Chapter 4 - Compressive Properties

Define Compressive properties

• Utilizing two load

  points equally spaced from their adjacent

  support points, with a distance between load

  points of one third of the support span

• The ability of the

  material to withstand bending forces

  applied perpendicular to its longitudinal

  axis

• Behaviour of a material when it is subjected to a compressive load at a relatively low and uniform rate of loading

• Measurement of the

  ability of material to withstand forces

  that tend to pull it apart and

Which figure best describe for a "cracked specimen" of compressive test?

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The results of _________ , Creep and ___________ test must be considered while designing such a part of compressive.

• Flexural, impact

• Fatigue, tensile

• Impact, compressive

• Impact, fatigue

Name the apparatus that can be used to measure any change in distancebetween two fixed points on the test specimen at any time during the test strength of various materials in compression test.

Choose TWO (2) answer.

• Compresssometer

• Extensometer

• Deflectometer

• Thermometer

State the function for this component in compressive testing.

• Concentric rings on anvil

• To place for Lock nut to eliminate backflash

• As option and accessory to UTM

• To provide load for sample before compression

State ONE (1) advantage of Compressive Test.

• Data will experience some scatter, therefore multiple test

  are required

• Not useful

  for brittle materials experiencing load

• Sample preparation can affect

  results

• Flexibility in sample configuration

Which are NOT the compressive test parameter?

• Compressive strain

• Compressive modulus

• Ultimate Tensile strength

• Compressive yield strength

Which ASTM code can be used for rigid compressive test samples?

• D695

• D618

• D638

• D790

Which stress strain curve can best to describe for compressive curve trend of most plastic material?

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When the temperature of sample increase, the compressive strength become ________.

• Decrease

• Increase

• No change

• Fluctuation with increase and decrease