Astm D 3983 – 98 (Reapproved 2004) pdf free download

Standard Test Method for
Measuring Strength and Shear Modulus of Nonrigid
Adhesives by the Thick-Adherend Tensile-Lap Specimen1

This standard is issued under the fixed designation D 3983; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the 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 describes a method of measuring the
shear modulus and rupture stress in the shear of adhesives in
bonded joints. The method employs lap-shear specimens with
wood, metal, or composite adherents, with adhesives having
shear moduli ranging up to 700 MPa (100 000 psi). This test
method is suitable generally for joints in which the ratio of
adherend tensile modulus to adhesive shear modulus is greater
than 300 to 1. It is not suitable for adhesives that have a high
shear modulus in the cured state and that also require the elimination of volatile constituents during cure.

1.2 The values stated in SI units are to be regarded as
standard. The values given in parentheses are for information

1.3 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

2.1 ASTM Standards: 2
D 143 Test Methods for Small Clear Specimens of Timber
D 905 Test Method for Strength Properties of Adhesive
Bonds in Shear by Compression Loading
D 907 Terminology of Adhesives
D 1151 Practice for Effect of Moisture and Temperature on
Adhesive Bonds
D 2651 Guide for Preparation of Metal Surfaces for Adhesive Bonding
E 6 Terminology Relating to Methods of Mechanical Testing.

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