Information about the module
In the module "Lightweight Structures", students gain in-depth knowledge of lightweight structures. Special consideration is given to phenomena of force introduction and the stability of thin-walled structures. A first insight into the functioning and calculation of diaphragm cylinder shells is given.
General data about the module
| Study program |
M.Sc. Aerospace engineering |
| Module number | 1068 |
| Trimester | Spring trimester (2nd Master trimester) |
| ECTS | 5 |
| Work load |
150h total, thereof 48h presence time 102h self-study |
| Typ/TWS |
2 TWS lecture 2 TWS excercise |
Qualification goals
- Students will be familiar with the main mechanisms involved in the introduction of concentrated forces into thin-walled structures. They are able to determine the stresses that occur and assess their effects on practical problems.
- Students acquire the ability to classify stability problems of thin-walled rod-like structures. They can determine the stability-critical loads for simple thin-walled structures.
- Students will have a basic understanding of the action of diaphragm circular cylinder shells without and with circumferential stiffeners (ribs).
Content
The module is divided into the following sections:
- Load introduction/diversion, three-belt disc, analytical solution, shear-lag theory
- Stability of lightweight structures
- Bar-spring systems, branching problems, breakdown problems, systems with multiple degrees of freedom, combined stresses (interaction formulas)
- Elastic structures, compression loaded beam with pre-deformation, beam approximation methods, elastically bedded beam, sandwich buckling, flexural torsional buckling, tilting, plate buckling, partial shell instabilities, buckling of circular cylindrical shells, concept of midbearing width and tension field
- Statics of circular cylindrical shells, transfer matrix of diaphragm shell, circumferentially bending stiff circular cylindrical shell, tension matrix
