[机] 拉力构件

Member \Mem"ber\, n. [OE. membre, F. membre, fr. L. membrum; cf.
Goth. mimz flesh, Skr. mamsa.]
1. (Anat.) A part of an animal capable of performing a
distinct office; an organ; a limb.

We have many members in one body, and all members
have not the same office. --Rom. xii. 4.

2. Hence: A part of a whole; an independent constituent of a
body; as:
(a) A part of a discourse or of a period or sentence; a
clause; a part of a verse.
(b) (Math.) Either of the two parts of an algebraic
equation, connected by the sign of equality.
(c) (Engin.) Any essential part, as a post, tie rod,
strut, etc., of a framed structure, as a bridge truss.
(d) (Arch.) Any part of a building, whether
constructional, as a pier, column, lintel, or the
like, or decorative, as a molding, or group of
moldings.
(e) One of the persons composing a society, community, or
the like; an individual forming part of an
association; as, a member of the society of Friends.
(f) (Math.) one of the elements which, taken together,
comprise a set.
(g) (Math.) one of the individual objects which comprise a
group or class.
[1913 Webster +PJC]

{Compression member}, {Tension member} (Engin.), a member, as
a rod, brace, etc., which is subjected to compression or
tension, respectively.


Tension \Ten"sion\, n. [L. tensio, from tendere, tensum, to
stretch: cf. F. tension. See {Tense}, a.]
1. The act of stretching or straining; the state of being
stretched or strained to stiffness; the state of being
bent strained; as, the tension of the muscles, tension of
the larynx.

2. Fig.: Extreme strain of mind or excitement of feeling;
intense effort.

3. The degree of stretching to which a wire, cord, piece of
timber, or the like, is strained by drawing it in the
direction of its length; strain. --Gwilt.

4. (Mech.) The force by which a part is pulled when forming
part of any system in equilibrium or in motion; as, the
tension of a srting supporting a weight equals that
weight.

5. A device for checking the delivery of the thread in a
sewing machine, so as to give the stitch the required
degree of tightness.

6. (Physics) Expansive force; the force with which the
particles of a body, as a gas, tend to recede from each
other and occupy a larger space; elastic force;
elasticity; as, the tension of vapor; the tension of air.

7. (Elec.) The quality in consequence of which an electric
charge tends to discharge itself, as into the air by a
spark, or to pass from a body of greater to one of less
electrical potential. It varies as the quantity of
electricity upon a given area.

{Tension brace}, or {Tension member} (Engin.), a brace or
member designed to resist tension, or subjected to
tension, in a structure.

{Tension rod} (Engin.), an iron rod used as a tension member
to strengthen timber or metal framework, roofs, or the
like.