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| Author | : Myron Abbott Cantor |
| Publisher | : |
| Total Pages | : 66 |
| Release | : 1939 |
| Genre | : |
| ISBN | : |
| Author | : Thomas F. MacLaughlin |
| Publisher | : |
| Total Pages | : 23 |
| Release | : 1965 |
| Genre | : |
| ISBN | : |
A three-dimensional photoelastic stress analysik was conducted on six thick-walled closed-end cylinders subjected to internal pressure loading. The cylinders were approximately similar in design to the breech chamber of a large caliber tank weapon. Maximum octahedral shear stresses were determined in the side wall-end wal juncture of essentially flat-ended cylinders (similar to the actual weapon component) and in hemisphericallyended cylinders. The purpose of the study was to learn more about the stresses in the closed end of the cylinder so that future components of this type may be designed more efficiently with regard to stress and weight. (Author).
| Author | : University of Illinois at Urbana-Champaign. Department of Theoretical and Applied Mechanics |
| Publisher | : |
| Total Pages | : 114 |
| Release | : 1958 |
| Genre | : Universities and colleges |
| ISBN | : |
| Author | : James Adam Baird |
| Publisher | : |
| Total Pages | : 84 |
| Release | : 1963 |
| Genre | : Photoelasticity |
| ISBN | : |
| Author | : R. Weller |
| Publisher | : |
| Total Pages | : 42 |
| Release | : 1939 |
| Genre | : Photoelasticity |
| ISBN | : |
A method has been developed for making photoelastic analyses of three-dmensional stress systems by utilizing the polarization phenomena associated with the scattering of light. By this method, the maximum shear and the directions of the three principal stresses at any point within a model can be determined, and the two principal stresses at a free-bounding surface can be seaparately evaluated. Polarizing light is projected into the model through a slit so that it illuminates a plane section. The light is continuously analyzed along its path by scattering and the state of stress in the illuminated section is obtained. By means of a series of such sections, the entire stress field may be explored. The method was used to analyze the stress system of a simple beam in bending. The results were found to be in good agreement with those expected from elementary theory.
| Author | : |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2004 |
| Genre | : |
| ISBN | : |
In this study, the frozen stress photoelastic method was used to investigate the three-dimensional effect on the crack growth behavior in a centrally perforated circular cylinder under internal pressure. The inner surface of the cylinder had a star shape, which consisted of six fins. The specimens were capped at the ends and pressurized internally above critical temperature after real cracks were introduced at the fin tip. After growing to a desired size, the pressure was reduced to stop crack growth and held through cooling. Two different types of cracks, part-through crack and long crack with the crack length nearly equal to the length of the cylinder, were considered. The experimental data were analyzed, and the results are discussed.
| Author | : Max Mark Frocht |
| Publisher | : |
| Total Pages | : 70 |
| Release | : 1952 |
| Genre | : Loads (Mechanics) |
| ISBN | : |
The method of strain measurement after annealing is reviewed and found to be unsatisfactory for the materials available in this country. A new, general method is described for the photoelastic determination of the principal stresses at any point of a general body subjected to arbitrary loads. The method has been applied to a sphere subjected to diametral compressive loads. The results show possibilities of high accuracy.
| Author | : John Vieira |
| Publisher | : |
| Total Pages | : 59 |
| Release | : 1964 |
| Genre | : |
| ISBN | : |
A study was conducted to determine stress distributions in several types of thick-walled cylindrical shells. The stresses were determined by using both the embeddedpolariscope and stress-freezing methods for threedimensional photoelasticity. The study indicates that an approximate analytical solution for stresses in thick-walled cylinders with hemispherical heads is sufficiently accurate for structural design applications. Simple curved beam theory is also shown to give reasonable stress values for certain structures which take the form of a thick-walled half cylinder. Finally the study indicates that embedded polaroid elements perform satisfactorily under complex states of stress; therefore, the embedded-polariscope method represents a completely feasible approach for transient three-dimensional stress determinations. (Author).
| Author | : Bernard Fried |
| Publisher | : |
| Total Pages | : 28 |
| Release | : 1940 |
| Genre | : Photoelasticity |
| ISBN | : |
| Author | : M. M. Leven |
| Publisher | : Elsevier |
| Total Pages | : 494 |
| Release | : 2013-10-22 |
| Genre | : Technology & Engineering |
| ISBN | : 1483158543 |
Photoelasticity presents the development of photoelasticity. This book discusses the principle of optical equivalence of stressed isotropic bodies. Organized into 29 chapters, this book begins with an overview of the progress in three-dimensional photoelasticity. This text then summarizes the approximate theoretical analysis by the strain-energy technique and derives the basic equations for the evaluation of P and Q by graphical integration. Other chapters consider the importance of stress concentrations in the domain of strength of materials, particularly where fatigue is present. This book discusses a well the various instructive fractures and indicates that the strength of bakelite is determined by the maximum tensile stresses as computed by advanced methods of stress analysis. The final chapter deals with the two fundamental problems in three-dimensional photoplasticity and explains the general stress-optic law under plastic flow without unloading. This book is a valuable resource for designers as well as mechanical and civil engineers.
