Refine
Year of publication
Institute
Has Fulltext
- no (151) (remove)
Language
- English (151) (remove)
Document Type
- Article (101)
- Conference Proceeding (30)
- Part of a Book (13)
- Book (4)
- Other (3)
Keywords
- Biocomposites (2)
- Limit analysis (2)
- Natural fibres (2)
- Polymer-matrix composites (2)
- Shakedown analysis (2)
- Stress concentrations (2)
- damage (2)
- Anastomotic leakage (1)
- Autolysis (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)
- Damage mechanics theory (1)
- Decomposition (1)
- Discontinuous fractures (1)
- Drug simulation (1)
- ES-FEM (1)
- Electromechanical modeling (1)
- End-to-end colorectal anastomosis (1)
- Evolution of damage (1)
- Extension fracture (1)
- Extension strain criterion (1)
- Extracellular matrix (ECM) (1)
- FS-FEM (1)
- Finite element analysis (1)
- Finite element analysis (FEA) (1)
- Finite element modelling (1)
- Freeze–thaw process (1)
- Frequency adaption (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)
- Liver (1)
- Mechanical simulation (1)
- Mechanical stability (1)
- Mohr–Coulomb criterion (1)
- Multimode failure (1)
- Muscle fibers (1)
- Non-linear optimization (1)
- Non-parallel fissures (1)
- Passive stretching (1)
- Pelvic floor dysfunction (1)
- Pelvic muscle (1)
- Pharmacology (1)
- Reconstruction (1)
- Reliability analysis (1)
- Reliability of structures (1)
- S-FEM (1)
- Spleen (1)
- Stochastic programming (1)
- Surgical staplers (1)
- Tapered ends (1)
- Uniaxial compression test (1)
- Ureter (1)
- Variable height stapler design (1)
- anaesthetic complications (1)
- anisotropy (1)
- biaxial tensile experiment (1)
- chance constrained programming (1)
- constitutive modeling (1)
- dental trauma (1)
- difficult airway (1)
- distorted element (1)
- double-lumen tube intubation (1)
- hiPS cardiomyocytes (1)
- hyperelastic (1)
- limit analysis (1)
- non-simplex S-FEM elements (1)
- reliability of structures (1)
- shakedown analysis (1)
- smooth muscle contraction (1)
- stochastic programming (1)
- strain energy function (1)
- training simulator (1)
- videolaryngoscopy (1)
- virgin passive (1)
- virtual reality (1)
- viscoelasticity (1)
Wind is closely associated with the discussion of fairness in ski jumping. To counter-act its influence on the jump length, the International Ski Federation (FIS) has introduced a wind compensation approach. We applied three differently accurate computer models of the flight phase with wind (M1, M2, and M3) to study the jump length effects of various wind scenarios. The previously used model M1 is accurate for wind blowing in direction of the flight path, but inaccuracies are to be expected for wind directions deviating from the tangent to the flight path. M2 considers the change of airflow direction, but it does not consider the associated change in the angle of attack of the skis which additionally modifies drag and lift area time functions. M3 predicts the length effect for all wind directions within the plane of the flight trajectory without any mathematical simplification. Prediction errors of M3 are determined only by the quality of the input data: wind velocity, drag and lift area functions, take-off velocity, and weight. For comparing the three models, drag and lift area functions of an optimized reference jump were used. Results obtained with M2, which is much easier to handle than M3, did not deviate noticeably when compared to predictions of the reference model M3. Therefore, we suggest to use M2 in future applications. A comparison of M2 predictions with the FIS wind compensation system showed substantial discrepancies, for instance: in the first flight phase, tailwind can increase jump length, and headwind can decrease it; this is opposite of what had been anticipated before and is not considered in the current wind compensation system in ski jumping.
This paper presents a numerical procedure for reliability analysis of thin plates and shells with respect to plastic collapse or to inadaptation. The procedure involves a deterministic shakedown analysis for each probabilistic iteration, which is based on the upper bound approach and the use of the exact Ilyushin yield surface. Probabilistic shakedown analysis deals with uncertainties originated from the loads, material strength and thickness of the shell. Based on a direct definition of the limit state function, the calculation of the failure probability may be efficiently solved by using the First and Second Order Reliability Methods (FORM and SORM). The problem of reliability of structural systems (series systems) is handled by the application of a special technique which permits to find all the design points corresponding to all the failure modes. Studies show, in this case, that it improves considerably the FORM and SORM results.