1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and enginee ring sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, 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 invit es your written comments and suggestions.Copyright 1998 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.
3、S.A.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-7161 FAX: (724) 776-0243TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS: http:/www.sae.org400 Commonwealth Drive, Warrendale, PA 15096-0001AEROS PACE MATERIAL SPECIFIC ATIONSubmitted for recognition as an American National
4、 StandardAMS 3834AIssued JAN 1984Revised MAY 1998Cloth, Type “E” Glass, “B” Stage Polyester-Resin-Impregnated7781 Style Fabric, Flame Resistant, Improved StrengthFOREWORDChanges in this revision are format/editorial only.1 SCOPE:1.1 Form: This specification covers a style 7781 glass cloth impregnate
5、d with a heat-curable polyester resin system, the resin being processed to a “B” stage condition, and furnished in the form of continuous rolls.1.2 Application: Primarily for vacuum-bag molded, flame resistant laminates used up to 80 C (180 F).2. APPLICABLE DOCUMENTS:The following publications form
6、a part of this specification to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order.2.1 SAE Publications:Available from SAE, 400 Commonwealth Drive, Warrendale, PA 150
7、96-0001.AMS 2350 Standards and Test MethodsAMS 2825 Material Safety Data SheetsAMS 3824 Cloth, Type “E” Glass, Finished for Resin LaminatesCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3834A SAE
8、AMS 3834A- 2 -2.2 ASTM Publications:Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM D 638 Tensile Properties of PlasticsASTM D 695 Compressive Properties of Rigid PlasticsASTM D 790 Flexural Properties of Plastics and Electrical Insulating MaterialsASTM D 2344 Appar
9、ent Interlaminar Shear Strength of Parallel Fiber Composites by Short Beam MethodASTM D 2584 Ignition Loss of Cured Reinforced ResinsASTM D 3530 Volatiles Content of Carbon Fiber - Epoxy PrepregASTM F 501 Aerospace Materials Response to Flame with Vertical Test Specimen (for Aerospace Vehicles Stand
10、ard Conditions)2.3 U.S. Government Publications:Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.MIL-STD-794 Parts and Equipment, Procedures for Packaging and Packing of3. TECHNICAL REQUIREMENTS: 3.1 Material: 3.1.1 Reinforcement: Shall
11、conform to AMS 3824, Style 7781.3.1.2 Resin: Shall be a low-pressure-laminating polyester resin modified as necessary to meet the requirements of 3.2, 3.3, and 3.4.3.2 Shelf Life: The impregnated cloth shall have a shelf life of not less than six months from date of receipt by purchaser when stored
12、below 7 C (45 F) in moisture-proof, sealed containers.3.3 Working Life: The impregnated cloth shall meet the requirements of 3.4 when tested after continuous exposure of up to 20 days within the relative humidity and temperature limits shown in Figure 1.Copyright SAE International Provided by IHS un
13、der license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3834A SAE AMS 3834A- 3 -FIGURE 1 - Working Life Exposure Conditions3.4 Properties: Impregnated cloth shall conform to the following requirements:3.4.1 Uncured Impregnated Cloth: Shall conform to
14、the following requirements; tests shall be performed on the cloth after warming to above the dew point in its sealed, moisture-proof container prior to sampling and in accordance with specified test methods in Table 1:TABLE 1Volatiles, % by weight, max 2% 4.5.2Resin Solids Content (Volatile Free),%
15、by weight 40 44.5.3Gel Time, min Preproduction Value 20% 4.5.4Resin Flow Preproduction Value 20% 4.5.5Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3834A SAE AMS 3834A- 4 -3.4.2 Cured Laminate: S
16、hall conform to the following requirements; tests shall be performed at 25 C 3 (77 F 5) in accordance with specified test methods on specimens cut from test laminates prepared as in 4.5.1. Specimens to be tested under wet conditions shall be immersed in boiling distilled water for not less than 2 ho
17、ur, cooled by immersion in water at room temperature, and tested within 2 hours. Property values specified are the minimum average for 4 determinations per test; no individual value shall be less than 90% of the minimum average value specified.3.4.2.1 Tensile Strength ASTM D 638Dry 60,000 psi (415 M
18、Pa)Wet 57,000 psi (395 MPa)3.4.2.2 Compressive Strength ASTM D 695Dry 48,000 psi (330 MPa)Wet 41,000 psi (285 MPa)3.4.2.3 Compressive Modulus ASTM D 695Dry 3,450,000 psi (240 GPa)Wet 3,000,000 psi (205 GPa)3.4.2.4 Flexural Strength ASTM D 790Dry 70,000 psi (485 MPa)Wet 63,000 psi (435 MPa)3.4.2.5 Fl
