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Showing 1 to 20 of 42 for “"concentration factor"”.
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Torsional stress concentration factor for hollow stepped shafts
In this investigation the stress concentration factor was evaluated for a hollow stepped shaft with variable wall thickness and two fillet sizes. Electric strain gages of the SR-4 type were employed to measure strains in the fillet section. Values of the stress concentration factor were determined …
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Silicon concentrator cells in a two-stage photovoltaic system with a concentration factor of 300x
… system is that it enables a high geometrical concentration of 300x in combination with a high optical efficiency (around 78%) and a large acceptance angle of ± 23.5° all year through. For this, the system uses a parabolic mirror (40.4x) and a three dimensional second stage consisting of …
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Determination of stress concentration factors using experimental methods
… experimental methods are examined for stress concentration factor determination. Tests are performed on a chosen 2-D specimen using strain gages, brittle coating, brittle specimen failure, photoelasticity, and Moire interferometry. Results are compared to each other and to finite element …
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Stress concentrations in undercut spur gear teeth via the finite element method
… of the influence of undercutting on the stress concentration factor for undercut gears using the finite element method is presented. The models used are in the shape of a whole gear with three teeth. The middle tooth is loaded assuming single-tooth contact. Thirty seven finite element models …
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Fatigue Performance of Brass Light Pole Couplings
… individual loading configurations. The stress concentration factor, Ktb, determined by strain measurement at hexagonal and notched sections was 5.70, which is slightly higher than the theoretical stress concentration factor of 4.7. Fatigue tests were also performed on the notched specimens of …
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A finite element analysis of pinion shaped spur gear teeth
… models were used for the computation of stress concentration factors in pinion shaped gear teeth. The results for pinion shaped teeth are compared to those results obtained when shaping with a hob. The Dolan and Broghamer stress concentration factor was also calculated for comparison with the …
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Concentração de tensões em chapas infinitas tracionadas
… presents a theoretical development about stress concentration in infinite plates with holes, using complex variables functions. Applications of this technique to different problems are presented as well as the soluction of the same problems using Finite Element Method. Through results comparison, …
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Concentração de tensões em entalhes-U
The variation of the stress concentration factor in the root of U-shaped notches in thin plates with their increasing depth is studied on the basis of empirically derived formulae found in the literature on the subject. It is considered that the plates are under in-plane loads causing simple …
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Stress reduction in a plate with a hole by applied induced strains
… of reducing stresses in the region of stress concentration by applied induced strains. A thin 30 inch square plate with a 1 inch diameter circular hole under uniaxial load was used for this investigation. This investigation considered first an ideal case with a few physical limitations for the …
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Isogeometric Finite Element Code Development for Analysis of Composite Structures
… and plates. This research also computes stress concentration factor in a composite plate with a hole. Isogeometric nonlinear/linear finite element code is developed for static and dynamic analysis of laminated composite plates. Nurbs linear, quadratic, higher-order and k-refined elements are …
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Lysozyme Separation from Tobacco Extract by Aqueous Two-Phase Extraction
… with large quantities of biomass with a dilute concentration of product is a challenge for down-stream processing. Aqueous two-phase extraction (ATPE) has been used in purifying proteins from various sources. It is a protein-friendly process and can be scaled up easily. ATPE was studied for its …
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ΠΡΟΣΔΙΟΡΙΣΜΟΣ ΤΩΝ ΓΕΩΜΕΤΡΙΚΩΝ ΜΕΓΕΘΩΝ ΠΟΥ ΟΡΙΟΘΕΤΟΥΝ ΤΗΝ ΑΝΤΟΧΗ ΣΕ ΚΑΜΨΗ ΤΩΝ ΔΟΝΤΙΩΝ ΟΔΟΝΤΩΤΩΝ ΤΡΟΧΩΝ
… FINITE ELEMENT METHOD AND TO COMPUTE THE STRESS CONCENTRATION FACTOR IN THIS REGION. C) TO FORMULATE A METHODOLOGY CORRESPONDING TO ACADEMIC DEONTOLOGY FOR THE BENDING CALCULATION.
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The development of design criteria for a rotating disk containing noncentral circular hole patterns
… are then found in the form of a maximum stress concentration factor which occurs at the edges of the holes. The accuracy of the derived solution is checked by obtaining values photoelastically from a similar spinning disk. Stress patterns are studied in photographs obtained with a strobeflash …
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Analytical and numerical prediction of localized necking in sheet metal forming processes
… the incremental strain ratio, critical stress concentration factor and critical strain concentration factor) were not constant for the various strain paths for three analytical models considered. Finally, finite element analysis (FEA) is used to predict the FLC with a stress-based failure …
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A finite element mesh optimization procedure using a thermal expansion analogy
… In another test case, the error in the stress concentration factor is reduced by more than 3/4 after 7 iterations.
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Characterization of a 3D printed pumped counterflow virtual impactor and an aerodynamic lens concentrator
… concentrated particles, but at a lower concentration factor than the industrial concentrator. This study revealed potential for further refinement in design features for both devices and it served as an essential pre-study for future field campaigns that will use these 3D printed devices.
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A simplified method for the photoelastic determination of stress concentration factors in a tensile stress field
The stress concentration factors for rectangular slots with semicircular ends with their major axes inclined to the direction of a uniaxial tension field were investigated by photoelastic methods. A major portion of this thesis deals with the problem of loading a circular disk such as to create an …
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Investigation of the Effects of Geometry on the Efficiency of the Double Lap Joint of Unidirectional Fiberglass Composites
… computer analysis, the effects on the stress concentration factor as a function of geometry was investigated. Then, using testing and fracture mechanics techniques, calibration factors for Mode II loading of the two geometries were obtained. The analysis of the results was performed by …
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A study of fretting fatigue incorporating sharp corner contact geometry.
… are then used to generate a multiaxial stress concentration factor, which provide the basis for a fretting fatigue life prediction method. Furthermore, the research programme investigates the phenomenological effects observed during fretting fatigue. The study investigates friction behaviour …
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Numerical Modeling for the Solute Uptake from Groundwater by Plants-Plant Uptake Package
… conceptual model takes into account both Root Concentration Factor, RCF, and Transpiration Stream Concentration Factor, TSCF for chemicals which are a function of Kow. A similar technique used to simulate the solute transport in groundwater to simulate sorption and plant uptake is used. The …
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