ASTM D3044-16

Standard Test Method for Shear Modulus of Wood-Based Structural Panels

SIGNIFICANCE AND USE
4.1 This test method is most useful for determining the moduli of rigidity of orthotropic materials for which moduli of rigidity cannot be computed from elastic moduli and Poisson's ratios. The shear modulus determined by this method appears in the equation governing the bending of a plate. This is the modulus that is needed in discussing the deflection and buckling of plates.
Note 2: Test Methods D2718 describes a plate method for determination of modulus of rigidity of structural panels.
SCOPE
1.1 This test method covers determination of the shear modulus of wood-based structural panels associated with shear distortion in the plane of the panels. The method is applicable to all types of wood-based structural panels. The grain direction or orientation of the individual plies, laminations, or layers shall be parallel or perpendicular to the edge of the test specimen. If the plies, laminations, or layers are of different material or elastic properties, the method gives the effective shearing modulus. Wood-based structural panels in use include plywood, oriented strand board, and composites of veneer and of wood-based layers.  
Note 1: This test method is primarily designed for material in which the grain or orientation of the individual plies, laminations, or layers is parallel or perpendicular to the edge of the specimen. It may be used, however, for plywood specimens in which the grain is at 45° to the specimen edges if a four-ply panel with all plies of the same thickness is used. The controlling condition is that the EI (modulus of elasticity × moment of inertia) values along both diagonals shall be equal.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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.

General Information

• Status: Historical
• Publication Date: 31-May-2016
• ICS: 79.060.10 - Plywood
• Technical Committee: D07 - Wood
• Drafting Committee: D07.03 - Panel Products

