 |
| Purchase Information |
| Use this form to request purchase information on ASTM online subscriptions. |
|
|
Document ASTM D 2719 is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.
You may also purchase this document alone from the IHS Standards Store.
ASTM D 2719 Document Information:
Title
Standard Test Methods for Structural Panels in Shear Through-the-Thickness
ASTM International
Publication Date:
Aug 25, 1989
Scope:
These test methods determine the shear through-the-thickness
properties of structural panels associated with shear distortion of
the major axis. Structural panels in use include plywood, wafer
board, oriented strand board, and composites of veneer and of wood
based layers. Three test methods are included which differ somewhat
in their application:
The choice of test method will be determined in part by the
purpose of the tests, characteristics of test material, and
equipment availability. In general, Test Method B or C for large
specimens is preferred when equipment, amount of test material, and
experimental plan permit.
Test Method A: Small Panel Shear Test—This test method
is suitable for testing small samples of uniform material including
investigations of the effects of grain direction or orientation and
of many raw materials and manufacturing process variables which
influence shear properties uniformly throughout the specimen. The
test method is unsuited for determining effects of grade and
manufacturing features such as density variations, knots, and core
gaps within the specimen.
Test Method B: Large Panel Shear Test—This test method
is regarded as giving the most accurate modulus of rigidity and is
therefore recommended for elastic tests of materials to be used in
stress analysis studies of test structures. This test method also
yields excellent shear strength values for clear material. However,
in spite of the large size of the specimen, failures generally
occur only in narrow zones at the perimeter of the test area. This
characteristic, a result of the heavy perimeter framing, causes
this test method to be generally unsuited for determining grade and
manufacturing effects such as density variations, core gaps, and
knots that are not uniformly distributed throughout the panel.
Generally, only in cases where effects of these factors under
conditions of heavy perimeter framing are desired, should the test
method be applied.
Test Method C: Two-Rail Shear Test—This test method is
applicable to a wide variety of materials and problems. The
specimen fabrication and test procedures are somewhat simpler than
in Test Methods Aand B. The specimen is free to shear parallel to
its 24-in.( 610-mm) length dimension anywhere within the 8-in.
(203-mm) width between rails. Thus, the test method is well suited
for determining grade and manufacturing effects such as core gaps
and knots occupying and affecting small areas. The test method is
not so ideally suited for determination of modulus of rigidity, but
when adjusted for strain distribution effects, values approximating
those obtained by Test Method B result. The test method simulates
effects of heavy framing when expected planes of weakness are
oriented perpendicular to rails and no framing at all when parallel
to rails.
Significant differences, moderate to small in magnitude, among
the three test methods have been found to exist when these test
methods are applied to plywood of clear straight-grained veneers.
Therefore, when comparisons are made among test results, it is
recommended that the same test method be used throughout.
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.
Keywords:
- shear
- shear test
- shear through-the-thickness
- structural panels
About IHS
IHS (NYSE: IHS) is a leading global provider of critical technical information, decision-support tools and related services in a number of industries including aerospace and defense, automotive, construction, electronics, and energy. IHS serves customers ranging from large governments and multinational corporations to smaller companies and technical professionals in more than 100 countries. IHS been in business for more than 45 years and employ more than 2,300 people around the world.
