Strength of materials.

When a force, or a load, is appUed to a solid body it tends to change the shape of the body. When the applied force is removed the body wiUrestQrei^.ori^ria shape. This property of returning to their original shape is termed 'e^Mlate'.

Should the applied force be large enough, the resistance offeredbythematerial will be overcome and when the force is removed the body will no longer return to its original shape and will become permanently distorted.

The point at which the body ceases to be elastic and becomes рей^эде^у distorted is termed 'yield point' and the load which is applied to eausethis istffr '• 'yield point load*. The load is then said to have undergone 'plastic deformation or now*.

Whenever a change of dimensions of a body occurs a state of strain is set up in that body.

allowable stress bending

bending moment v elasticity

elastic deformation elastic limit elongation fatigue

fatigue stress fracture.rupture ductile fracture hardness loading "plasticity

rigidity, stiffness safety factor shear strength stress

stress concentrator tensile strength torsion yield point

допускаемое напряжение изгиб

'изгибающий момент упругость ^„зд,, упругая деформация предел упругости удлинение

усталость - Я сопротивление усталости разрушение вязкое разрушение твердость нагружение пластичность жесткость запас прочности сдвиг

прочность напряжение

концентратор напряжения предел прочности (растяж.) кручение предел текучести

с)

Spanners and pliers

a - diagonal cutting nipper and "alligator", pipe grip and spanner in one; b - combination pliers;

с - screwdrivers; d - spanners and ajustable wrenches

Hammers and chisels a - hammers; b - flat cold chisel and crosscut shisel

1 ________ 6

3 8

5__________

1. Combination Wrench 6. Ratchet Handle

2. Box End 7. Socket Extension

3. Ratchet Box End 8. Standard Socket

4. Hinged Offset Socket Handle (Breaker Bar) 9. Impact Socket

5. Speeder Handle 10. Universal Socket

SOCET EXTENSIONS

UNIVERSAL JOINT

' Allows access to a bolt from an angle. Ideal for use in confined areas where direct access is impossible.

SOCKET EXTENSION.

Allows the tightening of a bolt in a recessed area. Extensions are available in any of the various drive sizes (1/4", 3/8", etc).

Wrench to provide required mechanical leverage to hold, twist or turn an object such as a nut or bolt

Sockets and key sets

Clamp and pressure gauge Multy-meter

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