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D3044 − 16
Standard Test Method for
1
Shear Modulus of Wood-Based Structural Panels
This standard is issued under the fixed designation D3044; 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.
1. Scope D4442 Test Methods for Direct Moisture Content Measure-
ment of Wood and Wood-Based Materials
1.1 This test method covers determination of the shear
modulus of wood-based structural panels associated with shear
3. Summary of Test Method
distortion in the plane of the panels. The method is applicable
to all types of wood-based structural panels. The grain direc-
3.1 The test consists of twisting a square plate of material by
tion or orientation of the individual plies, laminations, or layers
applying loads at the ends of one diagonal and supporting the
shall be parallel or perpendicular to the edge of the test
plate at the ends of the other diagonal. From theory on the
specimen. If the plies, laminations, or layers are of different
flexure of flat plates the deflections of the plate under this
material or elastic properties, the method gives the effective
loading is related to the shear modulus of the plate. Deflections
shearing modulus. Wood-based structural panels in use include
of the plate at points on the diagonal are measured relative to
plywood, oriented strand board, and composites of veneer and
its center. The shear modulus of the specimen is determined
of wood-based layers.
from load-deflection data. The shear modulus obtained is that
associated with shearing distortion in the plane of the plate. A
NOTE 1—This test method is primarily designed for material in which
photograph of testing apparatus and a deflection measuring
the grain or orientation of the individual plies, laminations, or layers is
parallel or perpendicular to the edge of the specimen. It may be used,
device is given in Fig. 1.
however, for plywood specimens in which the grain is at 45° to the
specimen edges if a four-ply panel with all plies of the same thickness is
4. Significance and Use
used. The controlling condition is that the EI (modulus of elastic-
ity × moment of inertia) values along both diagonals shall be equal.
4.1 This test method is most useful for determining the
1.2 The values stated in inch-pound units are to be regarded moduli of rigidity of orthotropic materials for which moduli of
as standard. The values given in parentheses are mathematical rigidity cannot be computed from elastic moduli and Poisson’s
conversions to SI units that are provided for information only ratios. The shear modulus determined by this method appears
and are not considered standard. in the equation governing the bending of a plate. This is the
modulus that is needed in discussing the deflection and
1.3 This standard does not purport to address all of the
buckling of plates.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
NOTE 2—Test Methods D2718 describes a plate method for determi-
priate safety and health practices and determine the applica-
nation of modulus of rigidity of structural panels.
bility of regulatory limitations prior to use.
5. Control of Moisture Content
2. Referenced Documents
5.1 The structural panel samples to be tested at specific
2
2.1 ASTM Standards:
moisture contents or equilibrium relative humidities shall be
D2395 Test Methods for Density and Specific Gravity (Rela-
conditioned to approximately constant mass in controlled
tive Density) of Wood and Wood-Based Materials
atmospheric conditions. For approximating moisture condi-
D2718 Test Methods for Structural Panels in Planar Shear
tions of panels used under dry conditions, a relative humidity
(Rolling Shear)
of 65 6 2 % at a temperature of 68 6 6°F (20 6 3°C) is
recommended. Specimens shall be tested without undue delay
1 after conditioning. Testing in similarly controlled atmosphere
This test method is under the jurisdiction of ASTM Committee D07 on Wood
is recommended whenever possible.
and is the direct responsibility of Subcommittee D07.03 on Panel Products.
Current edition approved June 1, 2016. Published July 2016. Originally approved
in 1972. Last previous edition approved in 2011 as D3044 – 94 (2011). DOI:
6. Test Specimen
10.1520/D3044-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1 The test specimen shall be square, with the thickness
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
equal to the thickness of the material, and the length and width
Standards volume information, refer to the standard’s
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D3044 − 94 (Reapproved 2011) D3044 − 16
Standard Test Method for
1
Shear Modulus of Wood-Based Structural Panels
This standard is issued under the fixed designation D3044; 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.
1. Scope
1.1 This test method covers determination of the shear modulus of wood-based structural panels associated with shear distortion
in the plane of the panels. The method is applicable to all types of wood-based structural panels. The grain direction or orientation
of the individual plies, laminations, or layers shall be parallel or perpendicular to the edge of the test specimen. If the plies,
laminations, or layers are of different material or elastic properties, the method gives the effective shearing modulus. Wood-based
structural panels in use include plywood, waferboard, oriented strand board, and composites of veneer and of wood-based layers.
NOTE 1—This test method is primarily designed for material in which the grain or orientation of the individual plies, laminations, or layers is parallel
or perpendicular to the edge of the specimen. It may be used, however, for plywood specimens in which the grain is at 45° to the specimen edges if a
four-ply panel with all plies of the same thickness is used. The controlling condition is that the EI (modulus of elasticity × moment of inertia) values along
both diagonals shall be equal.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
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
2.1 ASTM Standards:
D2395 Test Methods for Density and Specific Gravity (Relative Density) of Wood and Wood-Based Materials
D2718 Test Methods for Structural Panels in Planar Shear (Rolling Shear)
D4442 Test Methods for Direct Moisture Content Measurement of Wood and Wood-Based Materials
3. Summary of Test Method
3.1 The test consists of twisting a square plate of material by applying loads at the ends of one diagonal and supporting the plate
at the ends of the other diagonal. From theory on the flexure of flat plates the deflections of the plate under this loading is related
to the shear modulus of the plate. Deflections of the plate at points on the diagonal are measured relative to its center. The shear
modulus of the specimen is determined from load-deflection data. The shear modulus obtained is that associated with shearing
distortion in the plane of the plate. A photograph of testing apparatus and a deflection measuring device is given in Fig. 1.
4. Significance and Use
4.1 This test method is most useful for determining the moduli of rigidity of orthotropic materials for which moduli of rigidity
cannot be computed from elastic moduli and Poisson’s ratios. The shear modulus determined by this method appears in the
equation governing the bending of a plate. This is the modulus that is needed in discussing the deflection and buckling of plates.
NOTE 2—Test Methods D2718 describes a plate method for determination of modulus of rigidity of structural panels.
5. Control of Moisture Content
5.1 The structural panel samples to be tested at specific moisture contents or equilibrium relative humidities shall be conditioned
to approximately constant mass in controlled atmospheric conditions. For approximating moisture conditions of panels used under
1
This test method is under the jurisdiction of ASTM Committee D07 on Wood and is the direct responsibility of Subcommittee D07.03 on Panel Products.
Current edition approved Nov. 1, 2011June 1, 2016. Published November 2011July 2016. Originally approved in 1972. Last previous edition approved in 20002011 as
D3044 – 94 (2006).(2011). DOI: 10.1520/D3044-94R11.10.1520/D3044-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM webs
...