Copy of `Testometric  Materials testing terms`
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Testometric  Materials testing terms
Category: General technical and industrial > Materials testing
Date & country: 17/11/2007, UK Words: 69

Audit TrailA stepbystep record by which data can be traced to its source.
Auto ReturnAutomatically returns the crosshead to the original start position at the end of each test.
AutoscaleAutoscaling may be set individually on the x or y axis to resize the graph screen automatically.
Auxiliary DeviceAuxiliary Devices are devices that are attached to either the PC running winTest Solutions, or the tester. Such devices are Extensometers, Balances, Thickness Gauges etc. These devices usually connect via a serial or USB lead.
BalanceAn instrument for measuring the specimen weight.
BreadthThe measure or dimension from side to side.
CircumferenceThe line that goes round or encompasses a circular object.
Coefficient VariationFor a set of data, the coefficient of variation is
Comm PortCommunication interface connection usually a serial port on a PC often referred to as COM1, COM 2 etc..
CompressionA force tending to compress or reduce something.
Compression TestingMethod for determining behavior of samples under a crushing or compressive force.
CreepDeformation that occurs over time when a material is subjected to constant stress at a constant temperature.
CrossheadThe main beam across the testing machine. This beam moves either up or down at variable speeds producing a tensile or compressive force.
DeflectionThe movement of a structure or structural part as a result of stress.
DiameterThe length of a straight line passing through the centre of a circle and connecting two points on the circumference of the sample.
DistanceThe property created by the space between two objects or points.
DistensionThe act of expanding by pressure from within.
Elastic LimitThe limit of distortion, by bending, stretching, etc., that a body can undergo and yet return to its original form when relieved from stress.
ElasticityThe ability of a strained material to recover its original size and shape immediately after removal of the stress that causes deformation.
ElongationThe deformation in the direction of load caused by a tensile force.
EnergyA measurement of the work done on a specimen during a test. The energy expended between any two points in a test is measured as the area under the stress/strain curve.
ExtensionThe location of the crosshead/extensometer relative to the point where the gauge length is reset.
ExtensometerAn instrument or device used to measure deformation in a test specimen of a material.
ForceThe capacity to cause physical change.
Gauge LengthGauge length is the original length of the sample of which extension calculations are made. Normally less than the full specimen length and is user defined. The gauge length is sometimes taken as the distance between the grips.
GripsA mechanical device that grasps and holds the test specimen.
Hasp KeyA device to activate the software and is usually connected to the printer (parallel) port or USB port.
ImperialThe standards legalised by the British Parliament.
Initial Peak ForceThe initial peak force is the first point at which distance increases and force decreases.
Inner DiameterThe length of a straight line passing through the centre of a circle and connecting two points on the inner circumference of sample.
JogA button on the control panel that moves the crosshead up or down manually. Used to manually position the crosshead prior to testing as a quick method to grip or position a test specimen.
Linear DensityLinear density is a measure of mass per unit length.
Load CellA transducer which converts a value of force into an electrical signal.
LOPLimit of Proportionality is the force at the point on a stress/strain curve where the strain is no longer proportional to the stress.
Major SpanDistance between supports on 4 point bend.
Maximum ForceThe point of highest force (Fm).
MeanA way of finding the 'middle' of a set of data; the ordinary or 'arithmetic' meanis found by adding up all the values and dividing the total by the number of values.
Mean ForceThe sum of all force data divided by the number of data points.
MedianThe median of a set of data is one way of finding the 'middle' of the data. To findthe median, put all the data in a list in order of size, and pick the piece of datawhich is half way through the list. If there is an even number of values, the medianis half way between the middle pair of values.
MetricOf or pertaining to the metre as a standard of measurement; of or pertaining to the decimal system of measurement of which a metre is the unit; as, the metric system; a metric measurement.
Minor SpanDistance between loading points on 4 point bend.
Outer DiameterThe length of a straight line passing through the centre of a circle and connecting two points on the outter circumference of sample.
PeakHighest point or maximum value.
Peak ForceThe point of maximum force (Fm).
PreloadPreload is a user defined force that is applied to the specimen before any measurements begin.
PretensionPretension is used in tensile tests and is a user defined force that is applied to the specimen before any measurements begin.
Reel CircumferenceThe line that goes round or encompasses a reel.
Sample BreakThe point at with the sample breaks or fractures.
Sample Break DetectionThe Sample Break Detection function measures the rate of decrease in force during a test and when triggered will stop the crosshead. Range
Sample HeightSample Height is the original height of the sample of which deflection calculations are made.
SBDThe Sample Break Detection function measures the rate of decrease in force during a test and when triggered will stop the crosshead. Range
SISystème International [d'Unités] (International System [of Units]).
Sled WeightMass of the sled.
SpanThe extent or measure of space between two points or extremities.
StageAn event at the beginning, during or end of the test.
Standard DeviationThe standard deviation is also called the root mean square deviation, because it can be found by computing the deviation of each piece of data from the mean, squaring each of these deviations, finding the mean of them and then taking the square root of the mean.
StrainTo alter (the relations between the parts of a structure or shape) by applying an external force.
StressAn applied force divided by original cross sectional area of the specimen.
Tensile StrengthUltimate strength of a material subjected to tensile loading. It is the maximum stress developed in a material during a tensile test.
TensionA force tending to stretch or elongate a sample or material.
Test DefinitionOutlines the test methods including calculations, variables etc.
Test HeightThe distance from the base of the sample to the top of the sample.
Test TypeExamples of test types include Tension, Compression, Burst, Peel, 3 Point Flexural, Paper, Seam, Yarn Tear and Friction.
ThicknessThe dimension between two surfaces of an object, usually the dimension of smallest measure.
Thickness GaugesAn instrument for measuring the specimen thickness.
TurnsThe number of turns about its axis per unit of length of a yarn or other textile strand. Twist may be expressed as turns per inch (tpi), turns per metre (tpm), or turns per centimetre (tpcm).
USBUniversal Serial Bus. An interface available on modern PCs.
VariablesUser defined variables that can be used to collect extra information from the user that is not directly generated by the tester.
Yield PointThe point at which the strain increases without the associated increase in stress. Only a few materials (eg steel) have a yield point and generally only under tensile forces.