TENSILE TESTING MACHINE TESTS

The test consists of subjecting a test piece to a tensile pull which is increased until failure occurs. A beam carried a sliding weight. The arm is balanced on a fulcrum by hydraulic pressure. As W is gradually moved out and the beam tends to fall, the hydraulic pressure stabilises it. An extensometer is fitted to a predetermined gauge length on the specimen. As the load increases the extension can be found from the extensometer. Note that the extensometer is usually only used within the elastic limit and the extensometer should be removed before the elastic limit is reached to prevent damage.

The results usually recorded are:-

(i) Ultimate Tensile Strength (UTS) =

Maximum Load

Original C S A

(II) Elongation as a percentage of stated test piece length.

Readings are for comparison purposes only.

tensile_testing_machine test

Related Terms

TRY VALVES

Test valves on a water column used to verify the water level when the gauge glass is out of service.

water_column level water_level water gauge_glass test try_valves valves

POPOV'S STABILITY CRITERION

A frequency domain stability test for systems consisting of a linear component described by a transfer function preceded by a nonlinear component characterized by an input-output function), with a unity gain feedback loop surrounding the series connection.

popov's_stability_criterion test feedback_loop gain loop frequency frequency_domain stability transfer domain linear

PLUG GAGE

A steel gage that is used to test the dimension of a hole; may be straight or tapered, plain or threaded, and of any crosssectional shape.

plug_gage dimension test may gage plain

PILOT-SCALE CHEMICAL REACTION

Small-scale chemical reaction used to test operating conditions and product yields; used as a pilot for design of large-scale reaction systems.

pilot-scale_chemical_reaction test product chemical pilot design conditions chemical_reaction

PERMAFROST DRILLING

Boreholes drilled in 397 permeameter permeate in a test specimen of ferromagnetic material by a given magnetic intensity, to permit computation of the magnetic permeability of the material.

permafrost_drilling magnetic test permeate permeameter material permeability ferromagnetic_material

PERMANENT SET

Permanent plastic deformation of a structure or a test piece after removal of the applied load. Also known as set.

permanent_set test plastic_deformation plastic deformation structure

PENETRATION SPEED

The speed at which a drill can cut through rock or other material. penetration test

penetration_speed speed penetration test cut drill can rock

PENETRATION DEPTH

1. In induction heating, the thickness of a layer, extending inward from a conductor's surface, whose resistance to direct current equals the resistance of the whole conductor to alternating current of a given frequency. 2. The greatest depth in an ultrasonic test piece at which indications can be measured.

penetration_depth alternating test current depth alternating_current greatest induction direct_current can thickness

PEG COUNT METER

A meter or register that counts the number of trunks tested, the number of circuits passed busy, the number of test failures, or the number of repeat tests completed.

peg_count_meter test number meter

PEEL TEST

A test to ascertain the adhesive strength of bonded strips of metals by peeling or pulling the metal strips back and recording the adherence values.

peel_test bonded test strength back adhesive_strength metal

Related Terms

Related questions