Page 8 - Aircraft Stuctures for Engineering Student

Contents vii

6.9 Local instability 174
6.10 Instability of stiffened panels 175
6.11 Failure stress in plates and stiffened panels i77
6.12 Flexural-torsional buckling of thin-walled columns 180
6.13 Tension field beams 188
References 197
Problems 197

Part I1 Aircraft Structures 209
7 Principles of stressed skin construction 211
7.1 Materials of aircraft construction 21 1
7.2 Loads on structural components 220
7.3 Function of structural components 223
7.4 Fabrication of structural components 225
Problems 232

8 Airworthiness and airframe loads 233
8.1 Factors of safety - flight envelope 233
8.2 Load factor determination 235
8.3 Aircraft inertia loads 238
8.4 Symmetric manoeuvre loads 244
8.5 Normal accelerations associated with various types of manoeuvre 248
8.6 Gust loads 25 1
8.7 Fatigue 257
References 27 1
Further reading 272
Problems 272

9 Bending, shear and torsion of open and closed, thin-walled beams 276
9.1 Bending of open and closed section beams 276
9.2 General stress, strain and displacement relationships for open and
single cell closed section thin-walled beams 29 1
9.3 Shear of open section beams 295
9.4 Shear of closed section beams 300
9.5 Torsion of closed section beams 307
9.6 Torsion of open section beams 316
9.7 Analysis of combined open and closed sections 322
9.8 Structural idealization 327
9.9 Effect of idealization on the analysis of open and closed
section beams 331
9.10 Deflection of open and closed section beams 342
Problems 345

10 Stress analysis of aircraft components 362
10.1 Tapered beams 3 62
10.2 Fuselages 3 74