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 entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, 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 2003 SAE InternationalAll rights reserved. No part of this publication may be
3、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: 724-776-4970 (outside USA)Fax: 724-
4、776-0790Email: custsvcsae.orgSAE WEB ADDRESS: http:/www.sae.orgFOAM, RIGID, STRUCTURAL, CLOSED CELLThis document has been taken directly from U.S. Military Specification MIL-PRF-46194A, Amendment 1, and contains only minor editorial and format changes required to bring it into conformance with the p
5、ublishing requirements of SAE technical standards. The initial release of this document is intended to replace MIL-PRF-46194A, Amendment 1. Any part numbers established by the original specification remain unchanged.The original Military Specification was adopted as an SAE standard under the provisi
6、ons of the SAE Technical Standards Board (TSB) Rules and Regulations (TSB 001) pertaining to accelerated adoption of government specifications and standards. TSB rules provide for (a) the publication of portions of unrevised government specifications and standards without consensus voting at the SAE
7、 Committee level, and (b) the use of the existing government specification or standard format.Under Department of Defense policies and procedures, any qualification requirements and associated qualified products lists are mandatory for DOD contracts. Any requirement relating to qualified products li
8、sts (QPLs) has not been adopted by SAE and is not part of this SAE technical document.AEROSPACE MATERIAL SPECIFICATIONAMS-PRF-46194AIssued FEB 2003Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS-PR
9、F-46194A SAE AMS-PRF-46194A- 2 -1. SCOPE:1.1 Scope: This specification covers rigid, structural, closed cell foam (see 6.1).1.2 Classification: The foam to be of the following types and classes:Type IFor processing up to temperatures of 250F (121C)Class 1 2.0 lbm/ ft3(32.0 kg/m3) density, nominalCla
10、ss 2 3.2 lbm/ ft3(51.3 kg/m3) density, nominalClass 3 4.7 lbm/ ft3(75.3 kg/m3) density, nominalType II For processing up to temperatures of 350F (177C) after post-curing (see 6.4)Class 2 3.2 lbm/ ft3(51.3 kg/m3) density, nominalClass 3 4.7 lbm/ ft3(75.3 kg/m3) density, nominalClass 4 6.9 lbm/ ft3(11
11、0.5 kg/m3) density, nominalClass 5 12.8 lbm/ ft3(205.0 kg/m3) density, nominalClass 6 18.7 lbm/ ft3(299.5 kg/m3) density, nominal2. 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
12、 in other sections of this specification or recommended for additional 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 specifi
13、cation, whether or not they are listed.2.2 Non-Government publications: The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the solicita
14、tion. 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).Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AM
15、S-PRF-46194A SAE AMS-PRF-46194A- 3 -AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)ASTM C273 - Standard Test Method for Shear Properties of Sandwich Core MaterialsASTM D638/D638M - Standard Test Method for Tensile Properties of PlasticsASTM D910 - Standard Specification for Aviation GasolinesASTM
16、D1621 - Standard Test Method for Compressive Properties of Rigid Cellular PlasticsASTM D1622 - Standard Test Method for Apparent Density of Rigid Cellular Plastics(Application for copies should be addressed to the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken,
17、PA 19428).SOCIETY OF AUTOMOTIVE ENGINEERS (SAE)AS 1241 - Fire Resistant Phosphate Ester Hydraulic Fluid for Aircraft(Application for copies should be addressed to Aerospace Material Specifications, 400 Commonwealth Drive, Warrendale, PA 15096).2.3 Order of precedence: In the event of a conflict betw
18、een the text of this document and the references cited herein, the text of this document takes precedence. 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 in the contract or
19、 purchase order, a sample shall be subjected to first article inspection (see 4.2.1).3.2 Recycled, recovered, or environmentally preferable materials: Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided the material meets or exceeds all
20、 specified requirements and promotes economically advantageous life cycle costs.3.3 Material: The material shall be a dimensionally stable, closed cell, rigid foam. The foam material shall be homogenous throughout. The cells shall be of approximately the same size, without large accumulations of une
21、xpanded resin, or other inclusions. The foam shall be free of cracks, surface irregularities, handling damage, and contaminants. The foam shall conform to the dimensional requirements of the purchase order.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproductio
22、n or networking permitted without license from IHS-,-AMS-PRF-46194A SAE AMS-PRF-46194A- 4 -3.4 Thermal stability: Type I expanded foam shall maintain dimensional stability at temperatures up to 250F (121C). Type II foam shall maintain dimensional stability at temperatures up to 350F (177C).3.5 Marki
23、ng: Each individual sheet shall be permanently marked in one corner with the following information:a) Material specification number, revision letterb) Type and classc) Lot number and batch numberd) Date of manufacturee) Manufacturers product designation3.6 Properties: Unless otherwise specified, the
24、 physical and mechanical properties of the foam shall be as specified herein when tested in accordance with the test methods listed in Table V.3.7 Physical properties: The density range and maximal water absorption of the foam shall be as specified in Table I.3.8 Fluid resistance: The foam shall be
25、resistant to the fluids listed in Table II. The compressive strength of the foam at 73.4 3.6F (23.0 2.0C) shall remain above the minimal values specified in 3.3.3 when immersed in the fluids for the exposure times and temperatures as specified in Table II.3.9 Mechanical properties: 3.9.1 Type I foam
26、: The minimal mechanical properties of type I foam shall be as specified in Table III.3.9.2 Type II foam: The minimal mechanical properties of type II foam shall be as specified in Table IV.4. VERIFICATION: 4.1 Verification alternatives: Alternative test methods, techniques, or equipment, including
