1、MIL-PRF-4bLSOA H 9999906 2044203 077 INCH-POUND 1 MIL-PRF-46190A 22 May 1997 SUPERSEDING MIL-P-46190 18 September 1990 PERFORMANCE SPECIFICATION PREPREGS, WOVEN FABRIC, CARBON FIBER, RESIN IMPREGNATED This specification is approved for use by all Departments and Agencies of the Department of Defense
2、. 1. SCOPE 1.1 Scope. This specification establishes the requirements for resin impregnated, high strength, carbon fiber, woven fabric prepregs (see 6.1). 1.2 Classification. Prepregs to be of the class specified (see 6.2): Class A Tow Mechanical properties: Ultimate tensile strength - 500 thousand
3、pounds per square inch (ksi) (3450 MPa) Ultimate tensile strain - 1.40 percent Modulus of elasticity - 32-35 million pounds per square inch (Msi) (220-241 GPa) Class B Tow mechanical properties: Ultimate tensile strength - 650 thousand pounds per square inch(ksi) (4481 MPa) Ultimate tensile strain -
4、 1.40 percent Modulus of elasticity - 39-42 million pounds per square inch (Msi) (269-289 GPa) Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Director, U.S. Army Research Laboratory, Weapons an
5、d Materials Research Directorate, ATTN: AMSRL-W“M, APG, MD 21005-5069 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A ARFA CMPS Provided by IHSNot for ResaleNo reproduction or networking permitted without license
6、from IHS-,-,-MIL-PRF-46190A W 9999906 2044204 T03 W MIL-PRF-46190A 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents in other sections of this specification or recommended for add
7、itional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government document
8、s. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifi
9、cations and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). HANDBOOK DEPARTMENT OF DEFENSE MIL-HDBK-17 - Polymer Matrix Composites, Volume 1 - Guidelines For Characterization Of Structural Materials (Unless otherwise indicated, copies of the above specifications, stan
10、dards, and handbooks are available from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094). 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues
11、 of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation (see 6.2) . AMERICAN SOCIETY FOR TESTING AND MATERIALS
12、 (ASTM) ASTM C613 ASTM D123 ASTM D329 ASTM D695 ASTM D790 ASTM D1505 ASTM D2344 - Standard Test Method for Resin Content of Carbon and Graphite Prepregs by Solvent Extraction - Standard Terminology Relating to Textiles - Standard Specification for Acetone - Standard Test Method for Compressive Prope
13、rties of Rigid Plastics - Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials. - Standard Test Method for Density of Plastics by the Density-Gradient Technique - Standard Test Method for Apparent Interlaminar Shear Strength of Par
14、allel Fiber Composites by Short-Beam Method 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-4bLSOA m SS9%90b 2044205 94T ASTM D2734 ASTM D3039/ D3039M ASTM D3379 ASTM D3410/ D3410M ASTM D3531 ASTM D3532 ASTM D3775 ASTM D3776 ASTM D3800 AST
15、M D3990 ASTM D4018 ASTM D4019 MIL-PRF-46190A Standard Test Methods for Void Content of Reinforced Plastics Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials Standard Test Method for Tensile Strength and Youngs Modulus for High-Modulus Single-Filament Materials Standar
16、d Test Method for Compressive Properties of Polymer Matrix Composite Materials with Unsupported Gage Section by Shear Loading Standard Test Method for Resin Flow of Carbon Fiber-Epoxy Prepreg Standard Test Method for Gel Time of Carbon Fiber-Epoxy Prepreg Standard Test Method for Fabric Count of Wov
17、en Fabric Standard Test Methods for Mass Per Unit Area (Weight) of Woven Fabric Standard Test Method for Density of High-Modulus Fibers Standard Terminology Relating to Fabric Defects Standard Test Methods for Tensile Properties of Continuous Filament Carbon and Graphite Fiber Tows Standard Test Met
18、hod for Moisture in Plastics by Coulometric Regeneration of Phosphorus Pentoxide (Application for copies should be addressed to the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428). SOCIETY OF AUTOMOTIVE AMs 2825 - AMs 3892 - AMs 3892/1 - (Application f
19、or copies ENGINEERS (SAE) Material Safety Data Sheets Fibers, Carbon, Tow and Yarn for Structural Composites Tow or Yarn, Carbon Fibers for Structural Composites GF 400 (2758) Tensile Strength, 33 (228) Tensile Modulus should be addressed to Aerospace Material Specifications, 400 Cohonwealth Drive,
20、Warrendale, PA 15096). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-46190A 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence.
