You are on page 1of 4 Search inside document Standard Test Method for Tear Resistance Graves Tear of Plastic Film and Sheeting1 This standard is issued under the fixed designation D ; 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 indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. The specimen geometry of this test rials method produces a stress concentration in a small area of the D Test Methods for Physical Dimensions of Solid specimen.
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More D The specimen geometry and speed of testing in this test method are controlled to produce tearing in a small area of stress concentration at rates far below those usually encountered in service. Experience has shown the test to have its best reliability for materials which do not have brittle failure or do not elongate greater than two hundred percent during testing. Actual use performance in tearing of some plastics may not necessarily correlate with data from this test method.
Hence, tearing forces measured in newtons or pounds-force cannot be normalized over a wide range of specimen thickness without producing misleading data as to the actual tearing resistance of the material. Therefore, the tearing resistance is expressed in maximum newtons or pounds-force of force to tear the specimen.
Therefore, it is advisable to refer to that material specification before using this test method. Scope 1. The specimen geometry of this test method produces a stress concentration in a small area of the specimen. The maximum stress, usually found near the onset of tearing, is recorded as the tear resistance in newtons or pounds-force. The method is not applicable for film or sheeting material where brittle failures occur during testing or where maximum extension is greater than In most cases, comparison between films of dissimilar thickness is not valid.
Note 1—Film has been arbitrarily defined as sheeting having nominal thickness not greater than 0. The values given in parentheses are provided for information only. 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. Note 2—There is no known ISO equivalent to this standard.
ASTM D-1004 Initial Tear Resistance Specimen Die
Want this as a site license? Changes from the previous issue A redline edition is available for this document, with all changes visible. Ask Document Center Inc. Scope 1. The specimen geometry of this test method produces a stress concentration in a small area of the specimen. The maximum stress, usually found near the onset of tearing, is recorded as the tear resistance in newtons or pounds-force. The method is not applicable for film or sheeting material where brittle failures occur during testing or where maximum extension is greater than
Tear Resistance ASTM D1004