1、Designation: D5083 101D5083 17Standard Test Method forTensile Properties of Reinforced Thermosetting PlasticsUsing Straight-Sided Specimens1This standard is issued under the fixed designation D5083; the number immediately following the designation indicates the year oforiginal adoption or, in the ca
2、se of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1 NOTEEditorially corrected Fig. 1 in February 2015.1. Scope*1.1 This test method covers the determina
3、tion of the tensile properties of thermosetting reinforced plastics using test specimensof uniform nominal width when tested under defined conditions of pretreatment, temperature, humidity, and testing-machine speed.NOTE 1Experience with this test method to date has been limited to glass-reinforced
4、thermosets. Applicability to other materials remains to bedetermined.1.2 This test method can be is used for testing materials of any thickness up to 14 mm (0.55 in.).NOTE 2This test method is not intended to cover precise physical procedures. It is recognized that the constant-rate-of-crosshead-mov
5、ement type oftest leaves much to be desired from a theoretical standpoint, that wide differences may exist between rate-of-crosshead movement and rate of strainbetween gagegauge marks on the specimen, and that the testing speeds specified disguise important effects characteristic of materials in the
6、 plastic state.Further, it is realized that variations in the thicknesses of test specimens that are permitted by these procedures, produce variations in the surface-volumeratios of such specimens, and that these variations may influence the test results. Hence, where directly comparable results are
7、 desired, all samples shouldbe of equal thickness. Special additional tests should be used where more precise physical data are needed.NOTE 3Use of this test method for testing materials of thicknesses greater than 14 mm (0.55 in.) is not recommended. Reducing the thickness bymachining may be accept
8、able for materials of uniform reinforcement amount and direction, but is generally not recommended.1.3 Test data obtained by this test method is relevant and appropriate for use in engineering design.1.4 The values stated in SI units are to be regarded as standard. The inch-pound units given in pare
9、ntheses are for informationonly.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitation
10、s prior to use.NOTE 4This test method is technically equivalent to ISO 527-4 except as noted below:standard and ISO 527-4 address(a) This test method does not include testing of the Type I dogbone shaped specimen described in ISO 527-4. Testing of this type of specimen, primarilyused for reinforced
11、and un-reinforced thermoplastic materials, is described in Test Method the same subject matter, D638.(b) The thickness of test specimens in this test method includes the 2 mm to 10 mm thickness range of ISO 527-4, but expands the allowable test thicknessto 14 mm.but differ in technical content.(a) T
12、his test method does not include testing of the Type I dogbone shaped specimen described in ISO 527-4. Testing of thistype of specimen, primarily used for reinforced and un-reinforced thermoplastic materials, is described in Test Method D638.(b) The thickness of test specimens in this test method in
13、cludes the 2 mm to 10 mm thickness range of ISO 527-4, but expandsthe allowable test thickness to 14 mm.(c) ISO 527-4 allows for the use of holes in the tabs of the test specimen while this standard does not.(d) The definitions for tensile strength and modulus differ between these two standards.NOTE
14、 5For tensile properties of resin-matrix composites reinforced with oriented continuous or discontinuous high modulus 20-Gpa20-GPa ( 3.0 106 -psi) fibers, tests shall be made in accordance with Test Method D3039/D3039M or ISO 527 Part 5.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Co
15、nditioning Plastics for Testing1 This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.10 on Mechanical Properties.Current edition approved April 1, 2010March 15, 2017. Published April 2010March 2017. Originally approved in
16、1990. Last previous edition approved in 20082010 asD5083 08.D5083 101. DOI: 10.1520/D5083-10E01.10.1520/D5083-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the
17、standards Document Summary page on the ASTM website.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. Becauseit may not be technically possible to adequately depict all changes accu
18、rately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor
19、 Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1D638 Test Method for Tensile Properties of PlasticsD883 Terminology Relating to PlasticsD3039/D3039M Test Method for Tensile Properties of Polymer Matrix Composite MaterialsD4000 Classification System for Specifying Plastic Materia
