Conference Proceeding
Refine
Year of publication
Document Type
- Conference Proceeding (61) (remove)
Keywords
- Finite-Elemente-Methode (11)
- Einspielen <Werkstoff> (6)
- shakedown analysis (6)
- Limit analysis (4)
- limit analysis (4)
- Shakedown (3)
- Shakedown analysis (3)
- Traglast (3)
- Bruchmechanik (2)
- Einspielanalyse (2)
- FEM (2)
- Ratcheting (2)
- Traglastanalyse (2)
- ratchetting (2)
- shakedown (2)
- Analytischer Zulaessigkeitsnachweis (1)
- Anastomose (1)
- Anastomosis (1)
- Biomechanics (1)
- Biomechanik (1)
- Biomedizinische Technik (1)
- Chance constrained programming (1)
- Druckbeanspruchung (1)
- Druckbehälter (1)
- Druckbelastung (1)
- Einspiel-Analyse (1)
- Elastodynamik (1)
- Evolution of damage (1)
- Exact Ilyushin yield surface (1)
- Extension fracture (1)
- Extension strain criterion (1)
- FEM-Programm (1)
- FEM-computation (1)
- Fehlerstellen (1)
- Festkörper (1)
- Finite element method (1)
- First Order Reliabiblity Method (1)
- First-order reliability method (1)
- LISA (1)
- Mohr–Coulomb criterion (1)
- Multi-dimensional wave propagation (1)
- Nichtlineare Gleichung (1)
- Nichtlineare Optimierung (1)
- Nichtlineare Welle (1)
- PFM (1)
- Random variable (1)
- Reliability of structures (1)
- Rohr (1)
- Rohrbruch (1)
- Sensitivity (1)
- Stahl (1)
- Stochastic programming (1)
- Technische Mechanik (1)
- Torsion (1)
- Torsionsbelastung (1)
- Tragfähigkeit (1)
- Wellen (1)
- Zug-Druck-Beanspruchung (1)
- Zug-Druck-Belastung (1)
- burst pressure (1)
- burst tests (1)
- design-by-analysis (1)
- finite element analysis (1)
- flaw (1)
- limit and shakedown analysis (1)
- limit load (1)
- linear kinematic hardening (1)
- load carrying capacity (1)
- load limit (1)
- lower bound theorem (1)
- material shakedown (1)
- mechanical waves (1)
- nonlinear kinematic hardening (1)
- nonlinear optimization (1)
- nonlinear solids (1)
- nonlinear tensor constitutive equation (1)
- pipes (1)
- plastic deformation (1)
- probabilistic fracture mechanics (1)
- reliability (1)
- second-order reliability method (1)
- tension–torsion loading (1)
- vessels (1)
Institute
- Fachbereich Medizintechnik und Technomathematik (61) (remove)
A new formulation to calculate the shakedown limit load of Kirchhoff plates under stochastic conditions of strength is developed. Direct structural reliability design by chance con-strained programming is based on the prescribed failure probabilities, which is an effective approach of stochastic programming if it can be formulated as an equivalent deterministic optimization problem. We restrict uncertainty to strength, the loading is still deterministic. A new formulation is derived in case of random strength with lognormal distribution. Upper bound and lower bound shakedown load factors are calculated simultaneously by a dual algorithm.
Direct methods comprising limit and shakedown analysis is a branch of computational mechanics. It plays a significant role in mechanical and civil engineering design. The concept of direct method aims to determinate the ultimate load bearing capacity of structures beyond the elastic range. For practical problems, the direct methods lead to nonlinear convex optimization problems with a large number of variables and onstraints. If strength and loading are random quantities, the problem of shakedown analysis is considered as stochastic programming. This paper presents a method so called chance constrained programming, an effective method of stochastic programming, to solve shakedown analysis problem under random condition of strength. In this our investigation, the loading is deterministic, the strength is distributed as normal or lognormal variables.
Summary: This paper presents a methodology to study and understand the mechanics of stapled anastomotic behaviors by combining empirical experimentation and finite element analysis. Performance of stapled anastomosis is studied in terms of leakage and numerical results which are compared to in vitro experiments performed on fresh porcine tissue. Results suggest that leaks occur between the tissue and staple legs penetrating through the tissue.
Proceedings of the International Conference on Material Theory and Nonlinear Dynamics. MatDyn. Hanoi, Vietnam, Sept. 24-26, 2007, 8 p. In this paper, a method is introduced to determine the limit load of general shells using the finite element method. The method is based on an upper bound limit and shakedown analysis with elastic-perfectly plastic material model. A non-linear constrained optimisation problem is solved by using Newton’s method in conjunction with a penalty method and the Lagrangean dual method. Numerical investigation of a pipe bend subjected to bending moments proves the effectiveness of the algorithm.