Refine
Year of publication
Document Type
- Article (132)
- Conference Proceeding (62)
- Part of a Book (13)
- Book (4)
- Lecture (3)
- Other (3)
- Report (2)
- Doctoral Thesis (1)
- Patent (1)
- Review (1)
Keywords
- Finite-Elemente-Methode (16)
- Einspielen <Werkstoff> (13)
- shakedown analysis (9)
- FEM (6)
- Limit analysis (6)
- Shakedown analysis (6)
- limit analysis (6)
- Einspielanalyse (4)
- Shakedown (4)
- Technische Mechanik (4)
- Traglast (4)
- Traglastanalyse (4)
- shakedown (4)
- ratchetting (3)
- Analytischer Zulaessigkeitsnachweis (2)
- Biocomposites (2)
- Bruchmechanik (2)
- Druckbeanspruchung (2)
- Druckbehälter (2)
- Druckbelastung (2)
- Einspiel-Analyse (2)
- Fehlerstellen (2)
- Natural fibres (2)
- Polymer-matrix composites (2)
- Ratcheting (2)
- Rohr (2)
- Rohrbruch (2)
- Stahl (2)
- Stress concentrations (2)
- burst pressure (2)
- burst tests (2)
- damage (2)
- flaw (2)
- limit load (2)
- load limit (2)
- pipes (2)
- tension–torsion loading (2)
- vessels (2)
- Alternating plasticity (1)
- Anastomose (1)
- Anastomosis (1)
- Anastomotic leakage (1)
- Arthosetherapie (1)
- Aufschlagversuch (1)
- Autolysis (1)
- Axialbelastung (1)
- Axially cracked pipe (1)
- Basis Reduktion (1)
- Basis reduction (1)
- Bicharakteristikenverfahren (1)
- Biomechanics (1)
- Biomechanik (1)
- Biomedizinische Technik (1)
- Bladder (1)
- Bone sawing (1)
- Cardiac myocytes (1)
- Cardiac tissue (1)
- CellDrum (1)
- Chance constrained programming (1)
- Collagen fibrils (1)
- Computational biomechanics (1)
- Connective tissues (1)
- Constitutive model (1)
- Convex optimization (1)
- Damage mechanics theory (1)
- Decomposition (1)
- Deformation (1)
- Design-by-analysis (1)
- Discontinuous fractures (1)
- Distorsion des oberen Sprunggelenks (1)
- Druckgeräte (1)
- Drug simulation (1)
- ES-FEM (1)
- Einspiel-Kriterium (1)
- Einspielen (1)
- Elastizität (1)
- Elastodynamik (1)
- Elastostatics (1)
- Electromechanical modeling (1)
- End-to-end colorectal anastomosis (1)
- Evolution of damage (1)
- Exact Ilyushin yield surface (1)
- Extension fracture (1)
- Extension strain criterion (1)
- Extracellular matrix (ECM) (1)
- FEM-Programm (1)
- FEM-computation (1)
- FS-FEM (1)
- Festkörper (1)
- Finite element analysis (1)
- Finite element analysis (FEA) (1)
- Finite element method (1)
- Finite element modelling (1)
- First Order Reliabiblity Method (1)
- First-order reliability method (1)
- Fließgrenze (1)
- Freeze–thaw process (1)
- Frequency adaption (1)
- Fußball (1)
- Global and local collapse (1)
- Gonarthrose (1)
- Grenzwertberechnung (1)
- Growth modelling (1)
- Heart tissue culture (1)
- Hodgkin–Huxley models (1)
- Homogenization (1)
- Induced pluripotent stem cells (1)
- Inotropic compounds (1)
- Ion channels (1)
- Kinematics (1)
- Kinetics (1)
- Kniegelenkarthrose (1)
- Knochen (1)
- Knochenbildung (1)
- Knochenchirugie (1)
- Knochendichte (1)
- LISA (1)
- Liver (1)
- MBST (1)
- Materialermüdung (1)
- Mechanical simulation (1)
- Mechanical stability (1)
- Mechanics (1)
- Mohr–Coulomb criterion (1)
- Multi-dimensional wave propagation (1)
- Multimode failure (1)
- Muscle fibers (1)
- Nichtlineare Gleichung (1)
- Nichtlineare Optimierung (1)
- Nichtlineare Welle (1)
- Non-linear optimization (1)
- Non-parallel fissures (1)
- PFM (1)
- Passive stretching (1)
- Pelvic floor dysfunction (1)
- Pelvic muscle (1)
- Pharmacology (1)
- Plastizität (1)
- Pressure loaded crack-face (1)
- Progressive plastic deformation (1)
- Random variable (1)
- Ratchetting (1)
- Reconstruction (1)
- Reliability analysis (1)
- Reliability of structures (1)
- S-FEM (1)
- Schienbeinschoner (1)
- Schwammknochen (1)
- Sensitivity (1)
- Shakedown criterion (1)
- Spleen (1)
- Sprunggelenkorthesen (1)
- Statics (1)
- Stochastic programming (1)
- Strukturanalyse (1)
- Surgical staplers (1)
- Tapered ends (1)
- Temperaturabhängigkeit (1)
- Torsion (1)
- Torsionsbelastung (1)
- Tragfähigkeit (1)
- Uniaxial compression test (1)
- Ureter (1)
- Variable height stapler design (1)
- Wellen (1)
- Wolff's Law (1)
- Wolffsches Gesetz (1)
- Zug-Druck Belastung (1)
- Zug-Druck-Beanspruchung (1)
- Zug-Druck-Belastung (1)
- alternierend Verformbarkeit (1)
- anaesthetic complications (1)
- anisotropy (1)
- ankle braces (1)
- ankle sprain (1)
- arthrosis therapy (1)
- biaxial tensile experiment (1)
- bicharacteristics (1)
- bone density (1)
- bone structure (1)
- cancellous bone (1)
- chance constrained programming (1)
- constitutive modeling (1)
- dental trauma (1)
- design-by-analysis (1)
- difficult airway (1)
- direct method (1)
- distorted element (1)
- double-lumen tube intubation (1)
- elastic solids (1)
