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A beam or other structural member which is subject to compressive stress.



Related Terms

ELASTIC CURVE

The curved shape of the longitudinal centroidal surface of a beam when the transverse loads acting on it produced wholly elastic stresses.

ION MACHINING

Use of a high-velocity ion beam to remove material from a surface. Also known as ion beam thinning, ion milling.

ELECTRON-BEAM CHANNELING

The technique of transporting high-energy, high-current electron beams from an accelerator to a target through a region of high-pressure gas by creating a path through the gas where the gas density may be temporarily reduced; the gas may be ionized; or a current may flow whose magnetic field focuses the electron beam on the target.

REFLECTING PRISM

A prism that deviates a light beam by internal reflection.

TIDE CRACK

A crack at the line of junction between an immovable icefoot or ice wall and fast ice the latter subject to rise and fall of the tide.

GRAPHITE ANODE

  1. One of the electrodes of graphite used in a mercury cell to produce chlorine by electrolysis. 2. The rod of graphite which is inserted into the mercury-pool cathode of an ignitron to start current flow. 3. The collector of electrons in a beam power tube or other high-current tube.

COMMON JOIST

An ordinary floor beam to which floor boards are attached.

ELECTRON-BEAM ION SOURCE

A source of multiply charged heavy ions which uses an intense electron beam with energies of 5 to 10 kiloelectronvolts to successively ionize injected gas. Abbreviated EBIS.

ABAFT OF THE BEAM

Bearings over the beam to the stern, the ships after sections.

WEB

Multiple component vertical sections forming a reinforced beam or multiple athwartship sections forming a reinforced frame.

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