E-1922.pdf - Designation E 1922 \u2013 97 AMERICAN SOCIETY FOR TESTING AND MATERIALS 100 Barr Harbor Dr West Conshohocken PA 19428 Reprinted from the

E-1922.pdf - Designation E 1922 – 97 AMERICAN SOCIETY FOR...

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Designation: E 1922 – 97 Standard Test Method for Translaminar Fracture Toughness of Laminated Polymer Matrix Composite Materials 1 This standard is issued under the fixed designation E 1922; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon ( e ) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 This test method covers the determination of translami- nar fracture toughness, K TL , for laminated polymer matrix composite materials of various ply orientations using test results from monotonically loaded notched specimens. 1.2 This test method is applicable to room temperature laboratory air environments. 1.3 Composite materials that can be tested by this test method are not limited by thickness or by type of polymer matrix or fiber, provided that the specimen sizes and the test results meet the requirements of this test method. This test method was developed primarily from test results of various carbon fiber – epoxy matrix laminates and from additional results of glass fiber – epoxy matrix and carbon fiber – bismaleimide matrix laminates (1-4) . 2 1.4 A range of eccentrically loaded, single-edge-notch ten- sion, ESE(T), specimen sizes with proportional planar dimen- sions is provided, but planar size may be variable and adjusted, with associated changes in the applied test load. Specimen thickness is a variable, independent of planar size. 1.5 Specimen configurations other than those contained in this test method may be used, provided that stress intensity calibrations are available and that the test results meet the requirements of this test method. It is particularly important that the requirements discussed in 5.1 and 5.4 regarding contained notch-tip damage be met when using alternative specimen configurations. 1.6 Values stated in SI units are to be regarded as the standard. 1.7 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 appro- priate safety and health practices and to determine the applicability of regulatory limitations prior to use. 2. Referenced Documents 2.1 ASTM Standards: D 883 Terminology Relating to Plastics 3 D 3039 Test Method for Tensile Properties of Polymer Matrix Composite Materials 4 D 3878 Terminology of High-Modulus Reinforcing Fibers and their Composites 4 D 5229 Test Method for Moisture Adsorption Properties and Equilibrium Conditioning of Polymer Matrix Com- posite Materials 4 D 5528 Test Method for Mode I Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Matrix Composites 4 E 4 Practices for Force Verification of Testing Machines 5 E 6 Terminology Relating to Methods of Mechanical Test- ing 5 E 83 Practice for Verification and Classification of Exten- someters 5 E 399 Test Method for Plane-Strain Fracture Toughness of Metallic Materials 5
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