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ASTM D2291-98

(Practice)

Standard Practice for Fabrication of Ring Test Specimens for Glass-Resin Composites

Standard Practice for Fabrication of Ring Test Specimens for Glass-Resin Composites

SCOPE
1.1 This practice is intended for use in the fabrication of ring-type test specimens to be used in the evaluation of the mechanical properties of reinforcement and resins in a composite structure. The practice outlines the steps in the preparation of the test specimens, including the final specimen machining where applicable. Four final ring configurations are included.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are given 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 and health practices and determine the applicability of regulatory limitations prior to use.  
Note 1-There is no ISO equivalent to this standard.

General Information

Status
Historical
Publication Date
09-Jul-1998
ICS
83.120 - Reinforced plastics
Technical Committee
D20 - Plastics
Drafting Committee
D20.18 - Reinforced Thermosetting Plastics
Current Stage
Ref Project

Relations

Replaced By
ASTM D2291-03 - Standard Practice for Fabrication of Ring Test Specimens for Glass-Resin Composites
Effective Date
01-Nov-2003
Referred By
ASTM D7745-19 - Standard Practice for Testing Pultruded Composites
Effective Date
10-Jul-1998

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ASTM D2291-98 - Standard Practice for Fabrication of Ring Test Specimens for Glass-Resin CompositesASTM D2291-98 - Standard Practice for Fabrication of Ring Test Specimens for Glass-Resin Composites
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ASTM D2291-98 - Standard Practice for Fabrication of Ring Test Specimens for Glass-Resin Composites
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 2291 – 98
Standard Practice for
Fabrication of Ring Test Specimens for Glass-Resin
Composites
This standard is issued under the fixed designation D 2291; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope * specimens. Specimens so prepared can be used in Test Methods
D 2290 and in D 2344.
1.1 This practice is intended for use in the fabrication of
ring-type test specimens to be used in the evaluation of the
5. Apparatus
mechanical properties of reinforcement and resins in a com-
5.1 Winding Machine—The winding machine may consist
posite structure. The practice outlines the steps in the prepara-
of any adequate superstructure for mounting impregnated
tion of the test specimens, including the final specimen
reinforcement or components for application of resin to the
machining where applicable. Four final ring configurations are
reinforcement, tensioning the reinforcement, and collecting the
included.
wetted, tensioned material on a mold or mandrel of the desired
1.2 The values stated in inch-pound units are to be regarded
size.
as the standard. The values in parentheses are given for
5.2 Tension Measuring System—Any device suitable for
information only.
measurement of the tension applied to the wetted reinforce-
1.3 This standard does not purport to address all of the
ment. The device shall be capable of measuring the tension
safety concerns, if any, associated with its use. It is the
accurately to within 65%.
responsibility of the user of this standard to establish appro-
5.3 The single-ring fabrication mold on which the wetted
priate safety and health practices and determine the applica-
reinforcement is collected shall be constructed as shown in Fig.
bility of regulatory limitations prior to use.
1. For cylinder fabrication from which rings are to be cut, a
NOTE 1—There is no ISO equivalent to this standard.
mandrel with the proper diameter fitted to a suitable winding
machine shall be used to collect the wetted reinforcement. The
2. Referenced Documents
surfaces of the mold or mandrel that contact the ring specimens
2.1 ASTM Standards:
shall be coated or otherwise treated to prevent sticking of the
D 618 Practice for Conditioning Plastics and Electrical
ring or cylinder in the mold or on the mandrel.
Insulating Materials for Testing
5.4 Curing Ovens—Ovens having adequate range in tem-
D 2290 Test Method for Apparent Tensile Strength of Ring
perature to produce a fully cured specimen shall be available
or Tubular Plastics and Reinforced Plastics by Split Disk
for use. Control of the curing-postcuring temperatures to
Method
within 69°F (65°C) is required.
D 2344 Test Method for Apparent Interlaminar Shear
