Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 28 for “"stress concentration factor"”.
-
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 …
-
Determination of stress concentration factors using experimental methods
Several 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 …
-
Stress concentrations in undercut spur gear teeth via the finite element method
… analysis 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 …
-
Fatigue Performance of Brass Light Pole Couplings
… and 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 …
-
A finite element analysis of pinion shaped spur gear teeth
… with a pinion cutter upon the geometry and root stresses in external spur gears using the finite element method is given. The models analyzed have the shape of a ring with three teeth. The middle tooth is loaded and load sharing has been assumed. Thirty-five finite element models were used for …
-
Concentração de tensões em chapas infinitas tracionadas
… work 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 …
-
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 …
-
Stress reduction in a plate with a hole by applied induced strains
This work investigates the potential 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 …
-
Isogeometric Finite Element Code Development for Analysis of Composite Structures
… diminishing property of Nurbs basis for stress analysis of composite and sandwich beams 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 …
-
ΠΡΟΣΔΙΟΡΙΣΜΟΣ ΤΩΝ ΓΕΩΜΕΤΡΙΚΩΝ ΜΕΓΕΘΩΝ ΠΟΥ ΟΡΙΟΘΕΤΟΥΝ ΤΗΝ ΑΝΤΟΧΗ ΣΕ ΚΑΜΨΗ ΤΩΝ ΔΟΝΤΙΩΝ ΟΔΟΝΤΩΤΩΝ ΤΡΟΧΩΝ
PRESUPOSITION FOR THE CALCULATION OF BENDING STRESSES ON THE GEAR TEETH ROOT, IS THE KNOWLEDGE OF THE TOOTH PROFILE WHICH, SHOULD BE NOTED, IS DIFFERENT FOR GEARS WITH DIFFERENT NUMBER OF TEETH. OWING TO THE RESEARCH DEVELOPED IN THIS DISSERTATION IT WAS SUCCEEDED: A) TO DERIVE EQUATIONS WHICH GIVE …
-
The development of design criteria for a rotating disk containing noncentral circular hole patterns
The problem of finding the stress distribution about circular, noncentral holes in a spinning disk is discussed. A theoretical approximation is first developed using the methods of elasticity and combining solutions to similar problems from Ling (reference 6) and Timoshenko and Goodier (reference …
-
A finite element mesh optimization procedure using a thermal expansion analogy
… In one test case, the errors in the maximum stresses are reduced by more than 1/3 after 1 iteration. In another test case, the error in the stress concentration factor is reduced by more than 3/4 after 7 iterations.
-
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 …
-
Investigation of the Effects of Geometry on the Efficiency of the Double Lap Joint of Unidirectional Fiberglass Composites
… Through 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 …
-
A study of fretting fatigue incorporating sharp corner contact geometry.
… of dominant fretting cracks by influencing the stress distributions in the region of the contact.The current research programme presents a method of analysing flat contacts containing sharp comers. The method includes the development of a finite element solution capable of accurately predicting …
-
A geometric method of fatigue SCF and fracture SIF assessment
… a novel geometric methodology to evaluate the stress intensity and stress concentration factors (SIF and SCF). The background and special theory was developed to give: 1. A better understanding of the singularities that commonly occur in sharp corners in ship connection details; 2. A quicker …
-
Integrated structural analysis and design using 3-D finite elements
… The plates were optimized so as to minimize the stress concentration near the hole measured by the ratio of the Von Mises stress to the applied boundary stress. The analysis program was validated by comparison to a commercial finite-element program as well as photoelastically obtained stress …
-
Development of interactive computer programs for mechanical engineering design: fatigue analysis, section properties, and beam analysis
… failure lines are available and any equivalent stress theories are allowed. It can also calculate the significant endurance limit with the theoretical stress concentration factor supplied by the user. The Section Properties program finds twenty section properties, such as area, area moment of …
-
Interacting stress concentration factors and their effect on fatigue of metallic aerostructures
… or some other similar detail. The interaction of stress concentration effects between a hole and step are not well understood and the resulting impact on fatigue performance is difficult to predict. There exists a need for fatigue data that can be used to determine the analysis methods for …
-
ΓΕΝΙΚΕΥΜΕΝΑ ΚΡΙΤΗΡΙΑ ΑΣΤΟΧΙΑΣ ΑΡΧΙΚΩΣ ΑΝΙΣΟΤΡΟΠΩΝ ΕΛΑΣΤΙΚΩΝ ΜΕΣΩΝ ΜΕ ΙΔΙΑΙΤΕΡΗ ΕΜΦΑΣΗ ΣΤΑ ΣΥΝΘΕΤΑ ΥΛΙΚΑ
… COMPLIANCE TENSOR COMPONENTS ON THE INCLUDED STRESS FIELD OF PLANE STRESS PROBLEMS WAS STUDIED. BY CALCULATING THE STRESS FIELD IN THE VICINITY OF ANELLIPTIC CUT OF AN ORTHOTROPIC PLATE, AS WELL AS THE STRESS CONCENTRATION INDUCED ON ITS BOUNDARY, IT WAS PROVED THAT FOR A SPECIFIC COUPLING OF …
Page 1 of 2