Elasticity and stability of thin-walled structures

Elasticity and stability of thin-walled structures

The purpose of education is to recognize fundamental terms of the range of elastic deformability and stability of some structure elements which could be used as airframe parts. The forces acting on those elements are assumed to come from steady or unsteady aircraft airload. Achieving the goal should result from application and mastering the knowledge of such problems like: statics and dynamics of thin-walled structures, airload effect on strength and deformation, aeroelastic phenomena endangering the safety of construction, loss of stability of typical structural elements, forms of local loss of stability in complicated aircraft structures.

Lectures:

1. Content topics: Introduction to the theory of elasticity - the basic concepts and theorems /2h.

2. Rod structures – simple rods, frames and trusses. Buckling of bars and frames – types of buckling due to the boundary conditions /2h.

3. Statics of thin-walled components - thin rods, discs and plates /2h.

4. Stability of plates and shells. Nonlinear equations of balance for beams, plates and shells /2h.

5. Dynamic instability of the airframe structure - classical flutter of aircraft. Dangerous phenomena of static aeroelasticity /2h.

Exercises:

1. Learning and training effects: Knowledge of mathematical rules in the area of modeling and analysis of aeroelastic and structure stability phenomena concerning aircraft structures, ability of solving differential equations describing the analyzed problems /4h.

2. Knowledge of hazard identification and operational safety management in the context of the prediction of unsafe conditions resulting from the loss of stability of the structure /4h.

3. Knowledge of designing and manufacturing airframe parts and the impact of design parameters on the properties determining the stability and elasticity of the structure. Ability to determine the typical parameters and aeroelastic characteristics of the analyzed aircraft structure /2h.

Laboratories:

1. Ability to formulate and use dedicated analytical, simulation and experimental tools in validation aeroelasticity/ 6h.

2. Ability to formulate and use dedicated analytical, simulation and stability criteria for operated structures and in the context of the safety of new-designed solutions /4h.

Basic:

1. EDS, UG/Open GRIP for CAD/CAM/CAE System, Electronic Data Systems, 1997.

2. Ito Y., Modular Design for Machine Tools, Mc Graw-Hill, 2008.

3. Daniel Raymer, Aircraft Design: A Conceptual Approach, 2008.

4. Megson T. H. G., Aircraft Structural Analysis, ELSEVIER, 2010.

Additional Literature

Journal articles: Aerospace Science and Engineering, Materials.

D_W03 Knowledge regarding methodology of scientific research in CAD science and related subjects (for example CAE, CAM) .D_U01 He/she has got skills connected with methodology of research in Mechanics sciences, especially regarding new design concept and technologies in producing a good aircraft design.

D_U08 He/she can define and solve new tasks and problems connected with control design process leading to its development and applications.

D_U09 He/she can properly teach using advanced training methods.

D_K04 He/she understands the necessity to inform the society about the achievements of science and technology.

The exam is conducted on the basis of passing the effects D_W03 of knowledge, practical skills and social competences.

Exercises are verified by checking the skills for D_U01 to D_U07.

Laboratories are classified on the basis of elements made in the CAD / CAM / CAE system based on the knowledge of D_W01 to D_W03 and skills in the field of D_U01 to D_U07 and social competences D_K01 to D_K02.

Not expected.