A Method for the Experimental Determination of Residual Stresses in Axisymmetric Composite Cylinders

1992 ◽  
Vol 114 (1) ◽  
pp. 90-96 ◽  
Author(s):  
F. G. Rammerstorfer ◽  
F. D. Fischer
Keyword(s):  
Residual Stresses ◽  
Experimental Determination ◽  
Arbitrary Number ◽  
Analytical Procedure ◽  
Circular Cylinders ◽  
Composite Cylinders ◽  
Long Cylinder

An analytical procedure applicable for the experimental determination of initially existing residual stresses in long composite circular cylinders is derived within the framework of the drilling and turning technique. The method is demonstrated for a long cylinder composed of two different materials. An extension to cylinders composed of an arbitrary number of circular cylindrical layers can easily be derived in analogy to the described procedures.

Stresses in Pressurized Circular Shells With Discontinuities, With or Without Stiffeners

1972 ◽  
Vol 16 (02) ◽  
pp. 140-147
Author(s):  
A. J. Durelli ◽  
V. J. Parks
Keyword(s):  
Experimental Determination ◽  
Mechanical Strain ◽  
Three Dimensional ◽  
Pressure Vessels ◽  
Circular Cylinders ◽  
Constant Thickness ◽  
Strain Gages ◽  
Circular Holes ◽  
Reinforcing Ribs

This paper is a summary of a series of five research programs dealing with the experimental determination of stresses, strains, and displacements in circular cylinders subjected to pressure. The vessels have either constant thickness or transverse reinforcing ribs. Circular holes, with either plain or reinforced edges, are located in different positions of the vessels. The methods used for the analysis are: brittle coatings, three-dimensional photoelasticity ("freezing" technique), and electrical and mechanical strain gages. The most important results are summarized in a table. These results will be of interest to designers of underwater ships and of pressure vessels in general.

Residual Stresses Generated by the Combined Burnishing - Cutting Process in the Worked Parts

2014 ◽  
Vol 657 ◽  
pp. 103-107 ◽  
Author(s):  
Gheorghe Brabie ◽  
Gheorghe Mustea ◽  
Bogdan Chirita
Keyword(s):  
Magnesium Alloy ◽  
Residual Stresses ◽  
Experimental Determination ◽  
Experimental Investigations ◽  
Machined Surface ◽  
Combined Process ◽  
Part Surface ◽  
Working Parameters ◽  
Compressive Residual Stresses

The cutting followed by burnishing, used like a combined process, leads to the improvement of the part surface quality (roughness, hardness, microstructure etc.) and to reduction of the costs and manufacturing times as a function of different working parameters. One of the factors and parameters that characterize the machined surface by this combined process is the residual stresses that are generated and located in the part deformed strata. The present paper analyses the results concerning the experimental determination of the residual stresses generated in the machined surfaces of parts made from magnesium alloy by the burnishing - turning combined process. The experimental investigations have shown that in the machined strata the combined process determines the occurrence of the compressive residual stresses and hence the fatigue and cracking resistances of the machined materials will be improved.

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