Aeronautical Design Standard (ADS) Handbook- Air Vehicle Materials and Processes

Keywords aeronautical design standard air vehicle materials air vehicle processes

3.1 Introduction
The following chapter provides general guidelines on materials selection and issues which should be considered in the design and construction of Army aircraft.

3.2 Materials and processes
All materials and material processes utilized in the construction of the aircraft should be in accordance with Chapter 2 of AMCP 706-202 an ADS-5 I-HDBK. Raw materials, in mill-product form, should be specified and produced on the basis of appropriate Government, contractor, or industrial/commercial specifications.

3.3 Materials properties
Properties of materials for design purposes should be obtained from MIL-HDBK-5, MIL-HDBK-17, or from appropriate contractor or industrial/commercial sources. Allowable properties based on static and fatigue test data other than handbook data may be used; properties other than those contained in the aforementioned handbooks should be substantiated and analyzed in accordance with procedures used for corresponding data in the appropriate handbook. Where it is necessary to develop data for materials, the test materials and processes should be those intended for use in production aircraft and should represent a minimum of three batches of material. Minimum properties obtained from the aforementioned sources should be used for design purposes. “A” values should be used in the design of structural components. “B” values can be used for all crash conditions, floor loading conditions, fail safe or redundant structures which are designed to carry full limit loads after failure of one member, and structure the failure of which would have no safety of flight implications. Where only “S” values exist, the use of such values should be quantitatively justified. For substantiation of structural integrity by analytical calculations, the nominal gage of materials should be the average gage between tolerances.

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1 . This Army Aeronautical Design Standard handbook is approved for use by the United States Army Aviation and Troop Command and is available for public release; distribution unlimited.
2. This handbook combines and updates the contents of the former ADS-13 and ADS-35. Requirements from those documents have been revised to become guidelines. These guidelines are based on lessons learned in the effective use and processing of metallic, nonmetallic, and cor+ooite nxt~rx+u i9r Army aircraft applications.
3. This handbook is for guidance only. This handbook cannot be cited as a requirement. If it is, the contractor does not have to comply.
4 . Any beneficial comments (recommendations, corrections, additions, or deletions) which may be of use in improving this document should be addressed to: Commander, US Army Aviation and Troop Command, ATTN: AMSAT-R-E, 4300 Goodfellow Boulevard, St. Louis, Missouri 63 1204798.

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