21、 Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.21, a sample shall be subjected to first article inspection in accordance with 4.2.1. 3.2 Recycled, recovered, or env
22、ironmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided the material meets or exceeds all specified requirements and promotes economically advantageous life cycle costs. 3.3 General material requirements.
23、3.3.1 Formulation. The contractor shall select the materials, but the materials shall be capable of meeting all the requirements specified herein. A material consisting of carbon tows that have been woven and impregnated with a resin is recommended. 3.3.2 Fiber. The carbon fiber shall comply with th
24、e property requirements in table I. 3.3.3 Fiber sizing. The fiber shall be treated to be compatible with the resin in accordance with 4.3.3. I 3.4 Woven fabric. 3.4.1 Physical properties. The woven fabric shall conform to the physical properties in table II. 3.4.2 Selvage. The woven fabric shall hav
25、e selvage edges. The procuring activity shall state the selvage width. 3.4.3 Tracer strands. An x-ray detectable glass tracer yarn shall be placed on 2.0 + 0.25 inch centers in the warp direction and 6 + 1 inch centers in the weft direction in each ply of material. The tracer yards shall be AR/CK 32
26、.5 I/O, 1 ounce, size 460 white x-ray detectable glass yarn manufactured by Owens Corning Fiberglas Company (T.;ledo, OH), or an approved equivalent. The tracer yarn materials shall not 03 Jas during processing of the prepreg, or be the cause of thermal microcracx-ng in the composite (see 6.4). 3.4.
27、4 Fabric uniformity. Fabric used for impregnation with the resin shall be produced only after all necessary adjustments have been made on the weaving equipment to provide a uniform product conforming to the requirements of this specification. Nonuniform areas of the fabric at the start or end of the
28、 weaving operation shall be removed prior to packaging. The fabric shall be clean and free from creases, cuts, tears, smash or other damage to two or more adjacent warp or fill yarns. Anomalies affecting a single yarn including missing end, mispick, whipped-in filling, loose pick (whether or not res
29、ulting 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-46190A in a loop), slub, broken pick, hang pick, kink and fuzz ball shall not be considered as nonconforming areas provided no more than three such anomalies occur in any linear yard (m
30、eter) or 1 meter by 0.2 meter area with no anomaly closer than 6 inches (152 mm) to another anomaly. Anomalies in the cosmetic appearance of the woven fabric which are a result of splices in the yarn shall not be considered as nonconforming areas. A float in the warp direction identified as a result
31、 of a single missing end and less than two inches (51 mm) in length shall not be considered as a nonconforming area. A float more than two inches in length or resulting from two adjacent missing ends shall be considered as a nonconforming area. 3.4.5 Materials compatibility. Materials, if any, used
32、on the carbon filaments or yarns or techniques utilized in conjunction with the weaving operation for purposes of assisting the weaving operation shall not interact with or degrade the filament, resin, impregnated fabric or resulting cured and uncured properties, from those specified herein. Such ma
33、terials or techniques, if used, shall not be changed after first article inspection of the product without written approval by the procuring activity. 3.5 Prepreg. 3.5.1 Requirements. The uncured prepreg material shall meet the physical property requirements of table III. Table IV is optional. 3.5.2
34、 Width. Unless otherwise specified (see 6.2), the prepreg width shall be 1067 f 13 mm (42.0 f 0.5 inches). Selvage shall not be included in determining prepreg width. 3.5.3 Alignment. The alignment of the warp and fill yarns shall be perpendicular to each other and shall be parallel to the warp and
35、fill directions of the impregnated fabric within 51 mm (2 inches) in any 1219 mm (48 inches) of fabric width or length. The supplier shall, as a minimum, determine the alignment at the start and end of each roll of impregnated fabric. Straightening of impregnated fabric is not permitted when measuri
