CARBON OR GRAPHITE FIBER - Interchangeable terms used for continuous filament strands produced in accordance with this spe
28、cification. Typically, graphite fiber is processed at temperature above 2,000 C, all standard and intermediate modulus carbon fiber is processed below 1,600 C.CARBON FIBER LOT - See 3.2.2.10.CARBON FIBER TOW - An untwisted, never twisted or twisted bundle of continuous carbon filaments.DATE OF MANUF
29、ACTURE - The date (day or month) a lot of fiber (carbon or PAN) is manufactured. If the production run extends into the following month, the start date (day or month) is recorded.DETAIL SPECIFICATION - A specification containing requirements that is used in combination with a base specification to c
30、reate the unique requirements for a fiber product.DOFF (noun) - All spools of fiber within a lot that are taken off the take-up winders within a given time period. A unique doff number is typically assigned to the spools. However, some manufacturers do not assign doff numbers because the spools are
31、doffed independently when they reach the correct weight during production.DOFF (verb) - To remove spools of fiber from the take-up winders.DOFF AVERAGE - The average of test results for all specimens tested from the same doff sample.DOFF SAMPLE - A fiber tow sample removed from the take-up winders i
32、n accordance with SACMA SRM 12. Doff sample zero (0) is the sample taken at start-up.DOWN SPOOLING - A procedure that creates multiple spools from a single spool.FOREIGN MATERIALS - All materials not characteristic of the product, such as materials that are not carbon fiber or not PAN fiber.NEVER TW
33、ISTED TOW - A tow that has never been twisted; denoted by the symbol “NT.”POLYACRYLONITRILE (PAN) - A polymer used as a precursor product for carbon fiber production.PAN LOT - PAN fiber manufactured in a single production run on the same equipment within a defined set of process parameters.PURCHASER
34、 - Any organization that procures product in conformance to this basic specification and its associated detail specification.QUALIFIED PRODUCT LIST - Qualified product list established for a given detail material specification.RE-SPOOLING - A procedure that creates a single spool from multiple spool
35、s. Also a procedure that winds material from a single spool onto a different (sometimes smaller or larger diameter) spool.RUN - (As used in fiber production) a continuous (uninterrupted) manufacturing process in which carbon fiber is produced.SIZING - A polymeric coating applied to carbon fiber tows
36、 to improve adhesion to resin systems and handling characteristics for subsequent processes (for example, weaving, or impregnation).SAE INTERNATIONAL AMS3961/2 Page 5 of 14SPLICE - A tow that has been cut or broken and subsequently had the ends rejoined.MANUFACTURER - The organization manufacturing
37、and certifying production to this specification.MANUFACTURER PRODUCT DESIGNATION - The identification or name given to the product by the manufacturer.SURFACE TREATMENT - A treatment applied to fiber to improve the bond between the fiber surface and the resin matrix in a composite material.TOW - A s
38、trand of continuous fibers carbon fibers are supplied in the form of tows. A tow can nominally contain from 500 to 48,000 carbon fiber filaments. Typical tow counts (number of filaments within a tow) are 3,000 (or 3K), 6,000 (or 6K), 12,000 (or 12K), and 24,000 (or 24K). Larger tows are also availab
39、le but not commonly used in aerospace applications.TRANSITION MATERIAL - Material which is removed from the line during non-steady-state production because of process interruptions or start-up.TWISTED TOW - Tow with intentional twist in its final form; denoted by the symbol “TT” or “ST”.UNTWISTED TO
40、W - Previously twisted tow that has had its twist removed in its final form; denoted by the symbol “UT.”WINDERS - Equipment used to collect the carbon fiber on the spool cores at the end of the carbon fiber conversion processes (end of the carbon fiber line). Also known as take-up winders.3. TECHNIC
41、AL REQUIREMENTS3.1 General RequirementsIn case of conflict between requirements of the basic specification and this detail specification, requirements of this detailspecification shall govern. 3.2 Constituent Material Requirements3.2.1 Epoxy Resin SystemUp to 15% resin blending is allowed per resin
42、batch.3.2.2 Reinforcement3.2.2.1 Carbon Fiber Tow CompositionCarbon fiber tows shall be composed of carbon filaments manufactured from polyacrylonitrile (PAN) precursor. All raw material ingredients and auxiliary materials used in the manufacture of carbon fibers shall be controlled by material or p
43、rocurement specifications. The carbon fiber manufacturer shall ensure that the PAN manufacturer produces uniform and consistent PAN fiber precursor within the PCD control limits. These controls shall include constituent ingredients and ratios, PAN lot definition, and shelf life requirements. A fiber
44、 lot must contain 85% PAN from a single lot; blending is permitted from up to three additional PAN lots not to exceed 15% of the tows in the lot.3.2.2.2 Fiber Surface TreatmentCarbon fiber tow may be surface treated to enhance the fiber/matrix interface of the composite material. The surface treatme
45、nt methods and levels, if used during the material qualification program, shall be considered an integral part of the qualified product and cannot be changed without prior approval from the Qualifying Agency.SAE INTERNATIONAL AMS3961/2 Page 6 of 143.2.2.3 SizingSizing may be applied to the fiber dur
46、ing manufacture to improve the handling properties and adhesion to the matrix systems during subsequent processes. When applied, any sizing shall be applied in a continuous process throughout the carbon fiber lot production and shall be considered an integral part of the qualified product. Sizing ty
47、pe, sizing level, and dryingmethods cannot be changed without prior approval from the Qualifying Agency3.2.2.4 TwistCarbon fiber tow twist classification (NT, TT, ST, or UT), as specified on the QPL, and considered an integral part of the qualified product that cannot be changed without prior approv
48、al from the Qualifying Agency. 3.2.2.5 SplicesSplicing is not permitted for the reinforcement qualified to this specification.3.2.2.6 Re-spoolingCarbon fiber tow re-spooling requirements shall be given the PCD. If no reference is made in the PCD, no re-spooling shall be allowed. Re-spooling procedur
49、es, equipment, additional tests, and inspection frequency shall be documented in the PCD. When creating a single spool from multiple spools, fibers from the same doff and fiber lot shall be used. Traceability to its parent spools, doffs, and fiber lot shall be maintained. Re-spooled carbon fiber tow shall not exhibit characteristics detrimental to handling, weaving, impregnation, or structural properties. In