20、lsD5947 Test Methods for Physical Dimensions of Solid Plastics SpecimensE4 Practices for Force Verification of Testing MachinesE83 Practice for Verification and Classification of Extensometer SystemsE691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method2.2
21、ISO Standard:3ISO 527 PlasticsDetermination of Tensile PropertiesPart 1: General PrinciplesISO 527 Part 4 PlasticsDetermination of Tensile PropertiesTest Conditions for Isotropic and Orthotropic Fiber-ReinforcedPlastic CompositesISO 527 PlasticsDetermination of Tensile PropertiesPart 5: Test Conditi
22、ons for Unidirectional Fiber-Reinforced PlasticCompositesISO 1268 Fibre-Reinforced PlasticsMethods of Producing Test Plates3 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.FIG. 1 Standard and End Tabbed Specimen Dimensio
23、nsD5083 1723. Terminology3.1 DefinitionsDefinitions of terms applying to this test method appear in Terminology D883.3.1 DefinitionsDefinitions of terms applying to this test method appear in Terminology D883 and D638.4. Significance and Use4.1 This test method is intended for tensile testing of fib
24、er-reinforced thermosetting laminates. For injection moldedthermoplastics, both reinforced and unreinforced, Test MethodsMethod D638 is recommended. For most unidirectional fiberreinforced laminates, Test Methods D3039/D3039M is preferred.4.2 This test method is designed to produce tensile property
25、data for quality control and research and development. FactorsReport all factors that influence the tensile properties, and should therefore be reported, are: such as: material, methods of materialand specimen preparation, specimen conditioning, test environment, speed of testing, void content, and
26、volume percentreinforcement. See Section 12 for reporting requirements.4.3 It is realized that a material cannot be tested without also specifying the method of preparation of that material. Hence, whencomparative tests of materials per se are desired, the greatest care must be exercised to ensure t
27、hat all samples are prepared inexactly the same way, unless the test is to include the effects of sample preparation. Similarly, for referee purposes or comparisonswithin any given series of specimen, care must be taken to secure the maximum degree of uniformity in details of preparation,treatment,
28、and handling.NOTE 6Preparation techniques for reinforced thermosetting plastics can be found in the part of ISO 1268 appropriate to the manufacturing techniquefor the laminate.4.4 Tensile properties may provide useful data for engineering design purposes. However, because Because of the high degreeo
29、f sensitivity exhibited by many reinforced plastics to rate of straining and environmental conditions, data obtained by this testmethod cannot be considered valid for applications involving load-time scales or environments widely different from those of thistest method. In cases of such dissimilarit
30、y, no reliable estimation of the limit of usefulness can be made for most plastics. Thissensitivity to rate of straining and environment necessitates testing over a broad load-time scale (including impact and creep) andrange of environmental conditions.NOTE 7Since the existence of a true elastic lim
31、it in plastics (as in many other organic materials and in many metals) is debatable, the propriety ofapplying the term “elastic modulus” in its quoted generally accepted definition to describe the “stiffness” or stress-strain characteristics of plastic materialsis highly dependent on such factors as
32、 rate of application of stress, temperature, previous history of specimen, etc. However, stress-strain curves forplastics, determined as described in this test method, almost always show a linear region at low stresses. A straight line drawn tangent to this portion ofthe curve permits calculation of
33、 an elastic modulus of the usually defined type. Such a constant is useful if its arbitrary nature and dependence on time,temperature, and similar factors are realized.4.5 For manysome materials, there may be a specification that requiresare specifications that require the use of this test method,bu
34、t with some procedural modifications that take precedence when adhering to the specification. Therefore, it is advisable to referto that material specification before using this test method. Table 1 of Classification D4000 lists theASTM materials standards thatcurrently exist.5. Apparatus5.1 Testing
