Da Cunha F.R.S. Robustness-based design strategy for thin-walled composite structures exploiting the postbuckling regime: Diss. … Dr.-Ing. F.R.S. da Cunha / Deutsches Zentrum für Luft- und Raumfahrt, Institut für Faserverbundleichtbau und Adaptronik, Braunschweig. - Köln: DLR, 2014. - viii, 104 p.: ill. - (Forschungsbericht; 2014-34). - Bibliogr.: p.100-104. - ISSN 1434-8454  Место хранения:   02 | Отделение ГПНТБ СО РАН | Новосибирск

Оглавление / Contents

LIST OF FIGURES ............................................... III LIST OF TABLES ................................................. VI NOMENCLATURE ................................................. VIII 1 INTRODUCTION ................................................. 1 2 HYPOTHESIS ................................................... 3 2.1 Scope of the Thesis ..................................... 3 2.2 Outline of the Thesis ................................... 4 3 AIRCRAFT LIFE CYCLE .......................................... 5 3.1 Life Cycle Phases ....................................... 5 3.2 Airframe Sizing Process ................................. 8 3.3 Simulation Methods in the Sizing Process ............... 12 3.4 Summary and Conclusions ................................ 14 4 STATE OF THE ART METHODS RELATED TO STRUCTURAL ROBUSTNESS ... 15 4.1 Design Philosophies .................................... 15 4.2 Nondeterministic approaches ............................ 22 4.3 Composite Structures ................................... 24 4.4 Buckling and Postbuckling .............................. 29 4.5 Robustness ............................................. 36 4.6 Summary and Conclusions ................................ 41 5 NOVEL STRUCTURAL ROBUSTNESS DESIGN STRATEGY ................. 43 5.1 Novel Energy-Based Structural Robustness Measures ...... 43 5.2 Structural Robustness Design Strategy .................. 45 5.3 Structural Robustness Design Strategy in the Context of the Airframe Sizing Process ......................... 50 5.4 Summary and Conclusions ................................ 51 6 STRUCTURAL ROBUSTNESS ASSESSMENTS OF UNSTIFFENED PLATES ..... 52 6.1 Finite Element Model ................................... 52 6.2 Deterministic Assessment ............................... 54 6.3 Probabilistic Assessment ............................... 57 6.4 Deterministic versus Probabilistic Results ............. 60 6.5 Summary and Conclusions ................................ 62 7 STRUCTURAL ROBUSTNESS ASSESSMENTS OF STIFFENED SHELLS ....... 63 7.1 Assessment of Tested Panels ............................ 63 7.2 Finite Element Model ................................... 65 7.3 Deterministic Assessment ............................... 70 7.4 Probabilistic Assessment ............................... 78 7.5 Summary and Conclusions ................................ 85 8 SUMMARY AND OUTLOOK ......................................... 87 APPENDIX A STATISTICAL TERMS .................................. 90 A.1 Probability of Failure and Reliability ................. 90 A.2 Random Numbers and Correlation ......................... 91 APPENDIX В MESH OF STIFFENED SHELLS ........................... 95 APPENDIX С SAMPLE RESULTS OF STIFFENED SHELLS ................. 96 BIBLIOGRAPHY .................................................. 100