Refine
Year of publication
Institute
- Fachbereich Medizintechnik und Technomathematik (124) (remove)
Has Fulltext
- yes (124) (remove)
Language
- English (124) (remove)
Document Type
- Conference Proceeding (77)
- Article (45)
- Lecture (2)
Keywords
- Biosensor (25)
- Finite-Elemente-Methode (12)
- Einspielen <Werkstoff> (10)
- CAD (8)
- civil engineering (8)
- Bauingenieurwesen (7)
- FEM (6)
- Clusterion (5)
- shakedown analysis (5)
- Air purification (4)
- Hämoglobin (4)
- Limit analysis (4)
- Luftreiniger (4)
- Plasmacluster ion technology (4)
- Raumluft (4)
- Shakedown analysis (4)
- Einspielanalyse (3)
- Kohlenstofffaser (3)
- Lipopolysaccharide (3)
- Shakedown (3)
- Sonde (3)
- Technische Mechanik (3)
- Traglastanalyse (3)
- limit analysis (3)
- lipopolysaccharides (3)
- shakedown (3)
- Analytischer Zulaessigkeitsnachweis (2)
- Bruchmechanik (2)
- Capacitive field-effect sensor (2)
- Einspiel-Analyse (2)
- Eisschicht (2)
- Erythrozyt (2)
- Fibroblast (2)
- Label-free detection (2)
- Pflanzenphysiologie (2)
- Pflanzenscanner (2)
- Stickstoffmonoxid (2)
- Traglast (2)
- biosensor (2)
- biosensors (2)
- capacitive field-effect sensors (2)
- celldrum technology (2)
- limit load (2)
- nanostructured carbonized plant parts (2)
- nanostrukturierte carbonisierte Pflanzenteile (2)
- nitric oxide gas (2)
- plant scanner (2)
- ratchetting (2)
- 3-nitrofluoranthene (1)
- Adsorption (1)
- Alternating plasticity (1)
- Analysis (1)
- Anastomose (1)
- Anastomosis (1)
- Architectural design (1)
- Autofluoreszenzverfahren (1)
- Axialbelastung (1)
- Axially cracked pipe (1)
- BTEX compounds (1)
- Bacterial cellulose (1)
- Bakterien (1)
- Basis Reduktion (1)
- Basis reduction (1)
- Bicharakteristikenverfahren (1)
- Bio-Sensors (1)
- Bioabsorbable (1)
- Biomechanics (1)
- Biomechanik (1)
- Biomedizinische Technik (1)
- Biophoton (1)
- Bioreaktor (1)
- Biosensorik (1)
- Blitzschutz (1)
- Blutzellenlagerung (1)
- Bone quality and biomechanics (1)
- CAD ; (1)
- CO (1)
- Carbon sources (1)
- Cellulose nanostructure (1)
- Cement infiltration (1)
- Conducing polymer (1)
- Convex optimization (1)
- Cost-effectiveness (1)
- Culture media (1)
- Dattel (1)
- Deformation (1)
- Dekontamination (1)
- Design-by-analysis (1)
- Druckbeanspruchung (1)
- Druckbehälter (1)
- Druckbelastung (1)
- Druckgeräte (1)
- E. coli detection (1)
- ECT (1)
- ELISA (1)
- EPN (1)
- Einspiel-Kriterium (1)
- Einspielen (1)
- Elastizität (1)
- Elastodynamik (1)
- Elastostatics (1)
- Elektrodynamik (1)
- Endothelzelle (1)
- Enterprise information systems (1)
- Environmental impact (1)
- Enzyme-linked immunosorbent assay (1)
- Epithel (1)
- Exact Ilyushin yield surface (1)
- Experiment (1)
- Fault approximation (1)
- Fault detection (1)
- Fehlerstellen (1)
- Festkörper (1)
- Finite element method (1)
- First Order Reliabiblity Method (1)
- First-order reliability method (1)
- Fließgrenze (1)
- Fluorescence (1)
- GaAs hot electron injector (1)
- Gas sensor (1)
- Geriatric (1)
- German (1)
- Global and local collapse (1)
- Gold nanoparticles (1)
- Grenzwertberechnung (1)
- Gunn diode (1)
- Harnleiter (1)
- Heavy metal detection (1)
- Hemoglobin structure (1)
- High throughput experimentation (1)
- Hip fractures (1)
- Hotplate (1)
- Hydrodynamik (1)
- Hydrogel (1)
- Hydrogen sensor (1)
- Hämoglobinstruktur (1)
- I3S 2005 (1)
- ISFET (1)
- Information extraction (1)
- International Symposium on Sensor Science (1)
- Inverse scattering problem (1)
