Variable Section

Variable Section

 

an elongated metal product whose cross section varies continuously or in steps along its length. Sections with continuously variable cross sections are produced mainly by continuously varying the distance between the rolls while rolling. Sections with stepwise variable cross sections are produced mainly by pressing, or extrusion, through a die. In order to obtain sections with variable external dimensions, the dies are changed during the pressing process. Hollow sections with variable internal dimensions are produced by changing the position of a stepped pin (mandrel) within the die. A variable section can also be obtained by stamping separate portions of an elongated profile of constant cross section. Variable sections are used for the production of cantilever structures and of welded or riveted structures when thicker material is required to achieve joints of equal strength.

REFERENCES

Shor, E. R. Novye protsessy prokatki. Moscow, 1960. Ermanok, M. Z., and V. V. Siniakov. Pressovanie profilei i trub periodicheski izmeniaiushchegosia secheniia. Moscow, 1968.
References in periodicals archive ?
It should be noted that all these works study the stress-strain state, durability and strength frame structures of variable section, but, unfortunately, the results of all the studies have not been definitively formulated the calculation method for thin-walled elements with action the compression of the bend.
Some specific subjects are finite element analysis of a concrete-filled rectangular tubular frame, in-plane stability bearing capacity of a variable section column, free vibration of a shallow-spherical shell, strain measuring techniques for the geogrid, and prevention of cracks in brick masonry.
The use of electric drives greatly reduces the reaction time of the meter during sectional control and enables compensation for variable section size.
Human Experiences as Promising Lines of Investigation of Mind-Brain Relationship" is the fourth major section: It is a very variable section and possibly could just as easily been called "Survival.
Additionally the GT70 lets users choose from among five keyboard backlighting scenarios--Normal, Gaming, Wave, Breathing, and Dual Color, that can be used in coordination with variable section lighting, and seven colors offering over 1,000 variations.
The seven vertical protrusions with variable section are the rotor's blades and they are also symmetrical in relation to the axis of the rotor.
Mike Simonsen, one of the world's leading variable star observers, is development director for the AAVSO and heads its Cataclysmic Variable Section, Chart Team, and Mentor Program.
The KS Kolbenschmidt answer is a variable section cooling passage which gives enhanced cooling effect at the bowl lip and the top groove via improved material distribution compared with conventional cooling galleries.
The throttle itself consists of a fixed section together with a variable section, where the axis of rotation is the direction of extrusion.
Khatchaturian had a score that was equivalent to a chance score,'' Klein said of the variable section.
Each test will also contain a variable section that will not count toward a test taker's score but will be used to select questions for future versions of the exam.
This contract is for the supply (as a rental) and installation of equipment related to the production of elements restructuring wastewater systems, variable section (circular and oval), mainly in visitable networks.

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