ASTM D4093-95(2001)e1
Historical Standard: ASTM D4093-95(2001)e1 Standard Test Method for Photoelastic Measurements of Birefringence and Residual Strains in Transparent or Translucent Plastic Materials
SUPERSEDED (see Active link, below)
ASTM D4093
1. Scope
1.1 This test method covers measurements of direction of principal strains, E 1 and E 2 , and the photoelastic retardation, [delta], using a compensator, for the purpose of analyzing strains in transparent or translucent plastic materials. The test method can be used to determine the difference of principal strains or normal strains when the principal directions do not change substantially within the light path.
1.2 In addition to the method using a compensator described in this test method, other methods are in use, such as the goniometric method (using rotation of the analyzer) mostly applied for measuring small retardation, and expressing it as a fraction of a wavelength. Nonvisual methods employing photoelectric conversion and eliminating the human judgement factor are also possible.
1.3 Test data obtained by this test method is relevant and appropriate for use in engineering design.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D618 Practice for Conditioning Plastics for Testing
D638 Test Method for Tensile Properties of Plastics
D882 Test Method for Tensile Properties of Thin Plastic Sheeting
D4000 Classification System for Specifying Plastic Materials
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Keywords
birefringence; photoelastic measurements; photoelastic retardation; strain; strain-optical constant; transparent plastics; Birefringence; Color--plastics; Deformation--plastics; Light transmission and reflection; Photoelastic measurement; Plastic sheet and film; Polariscopic examination; Reflectance and reflectivity; Refractive index; Residual strains; Retardation; Strain testing--plastics; Stress--plastics; Transparent plastics;
ICS Code
ICS Number Code 83.080.01 (Plast in general)
DOI: 10.1520/D4093-95R01E01
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