36、ng alignment. A tenter frame to correct fiber alignment in impregnated fabric may be used. 3.5.4 Interliner. The prepreg interliner shall be 4 mil (0.1 mm) or greater thick and shall be 12.7 f 6.4 mm (0.50 f 0.25 inches) wider per side than the prepreg. Removal of the interliner paper or polyethylen
37、e film at ambient temperature shall be accomplished with ease and without damage to the prepreg. 3.5.5 Flatness. The prepreg shall contain no buckles or wrinkles. Some wrinkles, buckles and separations between prepreg and release film shall be allowed. The prepreg and its release film shall lay flat
38、 with the edges not raising more than 2.5 mm (O. 1 inches) above a flat table. The prepreg shall lay flat when removed from the release film with no edge curl visually apparent. 3.5.6 Characterization. Prepreg physiochemical property requirements are to be determined (see table IV). 5 Provided by IH
39、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-46190A 3.5.7 Storage. The prepreg shall meet the requirements of this specification when tested at any time up to one year from the date of manufacture provided it has been stored at temperatures not exceedin
40、g manufacturers recommendations. 3.6 Composite laminates (properties of cured laminates). 3.6.1 Cure cycles. Cure and postcure cycle procedures, which include layup/bagging procedures and time-temperature-pressure conditions for the fabrication of composite laminates conforming to this specification
41、, shall be specified in a process specification. 3.6.2 Physical properties. The cured woven fabric laminates shall conform to the physical properties of table V. 3.6.3 Mechanical properties. After 21 days (504 hours) at the above conditions the prepreg shall be cured in laminates meeting the mechani
42、cal property requirements of table VI. 3.7 Rejection. Carbon fiber woven fabric prepreg not conforming to the requirements of this specification shall be rejected. 3.8 Fluid resistance. When immersed in the fluids specified in table VI1 for the exposure times and temperatures specified, the cured co
43、mposite material shall meet the requirements for short beam shear as specified in the applicable specification sheet. In addition, the laminates shall show no visible degradation or damage (i .e. dissolution, gelation, or swelling) . Contact by the cured laminate material shall not alter the propert
44、ies of the fluids as required by their respective specifications. 4. VERIFICATION 4.1 Verification alternatives. Alternative test methods, techniques, or equipment, including the application of statistical process control, tool control, or cost effective sampling procedures may be proposed by the co
45、ntractor. Acceptable alternative verification approaches shall be identified in the contract. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2.1) b. Conformance inspection (see 4.2.2) 4.2.1 First article i
46、nspection. First article inspection shall be performed on the first production-representative samples of an order when a first article sample is required (see 3.1). The first article sample(s) shall be examined for all the provisions specified by the procuring activity, the contract or the purchase
47、order (see 6.2). This inspection shall consist of the tests specified in tables I, II, III, V, VI, and VII. Table IV is optional. 4.2.2 Conformance inspection. Conformance inspection for acceptance of resin impregnated, high strength, carbon fiber, woven fabric prepregs shall meet all 6 Provided by
48、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-46190A m 999%90b 2044209 595 m MIL-PRF-4619OA the provisions specified by the procuring activity, the contract or the purchase order (see 6.2) . 4.3 General material requirements. 4.3.1 Formulation. The ma
49、terial shall be visually examined for conformance to paragraph 3.3.1. 4.3.2 Fiber. The carbon fiber property requirements shall be determined in accordance with the test methods in table I. 4.3.3 Fiber sizing. The standard test method for Resin Flow of Carbon Fiber- Epoxy Prepreg, ASTM D3531, shall be used. 4.4 Woven fabric. 4.4.1 Physical properties. The woven fabric physical properties shall be determined in accordance with the test methods in table II. 4.4.2 F