27、the application of statistical process control, tool control, or cost effective sampling procedures may be proposed by the contractor. Acceptable alternative verification approaches shall be identified in the contract.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo
28、 reproduction or networking permitted without license from IHS-,-AMS-PRF-46194A SAE AMS-PRF-46194A- 5 -4.2 Classification of inspection: The examination and testing of the foam material shall be classified as follows:a) First article inspection (see 4.2.1)b) Conformance inspection (see 4.2.2)4.2.1 F
29、irst article inspection: 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
30、 the purchase order (see 6.2). This inspection shall consist of the tests specified in table V.4.2.2 Conformance inspection: Conformance inspection for acceptance of rigid, structural, closed cell foam shall meet all the provisions specified by the procuring activity, the contract or the purchase or
31、der (see 6.2).4.3 Lot size: Lot size shall consist of all foam material of the same density produced from one batch during a single production run.4.3 Sampling: Unless otherwise specified, at least one sample sheet which is representative of each lot (4.3) shall be selected at random for conformance
32、 testing. When material is supplied in thicknesses of less than 1 inch (2.5 cm), the supplier shall also furnish material from the same lot, not less than 1 inch (2.5 cm) thick for conformance inspection.4.5 Water absorption test: Water absorption shall be determined on five specimens selected at ra
33、ndom from each density submitted for testing. Each specimen shall be 2 inches by 2 inches by 1 inch thick (5 x 5 x 2.5 cm). The specimens shall not be sealed or protected with any coating which would inhibit moisture absorption. After drying as specified in 6.3, the specimens shall be allowed to coo
34、l to room temperature (73.4 3.6F) (23.0 2.0C) in an environmentally controlled (50 5% RH) room for 2 hours, and then shall be weighed. The specimens shall then be placed into an environmental chamber at a relative humidity of 85 2 percent and a temperature of 160 5F (71 3C).Specimens shall be remove
35、d from the chamber periodically (but at least once a week), allowed to cool to room temperature, then reweighed to determine weight after exposure. The above procedure shall be repeated until the equilibrium moisture level (saturation) is attained. Equilibrium shall be defined as two consecutive wee
36、kly measurements indicating a moisture gain of less than 0.05 percent. Except for reweighing, wet conditioning shall not be interrupted. Calculate moisture absorption for each specimen as: weight (percent) absorbed = (weight wet specimen - weight dry specimen) / (weight dry specimen) x 100. Calculat
37、e the average moisture absorbed.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS-PRF-46194A SAE AMS-PRF-46194A- 6 -4.6 Noncompliance: 4.6.1 Rejection: Unless otherwise specified where one or more te
38、st specimens fail to meet the requirements of the specification, the lot represented by the specimen or specimens shall be subject to rejection.4.6.2 Retest: When a sampling plan is not provided or approved by the procuring agency, where there is evidence that indicates that the specimen was not rep
39、resentative of the lot of material, and when the contract does not otherwise specify, at least two specimens shall be selected to replace each test specimen which failed. All specimens so selected for retest shall meet the requirements of the specification or the lot shall be subject to rejection.4.
40、7 Deleted per Amendment 1.5. PACKAGING: 5.1 Packaging: For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When actual packaging of material is to be performed by DoD personnel, these personnel need to contact the responsible packaging activ
41、ity to ascertain requisite packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activity within the Military Department of Defense Agency, or within the Military Departments System Command. Packaging data retrieval is available from the managing Mil
42、itary Departments or Defense Agencys automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.6. NOTES: (This section contains information of a general or explanatory nature which may be helpful, but is not mandatory.)6.1 Intended use: The foams which are speci
43、fied in this document are rigid, closed cell materials comparable in density to some types of honeycomb core. This material may be a viable candidate for structural aerospace applications whenever a core or filler is needed and in nonstructural applications including formed configurations. Polymetha
44、crylimide (PMI) foam has been used to comply with the requirements of this specification.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS-PRF-46194A SAE AMS-PRF-46194A- 7 -6.2 Acquisition requiremen
45、ts: Acquisition documents should specify the following:a. Title, number and date of this specificationb. Type and class of material (see 1.2)c. Issue of DoDISS to be cited in the solicitation, and if required, the specific issue of individual documents referenced (see 2.2).d. When first article is r
46、equired (see 3.1).e. Dimensions in SI and English units.f. Sampling plan, if other than specified in 4.4g. Packaging requirements (see 5.1).6.3 Procedure for drying type I and type II foams: Dry foam sections and panels in an air circulating oven at 250 10F (121 5C) for a minimum of 2 hours. Do not
47、allow panels to come in contact with other panels in the oven (do not stack panels). Separate each panel from the closest panel by not less than one inch (2.5 cm). Arrange panels parallel to the direction of air flow. Do not place panels directly on the bottom of the oven, or on any other piece of n
48、onperforated metal (which could restrict air flow). Place a piece of perforated metal or heavy metal screen atop the panel to prevent warpage during the drying cycle.6.4 Procedure for heat treating type II foams: Prior to heat treating, dry the material in accordance with 6.3. Heat treat the materia
49、l immediately after the drying cycle for the following times and temperatures: 48 hours 350 10F (177 5C) for class 2 and 3, 20 hours 320 10F (160 5C) followed by 28 hours 350 10F (177 5C) for class 4 and 5, and 24 hours 350 10F (177 5C) for class 6. Do not allow panels to come in contact with other panels in the oven (do not stack panels), and separate each panel from the closest panel by not less than one
