Downloaded from https://www.everyspec.com tapter I~ INTROD UCTICN 14. PURPOSE AND SCOPE 'TABLE 1-1. The information presented in this hand- PRlCli(zL y. O k-mJ i book has been selected to convey ,an appre- ciation of the problens -whicai face the missile sLructural design 4pecialist and to provide a ten,.th oflat plate a basis Vir understanding the considexations A Cross-sectinal area -which leal to the final sttuctural coafigura- Radiatiug :area, surface area and ion.
Since a complete o'itline ,of the theory area normal to heat flow in and a-ractice of tructm'al lesign.and analysis radiation, convection and con- can(, be included in a single volume, the duction modes of heat trans- more elementary coniderations have been fer, resp-ctively omitted. It is a.sumed that the reader has b Width of-flat plate a technical background .and a reasonable Distance to -extreme fibers from knowledge of the fundamentals of the neutral plane in a pla'e strength of materials and structural princi- B Brinell hardness pes.
However, the 'book has been designed Constant, creep laws for the use of graduate engineers -ixth little Btu British thermal unit or no direct experience in this field -ather c Thermal capacity ) than for the experienced structural design C Distance from neutral axis to ex- - engineer or structural analyst. treme fiber Some of the problems facing the ballistic Constant, creeup laws missile structual design engineer are out- °C Temperature, Centigrade scale lined in this introductory chapter.
In Chap- D Diameter ter 2, Properties of Materials, elementary and E Internal energy basic considerations in the behavior of ma- Young's Modulus terials are introduced, mechanical, creep and E, Tangent modulus thermal properties are discussed, and data E, Secant modulus on physical properties are presented. Chap- Em, Effective modulus ter 3, Stress Analysis, gives formulas of F Temperature, Fahrenheit scale stress and strain for basic structural ele- F1. Compressive yield stress ments under selected lo-ds and boundary Q Shear modulus conditions.
Preliminary stress calculations GC Torsional rigidity can be made by the use of the information h Heat transfer coefficient presented in these two chapters. In the final Beam deptht chapter, Design C(.nsiderations, some of the Shell or plate thickness problem- facing the ballistic missile design I Moment of inertia engineer are presented and various possible k Thermal conductivity solutions are discussed. k j , k 2 . . . Constants, creep laws The principal notation used in this volume K Constant "s shown in Table 1-1. L Lngdn. This volume was w.ritsen by S. V.Nardo and N. J. n Constint, creep laws .,off, Polytechnic Institute of Brooklyn, Brooklyn, M Bending moment N. Y.. and edited by C. D.
Fitz, Vitro Laboratories, n Constant, creep laws West Orange, N. J. N Numbei of stress cycles