- Kinematics (1)
- Kinetics (1)
- Knochen (1)
- Knochenbildung (1)
- Knochenchirugie (1)
- Knochendichte (1)
- Körpertemperatur (1)
- LED chip (1)
- Level sensor (1)
- Lichtstreuungsbasierte Instrumente (1)
- MCDA (1)
- MEMS (1)
- Main sensitivity (1)
- Master stamp (1)
- Materialermüdung (1)
- Mechanics (1)
- Mechanische Beanspruchung (1)
- Medusomyces gisevi (1)
- Microreactors (1)
- Model-driven software engineering (1)
- Multi-dimensional wave propagation (1)
- Multicell (1)
- Multiplexing (1)
- Nano Materials (1)
- Nanomaterial (1)
- Nanoparticles (1)
- Nanopartikel (1)
- Nanostructuring (1)
- Nanotechnologie (1)
- Nanotechnology ; Microelectronics ; Biosensors ; Superconductor ; MEMS (1)
- Natriumhypochlorit (1)
- Nichtlineare Gleichung (1)
- Nichtlineare Optimierung (1)
- Nichtlineare Welle (1)
- Organkultur (1)
- Organophosphorus (1)
- Ostazine Orange (1)
- Osteoporose (1)
- Osteoporosis (1)
- PFM (1)
- Permeability (1)
- Permeabilität (1)
- Peroxidase (1)
- Pflanzenstress (1)
- Phenylalanine determination (1)
- Photolithographic mimics (1)
- Plant virus (1)
- Plastizität (1)
- Polylactide acid (1)
- Potentiometry (1)
- Pressure loaded crack-face (1)
- Prevention (1)
- Progressive plastic deformation (1)
- Prophylaxis (1)
- Proteine (1)
- Pseudomonas putida (1)
- Quartz crystal microbalance (1)
- Quartz crystal nanobalance (QCN) (1)
- Quartz micro balances (1)
- Random variable (1)
- Ratcheting (1)
- Ratchetting (1)
- Reaction-diffusion (1)
- Red blood cell storage (1)
- Resistive temperature detector (1)
- Rohr (1)
- Rohrbruch (1)
- Schwammknochen (1)
- Sensitivity (1)
- Sepsis (1)
- Shakedown criterion (1)
- Silk fibroin (1)
- Skeletal muscle (1)
- Small Aral Sea (1)
- Software and systems modeling (1)
- Solid amalgam electrodes (1)
- Stahl (1)
- Statics (1)
- Strukturanalyse (1)
- Supraleiter (1)
- Surface imprinted polymer (1)
- Temperaturabhängigkeit (1)
- Tendons (1)
- Tin oxide (1)
- Tissue Engineering (1)
- Tobacco mosaic virus (TMV) (1)
- UML (1)
- Ultrasound (1)
- Unified Modeling Language (1)
- Vertebroplastie (1)
- Vertebroplasty (1)
- Viscous flow (1)
- Viskose Strömung (1)
- Viskosität (1)
- Wafer (1)
- Wasserbrücke (1)
- Wasserstoffperoxid (1)
- Wellen (1)
- Wolff's Law (1)
- Wolffsches Gesetz (1)
- Wundheilung (1)
- Zeta potential (1)
- Zug-Druck Belastung (1)
- acetoin (1)
- acetoin reductase (1)
- activated nanostructured carbon (1)
- aktivierte nanostrukturierte Kohlenstofffaser (1)
- alcoholic beverages (1)
- alternierend Verformbarkeit (1)
- ammonia gas sensors (1)
- amperometric biosensors (1)
- amperometric sensor (1)
- antimony doped tin oxide (1)
- aromatic amines (1)
- atomic layer deposition (1)
- autofluorescence-based detection system (1)
- bicharacteristics (1)
- bioburdens (1)
- biocompatible (1)
- biocompatible materials (1)
- biodegradabl (1)
- biodegradable electronic devices (1)
- bone density (1)
- bone structure (1)
- burst pressure (1)
- burst tests (1)
- cancellous bone (1)
- capacitive electrolyte–insulator–semiconductor sensors (1)
- capillary micro-droplet cell (1)
- carbon electrodes (1)
- carbonized rice husk (1)
- carcinogens (1)
- catalytic decomposition (1)
- chemical reduction method (1)
- contractile tension (1)
- cross sensitivity (1)
- cytosolic water diffusion (1)
- date palm tree (1)
- design-by-analysis (1)
- direct method (1)
- doped metal oxide (1)
- doped silicon (1)
- doping (1)
- ecological structure (1)
- elastic solids (1)
