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ASTM D638 - 99
Standard Test Method for Tensile Properties of Plastics
| Fecha edición: |
2002-04-10
Anulada
|
|---|---|
| Fecha cancelación: | 2002-04-10 |
| Idiomas disponibles: | Inglés |
| Resumen: | |
| Keywords: | modulus of elasticity; percent elongation; plastics; tensile properties; tensile strength |
| Scope: | 1.1 This test method covers the determination of the tensile properties of unreinforced and reinforced plastics in the form of standard dumbbell-shaped test specimens when tested under defined conditions of pretreatment, temperature, humidity, and testing machine speed. 1.2 This test method can be used for testing materials of any thickness up to 14 mm (0.55 in.). However, for testing specimens in the form of thin sheeting, including film less than 1.0 mm (0.04 in.) in thickness, Test Methods D882 is the preferred test method. Materials with a thickness greater than 14 mm (0.55 in.) must be reduced by machining. 1.3 This test method includes the option of determining Poisson's ratio at room temperature. Note 1—This test method and ISO 527-1 are technically equivalent.Note 2—This test method is not intended to cover precise physical procedures. It is recognized that the constant rate of crosshead movement type of test leaves much to be desired from a theoretical standpoint, that wide differences may exist between rate of crosshead movement and rate of strain between gage marks on the specimen, and that the testing speeds specified disguise important effects characteristic of materials in the plastic state. Further, it is realized that variations in the thicknesses of test specimens, which are permitted by these procedures, produce variations in the surface-volume ratios of such specimens, and that these variations may influence the test results. Hence, where directly comparable results are desired, all samples should be of equal thickness. Special additional tests should be used where more precise physical data are needed. Note 3—This test method may be used for testing phenolic molded resin or laminated materials. However, where these materials are used as electrical insulation, such materials should be tested in accordance with Test Methods D229 and Test Method 651. Note 4—For tensile properties of resin-matrix composites reinforced with oriented continuous or discontinuous high modulus >20-GPa (>3.0 106-psi) fibers, tests shall be made in accordance with Test Method D3039/D3039M. 1.4 Test data obtained by this test method are relevant and appropriate for use in engineering design. 1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.6 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. |
| ICS: | 83.080.01 - Plásticos en general |
| CTN: | D20.10 - D20.10 |
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Otras Relaciones |
Es referenciada por D6456-10R18 Es referenciada por D7791-22 Es referenciada por D3826-18 Es referenciada por F0450-13R19 Es referenciada por D4020-18 Es referenciada por D2633-21 Es referenciada por D1039-16R22 Es referenciada por D4434_D4434M-21 Es referenciada por D4976-12AR20 Es referenciada por D5592-94R18 Es referenciada por D0882-18 Es referenciada por D0229-19E01 Es referenciada por D7275-07R18 Es referenciada por D7027-20 Es referenciada por D0790-17 Es referenciada por D8318-20 Es referenciada por D3935-21 Es referenciada por D2990-17 Es referenciada por D4097-19 Es referenciada por D4067-23 |










