ASTM D2094-00(2023)
(Practice)Standard Practice for Preparation of Bar and Rod Specimens for Adhesion Tests
Standard Practice for Preparation of Bar and Rod Specimens for Adhesion Tests
SIGNIFICANCE AND USE
4.1 The procedures outlined in this practice are designed to standardize the test specimens, surface preparations, combinations of materials, and adhesive selection. Because of the flexibility in the procedure, it is important to have some idea of the kind of properties that will be observed during testing.
SCOPE
1.1 This practice describes bar- and rod-type butt-joined adhesion test specimens and procedures for preparing and bonding them. The specimens are intended to be used with various adherend materials in like or unlike combinations for determining the strength properties of adhesives in accordance with Test Method D2095.
1.2 The values stated in SI units are considered to be the standard. The values in parentheses are for information only.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D2094 − 00 (Reapproved 2023)
Standard Practice for
Preparation of Bar and Rod Specimens for Adhesion Tests
This standard is issued under the fixed designation D2094; 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 2.2 ASTM Adjuncts:
Alignment Fixture Drawings
1.1 This practice describes bar- and rod-type butt-joined
adhesion test specimens and procedures for preparing and
3. Terminology
bonding them. The specimens are intended to be used with
3.1 Definitions—Many terms in this practice are defined in
various adherend materials in like or unlike combinations for
Terminology D907.
determining the strength properties of adhesives in accordance
with Test Method D2095.
4. Significance and Use
1.2 The values stated in SI units are considered to be the
4.1 The procedures outlined in this practice are designed to
standard. The values in parentheses are for information only.
standardize the test specimens, surface preparations, combina-
1.3 This standard does not purport to address all of the
tions of materials, and adhesive selection. Because of the
safety concerns, if any, associated with its use. It is the
flexibility in the procedure, it is important to have some idea of
responsibility of the user of this standard to establish appro-
the kind of properties that will be observed during testing.
priate safety, health, and environmental practices and deter-
5. Test Specimens
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
5.1 Geometry—Test specimens conform to the forms and
dance with internationally recognized principles on standard-
dimensions shown in Fig. 1, Fig. 2,or Fig. 3. Only the bar
ization established in the Decision on Principles for the
specimen (Fig. 1) shall be used for cleavage strength tests.
Development of International Standards, Guides and Recom-
Only the rod specimen (Fig. 2) or the modified bar specimen
mendations issued by the World Trade Organization Technical
(Fig. 3) shall be used for tests in torsional shear.Amodification
Barriers to Trade (TBT) Committee.
of the specimen is permissible in tensile tests with dissimilar
adherends, particularly if one of the adherend materials is
2. Referenced Documents
difficulttomachine(forexample,glass)orifthestrengthofthe
2.1 ASTM Standards:
adherend is such that failure under stress occurs at the drilled
D907 Terminology of Adhesives
hole. This modification consists of a sheet of the material
3 1 1
D2093 Practice for Preparation of Surfaces of Plastics Prior
approximately 19 mm ( ⁄4 in.) square and 1 ⁄2to6mm( ⁄16 to
to Adhesive Bonding
⁄4 in.) thick inserted and bonded between the ends of the bar or
D2095 Test Method for Tensile Strength of Adhesives by
rod specimens. For comparison purposes, specimen geometry
Means of Bar and Rod Specimens
shall be the same unless the effect of insert dimensions is under
D2651 GuideforPreparationofMetalSurfacesforAdhesive
study.
Bonding
5.2 Machining of Adherends:
5.2.1 Use metal adherends machined from bar or rod stock
This practice is under the jurisdiction of ASTM Committee D14 on Adhesives
with the surface to be bonded finished to 1 µm.
and is the direct responsibility of Subcommittee D14.80 on Metal Bonding
5.2.2 Machine plastic from laminated flat panels using a
Adhesives.
diamond charged wheel for rough machining and a carbide-
Current edition approved Jan. 1, 2023. Published January 2023. Originally
approved in 1962. Last previous edition approved in 2014 as D2094 – 00 (2014). tipped tool for finish machining. Do all machining dry using
DOI: 10.1520/D2094-00R23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Detailed working drawings of the fixtures shown in Fig. 4 and Fig. 5 and their
Standards volume information, refer to the standard’s Document Summary page on parts are available from ASTM International Headquarters. Order Adjunct No.
the ASTM website. ADJD2094. Original adjunct produced in 1966.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D2094 − 00 (2023)
Machining Requirements:
(1) Two adjacent sides shall be ground so that included angle is 90° 6 7 min.
(2) Ends shall be ground perpendicular to the ground sides so that included angle is 90° 6 7 min.
(3) Drilled hole shall be perpendicular to one ground side so that included angle is 90° 6 7 min.
(4) Drilled hole shall always be in the same relative position to the ground surfaces as shown on drawing.
FIG. 1 Bar Specimen
NOTE 1—Ends of specimen and hole shall be perpendicular to the axis within 67 min.
FIG. 2 Rod Specimen
care not to damage surfaces by overheating or contamination 5.3.2 The minimum acce
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