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ASTM D2291-03

(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

SIGNIFICANCE AND USE
This practice provides a uniform procedure for fabricating glass fiber/thermoset resin ring samples for use as test specimens. Specimens so prepared can be used in Test Methods D 2290 and in D 2344.
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 either SI units of inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the 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.
Note 1—There is no ISO equivalent to this standard.

General Information

Status
Historical
Publication Date
31-Oct-2003
ICS
83.120 - Reinforced plastics
Technical Committee
D20 - Plastics
Drafting Committee
D20.18 - Reinforced Thermosetting Plastics
Current Stage
Ref Project

Relations

Replaces
ASTM D2291-98 - Standard Practice for Fabrication of Ring Test Specimens for Glass-Resin Composites
Effective Date
01-Nov-2003
Replaced By
ASTM D2291-09 - Standard Practice for Fabrication of Ring Test Specimens for Glass-Resin Composites
Effective Date
01-Sep-2009
Referred By
ASTM D7745-19 - Standard Practice for Testing Pultruded Composites
Effective Date
01-Nov-2003

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ASTM D2291-03 - Standard Practice for Fabrication of Ring Test Specimens for Glass-Resin CompositesASTM D2291-03 - Standard Practice for Fabrication of Ring Test Specimens for Glass-Resin Composites
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ASTM D2291-03 - Standard Practice for Fabrication of Ring Test Specimens for Glass-Resin Composites
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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:D 2291–03
Standard Practice for
Fabrication of Ring Test Specimens for Glass-Resin
1
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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 4. Significance and Use
1.1 This practice is intended for use in the fabrication of 4.1 This practice provides a uniform procedure for fabricat-
ring-type test specimens to be used in the evaluation of the ing glass fiber/thermoset resin ring samples for use as test
mechanical properties of reinforcement and resins in a com- specimens.SpecimenssopreparedcanbeusedinTestMethods
posite structure. The practice outlines the steps in the prepara- D 2290 and in D 2344.
tion of the test specimens, including the final specimen
5. Apparatus
machining where applicable. Four final ring configurations are
included. 5.1 Winding Machine—The winding machine may consist
of any adequate superstructure for mounting impregnated
1.2 The values stated in either SI units of inch-pound units
are to be regarded separately as standard. The values stated in reinforcement or components for application of resin to the
reinforcement, tensioning the reinforcement, and collecting the
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining wetted, tensioned material on a mold or mandrel of the desired
size.
values from the two systems may result in nonconformance
with the standard. 5.2 Tension Measuring System—Any device suitable for
measurement of the tension applied to the wetted reinforce-
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the ment. The device shall be capable of measuring the tension
accurately to within 65%.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 5.3 The single-ring fabrication mold on which the wetted
bility of regulatory limitations prior to use. reinforcementiscollectedshallbeconstructedasshowninFig.
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
surfacesofthemoldormandrelthatcontacttheringspecimens
2
2.1 ASTM Standards:
shall be coated or otherwise treated to prevent sticking of the
D 618 Practice for Conditioning Plastics for Testing
ring or cylinder in the mold or on the mandrel.
D 2290 Test Method forApparent Hoop Tensile Strength of
5.4 Curing Ovens—Ovens having adequate range in tem-
Plastic or Reinforced Plastic Pipe by Split Disk Method
perature to produce a fully cured specimen shall be available
D 2344 Test Method for Short-Beam Strength of Polymer
for use. Control of the curing-postcuring temperatures to
Matrix Composite Materials and Their Laminates
within 69°F [65°C] is required.
3. Terminology
6. Storage and Conditioning of Components
3.1 For definitions of terms which apply to this practice, see
6.1 Glassrovingsandyarnsforuseinfabricationofringtest
Terminology D 883.
specimens shall be stored in a dry place, not subject to
temperature extremes, or as specified by the glass producer.
1
This practice is under the jurisdiction ofASTM Committee D20 on Plastics and
Prior to use, the rovings shall be conditioned in accordance
is the direct responsibility of Subcommittee D20.18 on Reinforced Thermosetting
with Procedure A of Practice D 618.
Plastics.
6.2 Resins to be used in the fabrication of ring test speci-
Current edition approved Nov. 1, 2003. Published January 2004. Originally
approved in 1964. Last previous edition approved in 1998 as D 2291 - 98.
mens shall be stored in closed containers at a temperature
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
specifiedbythesupplier.Inaddition,noresinshallbeusedthat
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
has been stored for a period in excess of the shelf life
Standards volume information, refer to the standard’s Document Summary page on
recommended by the supplier. Prior to fabrication of the test
the ASTM website.
*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.
1

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D 2291–03
FIG. 1 Sugge
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This specification covers glass-fiber reinforced polyester plastic panels intended for use in construction. Light transmitting panels covered by this specification are divided into two types, based on relative response to a laboratory flammability test: Type CC1 for limited flammability and Type CC2 for general purpose. These types may be further subdivided by grades based on relative response to weathering tests: Grade 1 for weather resistance and Grade 2 for general purpose. The polyester resin used in the panels shall be a thermosetting styrenated and acrylated polyester resin composed of polymeric esters in which the recurring ester groups are an integral part of the main polymer chain. The resin shall be reinforced with glass fibers. The polyester resin may contain additives for various purposes. The materials shall be tested for water absorption, tensile strength, linear thermal expansion, and flexural strength.
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This specification covers the material and design requirements, and fabrication of ducts and hoods made of "fiberglass" (glass fiber reinforced thermosetting resin) consisting of a polyester, vinyl ester, or other qualified resin-matrix systems with fiber reinforcement manufactured by contact molding, intended for use in handling corrosive fumes and process gases. Special attention is given to equipment that operates at specified temperatures with regard to strength and corrosion resistance. This specification does not address the selection of resins and reinforcements for specific chemical environments.
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4.1 The results obtained by this practice shall serve as a guide in, but not as the sole basis for, selection of a thermosetting resin used in an RTP structure. No attempt has been made to incorporate into the practice all the various factors that will potentially affect the serviceability of an RTP structure when subjected to chemical environments. These factors will potentially include stress, different resin-to-glass ratios, and multiple veils.
SCOPE
1.1 This practice is designed to evaluate, in an unstressed state, the chemical resistance of thermosetting resins used in the fabrication of reinforced thermosetting plastic (RTP) laminates. This practice provides for the determination of changes in the properties, described as follows, of the test specimens and test reagent after exposure of the specimens to the reagent: hardness of specimens, weight change thickness, appearance of specimens, appearance of immersion media, and flexural strength and modulus.  
1.1.1 This practice is also useful to evaluate other factors, such as surfacing veils and the effect of resin additives, on the chemical resistance of the resin.  
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.
Note 1: There is no known ISO equivalent to this standard.  
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