- fatigue analyses (1)
- fibulare Bandruptur (1)
- finite element analysis (1)
- fortschreitende plastische Deformation (1)
- gonarthrosis (1)
- hiPS cardiomyocytes (1)
- hyperelastic (1)
- konvexe Optimierung (1)
- limit and shakedown analysis (1)
- linear kinematic hardening (1)
- load carrying capacity (1)
- lower bound theorem (1)
- material shakedown (1)
- mechanical waves (1)
- non-simplex S-FEM elements (1)
- nonlinear kinematic hardening (1)
- nonlinear optimization (1)
- nonlinear solids (1)
- nonlinear tensor constitutive equation (1)
- plastic deformation (1)
- probabilistic fracture mechanics (1)
- reliability (1)
- reliability analysis (1)
- reliability of structures (1)
- rupture of the fibular ligament (1)
- second-order reliability method (1)
- shakedown analyses (1)
- smooth muscle contraction (1)
- stochastic programming (1)
- strain energy function (1)
- thermal ratcheting (1)
- training simulator (1)
- videolaryngoscopy (1)
- virgin passive (1)
- virtual reality (1)
- viscoelasticity (1)
- yield stress (1)
Limit loads of circumferentially flawed pipes and cylindrical vessels under internal pressure
(2006)
Load bearing capacity of thin shell structures made of elastoplastic material by direct methods
(2008)
Shakedown analysis of two dimensional structures by an edge-based smoothed finite element method
(2010)
Upper and lower bound theorems of limit analyses have been presented in part I of the paper. Part II starts with the finite element discretization of these theorems and demonstrates how both can be combined in a primal–dual optimization problem. This recently proposed numerical method is used to guide the development of a new class of closed-form limit loads for circumferential defects, which show that only large defects contribute to plastic collapse with a rapid loss of strength with increasing crack sizes. The formulae are compared with primal–dual FEM limit analyses and with burst tests. Even closer predictions are obtained with iterative limit load solutions for the von Mises yield function and for the Tresca yield function. Pressure loading of the faces of interior cracks in thick pipes reduces the collapse load of circumferential defects more than for axial flaws. Axial defects have been treated in part I of the paper.
Suburethral slings as well as different meshes are widely used treating stress urinary incontinence and prolaps in women. With the development of MiniSlings and special meshes using less alloplastic material anchorage systems become more important to keep devices in place and to put some tension especially on the MiniSlings. To date, there are many different systems of MiniSlings of different companies on the market which differ in the structure of the used meshes and anchors. A new objective measurement method to compare different properties of MiniSling systems (mesh and anchor) is presented in this article. Ballistic gelatine acts as soft tissue surrogate. Significant differences in parameters like pull-out strength of anchors or shrinkage of meshes under loading conditions have been determined. The form and size of the anchors as well as the structural stability of the meshes are decisive for a proper integration. The tested anchorings sytems showed markedly different mechanical function at their respective load bearing capacity. As the stable fixation of the device in tissue is a prerequisite for a permanet reinforcement, the proposed test system permits further optimisation of anchor and mesh devices to improve the success of the surgical treatment
The impact of surgical staplers on tissues has been studied mostly in an empirical manner. In this paper, finite element method was used to clarify the mechanics of tissue stapling and associated phenomena. Various stapling modalities and several designs of circular staplers were investigated to evaluate the impact of the device on tissues and mechanical performance of the end-to-end colorectal anastomosis. Numerical simulations demonstrated that a single row of staples is not adequate to resist leakage due to non-linear buckling and opening of the tissue layers between two adjacent staples. Compared to the single staple row configuration, significant increase in stress experienced by the tissue at the inner staple rows was observed in two and three rows designs. On the other hand, adding second and/or third staple row had no effect on strain in the tissue inside the staples. Variable height design with higher staples in outer rows significantly reduced the stresses and strains in outer rows when compared to the same configuration with flat cartridge.