- electrical capacitance tomography (1)
- electro-migration (1)
- electronic noses dendronized polymers inverted mesa technology (1)
- encapsulation materials (1)
- enzymatic biosensor (1)
- enzymatic methods (1)
- enzyme immobilisation (1)
- epithelization (1)
- fatigue analyses (1)
- fenitrothion (1)
- fibroin (1)
- finite element analysis (1)
- flaw (1)
- fluidic (1)
- fortschreitende plastische Deformation (1)
- gas sensor (1)
- gas sensor array (1)
- glucose (1)
- graphene oxide (1)
- heater metallisation (1)
- hemoglobin (1)
- hemoglobin dynamics (1)
- high-temperature stability (1)
- human dermal fibroblasts (1)
- humidity (1)
- hydrogel (1)
- hydrogen peroxide (1)
- image sensor (1)
- imaging (1)
- impedance spectroscopy (1)
- ion-selective electrodes (1)
- kontraktile Spannung (1)
- konvexe Optimierung (1)
- lab-on-a-chip (1)
- lab-on-chip (1)
- large language models (1)
- layer expansion (1)
- layer-by-layer technique (1)
- lenslet array (1)
- light scattering analysis (1)
- lightning flash (1)
- limit and shakedown analysis (1)
- linear kinematic hardening (1)
- load limit (1)
- lower bound theorem (1)
- magnetic particles (1)
- material shakedown (1)
- matrix method (1)
- mechanical waves (1)
- metagenomics (1)
- metal oxide (1)
- microbial diversity (1)
- microreactor (1)
- microwave generation (1)
- modeling biosensor (1)
- modelling (1)
- modified electrode (1)
- multi-interface measurement (1)
- nanomaterials (1)
- naphtols (1)
- nitrogen oxides (1)
- nonlinear kinematic hardening (1)
- nonlinear optimization (1)
- nonlinear solids (1)
- nonlinear tensor constitutive equation (1)
- organic PVC membranes (1)
- pH sensors (1)
- pH-based biosensing (1)
- pattern-size reduction (1)
- penicillin (1)
- penicillinase (1)
- phenols (1)
- photoelectrochemistry (1)
- pipes (1)
- plant stress (1)
- plasma generated ions (1)
- polyaniline (1)
- polymer composites (1)
- porous Pt electrode (1)
- principal component (1)
- probabilistic fracture mechanics (1)
- protein (1)
- quantum charging (1)
- reliability (1)
- reliability analysis (1)
- rhAPC (1)
- screen-printing (1)
- second-order reliability method (1)
- self-aligned patterning (1)
- semantic role labeling (1)
- sensing properties (1)
- shakedown analyses (1)
- shotgun sequencing (1)
- speaker attribution (1)
- sterilisation (1)
- sterility tests (1)
- sterilization efficacy (1)
- sterilization methods (1)
- subsurface ice research (1)
- subsurface probe (1)
- surface modification (1)
- swift heavy ions (1)
- tension–torsion loading (1)
- thermal ratcheting (1)
- thick-film technology (1)
- thin-film microsensors (1)
- titanium dioxide photoanode (1)
- ultrathin gate insulators (1)
- validation methods (1)
- vessels (1)
- voltammetry (1)
- wafer-level testing (1)
- water bridge phenomenon (1)
- wound healing (1)
- yield stress (1)
The propagation of mechanical waves in plates of isotropic elastic material is investigated. After a short introduction to the understanding of focussing of stress waves in a plate with a curved boundary the method of characteristics is applied to a plate of hyperelastic material. Using this method the propagation of acceleration waves is discussed. Based on this a numerical difference scheme is developed for solving initial-boundary-value problems and applied to two examples: propagation of a point disturbance in a homogeneously finitely strained non-linear elastic plate and geometrical focussing in al linear elastic plate.