35、 MachineA testing machine of the constant-rate-of-crosshead-movement type and comprising essentially thefollowing:5.1.1 Fixed MemberA fixed or essentially stationary member carrying one grip.5.1.2 Movable MemberA movable member carrying a second grip.5.1.3 Grip:5.1.3.1 Grips for holding the test spe
36、cimen between the fixed member and the movable member.The grips shall be self-aligning,that is, they shall be attached to the fixed and movable member, respectively, in such a manner that they will move freely intoalignment as soon as any load is applied, so that the long axis of the test specimen w
37、ill coincide with the direction of the appliedload through the center line of the grip assembly. Align the specimen as perfectly as possible with the direction of pull so that norotary motion that may induce induces slippage will occur in the grips; there is a limit to the amount of misalignment sel
38、f-aligninggrips will accommodate.5.1.3.2 Mount the test specimen in such a way that slippage relative to the grips is prevented insofar as possible. Grip surfacesthat are deeply scored or serrated with a pattern similar to those of a coarse single-cut file, that is, serrations about 0.09 in. (2.4mm)
39、2.4 mm (0.09 in.) apart and about 0.06 in. (1.6 mm)1.6 mm (0.06 in.) deep or finer, have been found satisfactory for mostthermosetting materials. The serrations should need to be kept clean and sharp. Breaking If breaking in the grips may occur attimes, occurs, even when deep serrations or abraded s
40、pecimen surfaces are used; other techniques must be used in these cases. needto be employed. Other techniques that have been found useful, particularly with smooth-faced grips, are abrading that portion ofthe surface of the specimen that will be in the grips, and interposing thin pieces of abrasive
41、cloth, abrasive paper, or plastic orrubber-coated fabric, commonly called hospital sheeting, between the specimen and the grip surface. Number 80 double-sidedD5083 173abrasive paper has been found effective in many cases. An open-mesh fabric, in which the threads are coated with abrasive, hasalso be
42、en effective. The use of special types of grips is sometimes necessary to eliminate slippage and breakage in the grips.5.1.4 Drive MechanismA drive mechanism for imparting to the movable member a controlled velocity with respect to thestationary member, this velocity to be regulated as specified in
43、Section 8.5.1.5 Load IndicatorA suitable load-indicating mechanism capable of showing the total tensile load carried by the testspecimen when held by the grips. This mechanism shall be essentially free of inertia lag at the specified rate of testing and shallindicate the load with an accuracy of 61
44、% of the indicated value, or better. The accuracy of the testing machine shall be verifiedin accordance with Practices E4.NOTE 8Experience has shown that many testing machines now in use are incapable of maintaining accuracy for as long as the periods betweeninspection recommended in Practices E4. H
45、ence, it is recommended that each machine be studied individually and verified as often as may be foundnecessary. It may be necessary to perform this function daily.5.1.6 The fixed member, movable member, drive mechanism, and grips shall be constructed of such materials and in suchproportions that t
46、he total elastic longitudinal strain of the system constituted by these parts does not exceed 1 % of the totallongitudinal strain between the two gagegauge marks on the test specimen at any time during the test and at any load up to therated capacity of the machine.5.2 StrainStrain may be determined
47、 Determine strain by means of an extension indicator or strain indicator. If Poissons ratiois to be determined, the specimen must be instrumented to measure strain in both longitudinal and lateral directions.5.2.1 Extension Indicator (Extensometer)A suitable instrument for determining the distance b
48、etween two designated fixedpoints within the gagegauge length of the test specimen as the specimen is stretched. It is desirable, but not essential, that thisinstrument automatically record the distance, or any change in it, or of the elapsed time from the start of the test, or both. If onlythe latt
49、er is obtained, load-time data must also be taken. This instrument shall be essentially free of inertia at the specified speedof testing. Extensometers shall be classified and calibration periodically verified in accordance with Practice E83.5.2.2 Modulus MeasurementsFor modulus measurement, an extensometer with a maximum strain error of 0.0002 mm/mm or0.0002 in./in. that automatically and continuously records strain shall be used.AClass B-2 extensometer (see Practice E83) meetsthis requirement.5.2.3 Low-Extension MeasurementsFor low-extension
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