By E. Mönch (auth.), Masataka Nisida, Kozo Kawata (eds.)
Thirty-five papers have been awarded on the foreign Symposium on Photoelasticity, Tokyo, 1986, representing fifty-five authors. Eighteen of those papers have been provided by way of eastern photoelasticians and seventeen via major international experts from 11 international locations (Austria, Canada, Czechoslovakia, F.R. of Germany, France, Greece, India, Switzerland, united kingdom, united states and USSR) • this can be the 1st symposium on photoelasticity of foreign scope held in Japan. the first goals of this symposium are to aid bridge the space among photoelastic researchers all over the world, to advertise mutual realizing and communications and to facilitate trade of newly received wisdom in theories and methods. additionally, it's important that those worthy effects are communicated successfully to engineers who can follow them in perform in undefined. The papers awarded at this symposium disguise all branches of photograph elasticity in a large feel, together with, as well as lengthy estab lished photoelasticity, newly constructed moire, interferometric, and holographic photoelasticity, caustics and speckle. consequently, from an optical rigidity research pe~spective, this quantity is the most recent compre hensive number of photoelastic expertises.
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Extra info for Photoelasticity: Proceedings of the International Symposium on Photoelasticity, Tokyo, 1986
Example text
The experiment simulates single steps in the fabrication process. These give information over the major stresses in component and tool in this step. Fig. 20 shows an isochromate picture of a "kneaded" polygon profile, in which one recognizes the high deformation grade of one step causing cracking and double-layers. Further, the area of the profile having the highest strain concentration in its later use is pre-stressed by compression during the fabrication process. 5. Prospects of different applications The model process described leads to a knowledge of stresses during and after plastic-elastic and plastic deformation.
21 Relations among Loading Time, Birefringence [Nlt, Stress 0, and Strain E - - Analysis of Stress and Strain Distributions during Creep The variations of birefringence [Nlt and strain E of 5-5 mixed polyester during creep under a constant tensile stress of the strip specimen are shown in Figs. 11 and 12 respectively. Using these diagrams of birefringence [Nlt and strain E under creep, relations between stress and birefringence [Nlt, stress and strain E, and strain E and birefringence [Nlt with loading time t can be obtained as shown in Figs.
28 CONCLUSIONS The simplified optical method based on linear photoviscoelastic theory was proposed for measuring the residual stress by rapid cooling in thermosetting resin plates. First, the fundamental equation for calculating the residual stress from the residual birefringence was obtained. Then, thermosetting resin plates were actually subjected to rapid cooling from both surfaces. The residual stress of the plate was measured by two methods, the simplified optical method and the well-known mechanical method, and the results were similar.