19、exural Modulus ASTM D 790Dry 3,250,000 psi (225 GPa)Wet 3,000,000 psi (205 GPa)3.4.2.6 Interlaminar Shear Strength ASTM D 2344Dry 1,900 psi ( 15 MPa)Wet 1,800 psi ( 10 MPa)3.4.2.7 Flame Resistance (See 8.2)3.4.2.7.1 Vertical Test, 60 Second Ignition: ASTM F 501Time to Extinguish after Flame Removal,
20、 max Average IndividualBurn Length, max 5.0 seconds 6.0 secondsDrip Flaming Time, max 6.0 inches 7.2 inches(150 mm) (180 mm)3.0 seconds 3.6 secondsCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 38
21、34A SAE AMS 3834A- 5 -3.4.2.7.2 Penetration Flame Test: 4.5.6Average IndividualTime of Extinguish after Flame Removal, 15 seconds 18 secondsTime of Afterglow, max 10 seconds 12 secondsPenetration (complete) of Laminate None None3.5 Quality: Cloth, as received by purchaser, shall be uniform in qualit
22、y and condition, clean, and free from foreign materials and from internal and external imperfections detrimental to usage of the cloth.4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for Inspection: The vendor of cloth shall supply all samples for vendors tests and shall be responsible for perfo
23、rming all required tests. Results of such tests shall be reported to the purchaser as required by 4.6. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the cloth conforms to the requirements of this specification.4.2 Classification of Tes
24、ts: 4.2.1 Acceptance Tests: Tests to determine conformance to requirements for properties of uncured impregnated product (3.4.1) and to tensile strength (3.4.2.1), flexural strength (3.4.2.4), interlaminar shear strength (3.4.2.6), and flame resistance (3.4.2.7.1. and 3.4.2.7.2) of cured laminates a
25、re classified as acceptance tests and shall be performed on each lot.4.2.2 Preproduction Tests: Tests to determine conformance to all technical requirements of this specification are classified as preproduction tests and shall be performed prior to or on the initial shipment of cloth to a purchaser,
26、 when a change in material or processing, or both, requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required.4.2.2.1 For direct U.S. Military procurement, substantiating test data and, when requested, preproduction test material shall be submitted to the cognizant
27、 agency as directed by the procuring activity, the contracting officer, or the request for procurement.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3834A SAE AMS 3834A- 6 -4.3 Sampling: Shall be
28、 as follows:4.3.1 For Acceptance Tests: 4.3.1.1 Frequency of Sampling: The vendor shall sample the cloth at random according to the following schedule:Volatiles: Each rollResin Solids: Each rollGel Time: Each rollResin Flow: Each rollTensile Strength: Lot basisFlexural Strength: Lot basisInterlamina
29、r Shear Strength: Lot basisFlame Resistance: Lot basis4.3.1.2 Each roll of cloth offered for acceptance shall not exceed 250 yd (230 m) in length.4.3.1.3 A lot shall be all cloth treated at one time without changes in treater settings using a single batch of resin and reinforcement and presented for
30、 vendors inspection at one time. An inspection lot shall not exceed 2000 yd (1830 m). A lot may be packaged in smaller quantities under the basic lot approval lot identification is maintained.4.3.1.4 From the test laminates prepared as in 4.5.1 four specimens shall be taken, with the length of each
31、specimen parallel to the warp, for each requirement for properties of the cured product.4.3.2 For Preproduction Tests: As agreed upon by purchaser and vendor.4.4 Approval: 4.4.1 Sample cloth shall be approved by purchaser before cloth for production use is supplied, unless such approval be waived by
32、 purchaser. Results of tests on production cloth shall be essentially equivalent to those on the approved sample.4.4.2 Vendor shall use ingredients, manufacturing procedures, processes, and methods of inspection on production cloth which are essentially the same as those used on the approved sample
33、cloth. If necessary to make any change in ingredients, in type of equipment for processing, or in manufacturing procedures, vendor shall submit for reapproval a statement of the proposed changes in material or processing, or both, and, when requested, sample cloth. Production cloth made by the revis
34、ed procedure, shall not be shipped prior to receipt of reapproval.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3834A SAE AMS 3834A- 7 -4.5 Test Methods: 4.5.1 Preparation of Test Laminates: All
