ASTM E756-05

Standard Test Method for Measuring Vibration-Damping Properties of Materials

SCOPE
1.1 This test method measures the vibration-damping properties of materials: the loss factor, η, and Young's modulus, E, or the shear modulus, G. Accurate over a frequency range of 50 to 5000 Hz and over the useful temperature range of the material, this method is useful in testing materials that have application in structural vibration, building acoustics, and the control of audible noise. Such materials include metals, enamels, ceramics, rubbers, plastics, reinforced epoxy matrices, and woods that can be formed to cantilever beam test specimen configurations.
1.2 This standard does not purport to address all 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: 30-Sep-2005
• Technical Committee: E33 - Building and Environmental Acoustics
• Drafting Committee: E33.03 - Sound Transmission

Relations

• Replaces: ASTM E756-04e1 - Standard Test Method for Measuring Vibration-Damping Properties of Materials
• Effective Date: 01-Oct-2005
• Replaced By: ASTM E756-05(2010) - Standard Test Method for Measuring Vibration-Damping Properties of Materials
• Effective Date: 01-May-2010
• Referred By: ASTM E2963-22 - Standard Test Method for Laboratory Measurement of Acoustical Effectiveness of Ship Noise Treatments Laboratory Measurement of Acoustical Effectiveness for Marine Bulkhead and Deck Treatments
• Effective Date: 01-Oct-2005
• Referred By: ASTM C634-22 - Standard Terminology Relating to Building and Environmental Acoustics
• Effective Date: 01-Oct-2005

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:E756–05
Standard Test Method for
1
Measuring Vibration-Damping Properties of Materials
This standard is issued under the fixed designation E756; 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.
1. Scope material to the structure’s surface so that energy is dissipated
through cyclic deformation of the damping material, primarily
1.1 This test method measures the vibration-damping prop-
in tension-compression.
erties of materials: the loss factor, h, andYoung’s modulus, E,
3.1.2 constrained-layer (shear) damper—a treatment to
ortheshearmodulus, G.Accurateoverafrequencyrangeof50
control the vibration of a structure by bonding a layer of
to 5000 Hz and over the useful temperature range of the
damping material between the structure’s surface and an
material, this method is useful in testing materials that have
additional elastic layer (that is, the constraining layer), whose
application in structural vibration, building acoustics, and the
relativestiffnessisgreaterthanthatofthedampingmaterial,so
control of audible noise. Such materials include metals, enam-
that energy is dissipated through cyclic deformation of the
els, ceramics, rubbers, plastics, reinforced epoxy matrices, and
damping material, primarily in shear.
woods that can be formed to cantilever beam test specimen
3.2 Definitions of Terms Specific to This Standard:
configurations.
3.2.1 glassy region of a damping material—a temperature
1.2 This standard does not purport to address all the safety
region where a damping material is characterized by a rela-
concerns, if any, associated with its use. It is the responsibility
tively high modulus and a loss factor that increases from
of the user of this standard to establish appropriate safety and
extremely low to moderate as temperature increases (see Fig.
health practices and determine the applicability of regulatory
1).
limitations prior to use.
3.2.2 rubbery region of a damping material—a temperature
2. Referenced Documents region where a damping material is characterized by a rela-
2
tively low modulus and a loss factor that decreases from
2.1 ASTM Standard:
moderate to low as temperature increases (see Fig. 1).
E548 Guide for General Criteria Used for Evaluating Labo-
3.2.3 transition region of a damping material—a tempera-
ratory Competence
ture region between the glassy region and the rubbery region
2.2 ANSI Standard:
where a damping material is characterized by the loss factor
S2.9 Nomenclature for Specifying Damping Properties of
3
passing through a maximum and the modulus rapidly decreas-
Materials
ing as temperature increases (see Fig. 1).
3. Terminology
3.3 Symbols—The symbols used in the development of the
equations in this method are as follows (other symbols will be
3.1 Definitions—Except for the terms listed below, ANSI
introduced and defined more conveniently in the text):
S2.9 defines the terms used in this test method.
3.1.1 free-layer (extensional) damper—a treatment to con-
trol the vibration of a structural by bonding a layer of damping
E = Young’s modulus of uniform beam, Pa
h = loss factor of uniform beam, dimensionless
1 E = Young’s modulus of damping material, Pa
ThistestmethodisunderthejurisdictionofASTMCommitteeE33onBuilding 1
h = loss factor of damping material, dimensionless
and Environmental Acoustics and is the direct responsibility of Subcommittee
1
E33.03 on Sound Transmission.
G = shear modulus of damping material, Pa
1
Current edition approved Oct. 1, 2005. Published October 2005. Originally
´1
approved in 1980. Last previous edition approved in 2004 as E756–04 . DOI:
4. Summary of Method
10.1520/E0756-05.
2
4.1 The configuration of the cantilever beam test specimen
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
is selected based on the type of damping material to be tested
Standards volume information, refer to the standard’s Document Summary page on
and the damping properties that are desired. Fig. 2 shows four
the ASTM website.
3
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E756–05
tests (see Section 10.2.1), and the results of the composite
beam tests (see Sections 10.2.2 and 10.2.3).
4.1.3 The process to obtain the shear damping properties
...