Shock waves, explosions, impacts or cavitation bubble collapses may generate stress waves in solids causing cracks or unexpected dammage due to focussing, physical nonlinearity or interaction with existing cracks. There is a growing interest in wave propagation, which poses many novel problems to experimentalists and theorists.
The nonlinear scalar constitutive equations of gases lead to a change in sound speed from point to point as would be found in linear inhomogeneous (and time dependent) media. The nonlinear tensor constitutive equations of solids introduce the additional local effect of solution dependent anisotropy. The speed of a wave passing through a point changes with propagation direction and its rays are inclined to the front. It is an open question whether the widely used operator splitting techniques achieve a dimensional splitting with physically reasonable results for these multi-dimensional problems. May be this is the main reason why the theoretical and numerical investigations of multi-dimensional wave propagation in nonlinear solids are so far behind gas dynamics. We hope to promote the subject a little by a discussion of some fundamental aspects of the solution of the equations of nonlinear elastodynamics. We use methods of characteristics because they only integrate mathematically exact equations which have a direct physical interpretation.
Limit and shakedown theorems are exact theories of classical plasticity for the direct computation of safety factors or of the load carrying capacity under constant and varying loads. Simple versions of limit and shakedown analysis are the basis of all design codes for pressure vessels and pipings. Using Finite Element Methods more realistic modeling can be used for a more rational design. The methods can be extended to yield optimum plastic design. In this paper we present a first implementation in FE of limit and shakedown analyses for perfectly plastic material. Limit and shakedown analyses are done of a pipe–junction and a interaction diagram is calculated. The results are in good correspondence with the analytic solution we give in the appendix.
Safety and reliability of structures may be assessed indirectly by stress distributions. Limit and shakedown theorems are simplified but exact methods of plasticity that provide safety factors directly in the loading space. These theorems may be used for a direct definition of the limit state function for failure by plastic collapse or by inadaptation. In a FEM formulation the limit state function is obtained from a nonlinear optimization problem. This direct approach reduces considerably the necessary knowledge of uncertain technological input data, the computing time, and the numerical error. Moreover, the direct way leads to highly effective and precise reliability analyses. The theorems are implemented into a general purpose FEM program in a way capable of large-scale analysis.
The structural reliability with respect to plastic collapse or to inadaptation is formulated on the basis of the lower bound limit and shakedown theorems. A direct definition of the limit state function is achieved which permits the use of the highly effective first order reliability methods (FORM) is achieved. The theorems are implemented into a general purpose FEM program in a way capable of large-scale analysis. The limit state function and its gradient are obtained from a mathematical optimization problem. This direct approach reduces considerably the necessary knowledge of uncertain technological input data, the computing time, and the numerical error, leading to highly effective and precise reliability analyses.
Limit and shakedown analysis are effective methods for assessing the load carrying capacity of a given structure. The elasto–plastic behavior of the structure subjected to loads varying in a given load domain is characterized by the shakedown load factor, defined as the maximum factor which satisfies the sufficient conditions stated in the corresponding static shakedown theorem. The finite element dicretization of the problem may lead to very large convex optimization. For the effective solution a basis reduction method has been developed that makes use of the special problem structure for perfectly plastic material. The paper proposes a modified basis reduction method for direct application to the two-surface plasticity model of bounded kinematic hardening material. The considered numerical examples show an enlargement of the load carrying capacity due to bounded hardening.