35、test laminates shall be layed up with the warp parallel and unnested so that the satin shafts of the warp always face the top of the layup and shall be cured in accordance with resin manufactuers recommendation. Laminates from which tensile specimens are cut shall be composed of eight plies and shal
36、l be not less than 14 inches (350 mm) in the warp direction. Laminates from which test specimens for compressive strength, compressive modulus, flexural strength, flexural modulus, and shear strength are cut shall be composed of twelve plies and shall be not less than 12 inches (300 mm) square. Lami
37、nates from which test specimens for flame resistance are cut shall be composed of two plies and shall be not less than 12 inches (300 mm) square.4.5.2 Volatile Content: Shall be determined in accordance with ASTM D 3530 at Temperature A, 120 C (250 F).4.5.3 Resin Content: Shall be determined in acco
38、rdance with ASTM D 2584, using 620 C 25(1150 F 50).4.5.4 Gel Time: Cut sufficient 2 x 2 inch (50 x 50 mm) pieces across the role width to make a sample approximately 0.020 inch (0.50 mm) thick. Place the sample between sheets of suitable film and insert between the platens of a press which has been
39、stabilized at 120 C 5 (250 F 9). Apply sufficient pressure to form a bead of resin around the sample. Timing shall begin as soon as pressure is applied. The resin bead shall be probed at intervals with a wire. Gelling will be preceded by the appearance, during probing, of long strands of resin. Prob
40、ing shall be continued until these long strands of resin no longer occur; the elapsed time shall be recorded as gel time.4.5.5 Resin Flow: Shall be determined in accordance with ASTM D 3531, using a platen press preheated to 120 C 3 (250 F 5) and a pressure of 15 psig 1 (103 kPag 7) holding at heat
41、and pressure for 15 minutes 5.4.5.5.1 Penetration Flame Test: Specimens shall be supported at 45 deg to horizontal by clamping in a metal frame such that an area 8 x 8 inches (200 x 200 mm) is exposed. A 3/8 inch (9.5 mm) diameter Bunsen or Tirrill burner shall rest upon a horizontal surface. The bu
42、rner shall be adjusted for no air intake, giving a yellow tipped, 1-1/2 inches (38 mm) high flame which shall be applied to the center of the specimen for 30 seconds with 1/3 of the flame in contact with the specimen. Report the time to extinguish and the time to stop glowing after removal of the fl
43、ame for each specimen.4.6 Reports: 4.6.1 The vendor of cloth shall furnish with each shipment three copies of a report showing the results of tests to determine conformance to the acceptance test requirements and stating that the cloth conforms to the other technical requirements of this specificati
44、on. This report shall include the purchase order number, lot number, AMS 3834, vendors material designation, value to be reported, and quantity.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3834A
45、 SAE AMS 3834A- 8 -4.6.1.1 A material safety data sheet conforming to AMS 2825, or equivalent, shall be supplied to each purchaser prior to, or concurrent with, the report of preproduction test results or if preproduction testing be waived by purchaser concurrent with the first shipment of cloth for
46、 production use. Each request for modification of cloth formulation shall be accompanied by a revised data sheet for the proposed formulation.4.6.1.2 The vendor of finished or semi-finished parts shall furnish with each shipment three copies of a report showing the purchase order number, AMS 3834, c
47、ontractor or other direct supplier or cloth, suppliers material designation, part number, and quantity. When cloth for making parts is produced or purchased by the parts vendor, that vendor shall inspect each lot of cloth to determine conformance to the requirements of this specification and shall i
48、nclude in the report either a statement that the cloth conforms or copies of laboratory reports showing the results of tests to determine conformance.4.7 Resampling and Retesting: If any specimen used in the above tests fails to meet the specified requirements, disposition of the cloth may be based
49、on the results of testing three additional specimens, cut from the same panel or newly-prepared panel, for each original nonconforming specimen. Failure of any retest specimen to meet the specified requirements shall be cause for rejection of the cloth represented and no additional testing shall be permitted. Results of all tests shall be reported.5. PREPARATION FOR DELIVERY: 5.1 Identification: 5.1.1 Each roll of cloth shal
