Page 9 - Aircraft Stuctures for Engineering Student

viii Contents

10.3 Wings 380
10.4 Fuselage frames and wing ribs 406
10.5 Cut-outs in wings and fuselages 415
10.6 Laminated composite structures 425
Reference 432
Further reading 432
Problems 432

11 Structural constraint 443
1 1.1 General aspects of structural constraint 443
11.2 Shear stress distribution at a built-in end of a closed section beam 445
1 1.3 Thin-walled rectangular section beam subjected to torsion 449
11.4 Shear lag 455
11.5 Constraint of open section beams 465
References 485
Problems 486
12 Matrix methods of structural analysis 494
12.1 Notation 495
12.2 Stiffness matrix for an elastic spring 496
12.3 Stiffness matrix for two elastic springs in line 497
12.4 Matrix analysis of pin-jointed frameworks 500
12.5 Application to statically indeterminate frameworks 507
12.6 Matrix analysis of space frames 507
12.7 Stiffness matrix for a uniform beam 509
12.8 Finite element method for continuum structures 516
References 533
Further reading 533
Problems 533

13 Elementary aeroelasticity 540
13.1 Load distribution and divergence 54 1
13.2 Control effectiveness and reversal 546
13.3 Structural vibration 55 1
13.4 Introduction to ‘flutter’ 568
References 576
Problems 577

Index 582