Strength of Parallel Fiber Composites by Short-Beam 6. Storage and Conditioning of Components
Method
6.1 Glass rovings and yarns for use in fabrication of ring test
specimens shall be stored in a dry place, not subject to
3. Terminology
temperature extremes, or as specified by the glass producer.
3.1 For definitions of terms which apply to this practice, see
Prior to use, the rovings shall be conditioned in accordance
Terminology D 883.
with Procedure A of Practice D 618.
6.2 Resins to be used in the fabrication of ring test speci-
4. Significance and Use
mens shall be stored in closed containers at a temperature
4.1 This practice provides a uniform procedure for fabricat-
specified by the supplier. In addition, no resin shall be used that
ing glass fiber/thermoset resin ring samples for use as test
has been stored for a period in excess of the shelf life
recommended by the supplier. Prior to fabrication of the test
This practice is under the jurisdiction of ASTM Committee D-20 on Plastics
specimen, the resin shall be heated as necessary to provide
and is the direct responsibility of Subcommittee D20.18 on Reinforced Thermoset-
sufficient lowering of the viscosity to produce good wetting of
ting Plastics.
the reinforcement strand.
Current edition approved July 10, 1998. Published December 1998. Originally
e1
6.3 Preimpregnated materials received for the preparation of
published as D 2291 – 64 T. Last previous edition D 2291 – 83 (1989) .
Annual Book of ASTM Standards, Vol 08.01.
ring test specimens shall be stored in a closed container at a
Annual Book of ASTM Standards, Vol 15.03.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 2291
FIG. 1 Suggested Single-Ring Mold
temperature as recommended by the supplier. Before winding, 7.1.4 Level-Winding—Pass the wetted reinforcement
they shall be removed from storage and conditioned as through a level-winding guide and onto the mold. The guide
recommended by the supplier or in accordance with Procedure shall be geared to the mold or mandrel or shall follow a cam in
A of Methods D 618. such a manner that each revolution of the mold or mandrel will
be accompanied by a precision of the guide by an amount
7. Procedure for Dry Reinforcement
equivalent to one strand width.
7.1 Fig. 2 is a schematic diagram of the system for wetting, 7.1.5 Collecting Reinforcement—Collect the wetted rein-
tensioning, and collecting the reinforcement. forcement strand on a mold or mandrel that is mounted on the
7.1.1 Mounting Reinforcement Packages—Mount the rein- axle of a variable-speed drive. The strand velocity through the
forcement package in a convenient location within the super- resin bath shall be constant and shall be slow enough to give
structure of the winding machine. Provide sufficient braking of good wetting of the reinforcement with the resin. Apply an
the axle of the package to prevent free-wheeling. This should adequate mold release agent to the mold or mandrel before
be a minimum tension. winding is begun to assure easy removal of the specimen after
7.1.2 Application of Resin—The reinforcement leaving the fabrication. Wind specimens to be tested without machining
package shall pass immediately into the resin bath. Heat the the surface to a thickness as indicated for the Type B specimen,
resin bath sufficiently to lower the resi
...

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This specification covers unfilled and reinforced polycarbonate and polycarbonate copolymer materials suitable for injection molding, blow molding, and extrusion. Some of these compositions may also find use for compression molding or application from solution. Unfilled polycarbonate materials are classified into groups according to their composition. The groups are Group 01, Group 02, Group 03, Group 04, Group 05, and Group 06. These groups are subdivided into classes which are Class 0, Class 1, Class 2, Class 3, and Class 4 and these classes can be further be subdivided into grades which are Grade 1, Grade 2, Grade 3, Grade 4, Grade 5, Grade 6, Grade 7 and Grade 0. Different tests shall be conducted in order to determine the following properties of polymer materials: Izod impact strength, flexural modulus, tensile strength, and deflection temperature.
SCOPE
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5.2 It is recommended that control samples be fabricated with each research test series and that care be used to compare each set of controls with corresponding test series run at different times.
SCOPE
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