ASTM D412-2015 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers&x2014 Tension《硫化橡胶和热塑性弹性体的标准试验方法 张力》.pdf
《ASTM D412-2015 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers&x2014 Tension《硫化橡胶和热塑性弹性体的标准试验方法 张力》.pdf》由会员分享,可在线阅读,更多相关《ASTM D412-2015 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers&x2014 Tension《硫化橡胶和热塑性弹性体的标准试验方法 张力》.pdf(14页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D412 15Standard Test Methods forVulcanized Rubber and Thermoplastic ElastomersTension1This standard is issued under the fixed designation D412; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、 A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 These test methods cover procedures used to ev
3、aluatethe tensile (tension) properties of vulcanized thermoset rubbersand thermoplastic elastomers. These methods are not appli-cable to ebonite and similar hard, low elongation materials.The methods appear as follows:Test Method ADumbbell and Straight Section SpecimensTest Method BCut Ring Specimen
4、sNOTE 1These two different methods do not produce identical results.1.2 The values stated in either SI or non-SI units shall beregarded separately as normative for this standard. The valuesin each system may not be exact equivalents; therefore eachsystem must be used independently, without combining
5、 values.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Refe
6、renced Documents2.1 ASTM Standards:2D1349 Practice for RubberStandard Conditions for Test-ingD1566 Terminology Relating to RubberD3182 Practice for RubberMaterials, Equipment, and Pro-cedures for Mixing Standard Compounds and PreparingStandard Vulcanized SheetsD3183 Practice for RubberPreparation of
7、 Pieces for TestPurposes from ProductsD3767 Practice for RubberMeasurement of DimensionsD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustriesE4 Practices for Force Verification of Testing Machines2.2 ASTM Adjunct:Cut Ring Specimens, M
8、ethod B (D412)32.3 ISO Standards:ISO 37 Rubber, Vulcanized and Thermoplastic Determina-tion of Tensile Stress-Strain Properties43. Terminology3.1 Definitions:3.1.1 tensile setthe extension remaining after a specimenhas been stretched and allowed to retract in a specified manner,expressed as a percen
9、tage of the original length. (D1566)3.1.2 tensile set-after-breakthe tensile set measured byfitting the two broken dumbbell pieces together at the point ofrupture.3.1.3 tensile strengththe maximum tensile stress appliedin stretching a specimen to rupture. (D1566)3.1.4 tensile stressa stress applied
10、to stretch a test piece(specimen). (D1566)3.1.5 tensile stress at-given-elongationthe stress requiredto stretch the uniform cross section of a test specimen to agiven elongation. (D1566)3.1.6 thermoplastic elastomersa diverse family of rubber-like materials that unlike conventional vulcanized rubber
11、s canbe processed and recycled like thermoplastic materials.3.1.7 ultimate elongationthe elongation at which ruptureoccurs in the application of continued tensile stress.3.1.8 yield pointthat point on the stress-strain curve, shortof ultimate failure, where the rate of stress with respect tostrain,
12、goes through a zero value and may become negative.(D1566)1These test methods are under the jurisdiction of ASTM Committee D11 onRubber and are the direct responsibility of Subcommittee D11.10 on PhysicalTesting.Current edition approved Oct. 1, 2015. Published January 2016. Originallyapproved in 1935
13、. Last previous edition approved in 2013 as D412 06a (2013).DOI: 10.1520/D0412-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary pag
14、e onthe ASTM website.3Detailed drawings are available from ASTM Headquarters, 100 Barr HarborDrive, Conshohocken, PA 19428. Order Adjunct No. ADJD0412.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.Copyright ASTM International, 100 Barr Har
15、bor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.9 yield strainthe level of strain at the yield point.(D1566)3.1.10 yield stressthe level of stress at the yield point.(D1566)4. Summary of Test Method4.1 The determination of tensile properties starts with testpieces taken f
16、rom the sample material and includes thepreparation of the specimens and the testing of the specimens.Specimens may be in the shape of dumbbells, rings or straightpieces of uniform cross-sectional area.4.2 Measurements for tensile stress, tensile stress at a givenelongation, tensile strength, yield
17、point, and ultimate elonga-tion are made on specimens that have not been prestressed.Tensile stress, yield point, and tensile strength are based on theoriginal cross-sectional area of a uniform cross-section of thespecimen.4.3 Measurement of tensile set is made after a previouslyunstressed specimen
18、has been extended and allowed to retractby a prescribed procedure. Measurement of “set after break” isalso described.5. Significance and Use5.1 All materials and products covered by these test meth-ods must withstand tensile forces for adequate performance incertain applications. These test methods
19、allow for the measure-ment of such tensile properties. However, tensile propertiesalone may not directly relate to the total end use performanceof the product because of the wide range of potential perfor-mance requirements in actual use.5.2 Tensile properties depend both on the material and thecond
20、itions of test (extension rate, temperature, humidity, speci-men geometry, pretest conditioning, etc.); therefore materialsshould be compared only when tested under the same condi-tions.5.3 Temperature and rate of extension may have substantialeffects on tensile properties and therefore should be co
21、ntrolled.These effects will vary depending on the type of material beingtested.5.4 Tensile set represents residual deformation which ispartly permanent and partly recoverable after stretching andretraction. For this reason, the periods of extension andrecovery (and other conditions of test) must be
22、controlled toobtain comparable results.6. Apparatus6.1 Testing MachineTension tests shall be made on apower driven machine equipped to produce a uniform rate ofgrip separation of 500 6 50 mm/min (20 6 2 in./min) for adistance of at least 750 mm (30 in.) (see Note 2). The testingmachine shall have bo
23、th a suitable dynamometer and anindicating or recording system for measuring the applied forcewithin 62 %. If the capacity range cannot be changed for a test(as in the case of pendulum dynamometers) the applied force atbreak shall be measured within 62 % of the full scale value,and the smallest tens
24、ile force measured shall be accurate towithin 10 %. If the dynamometer is of the compensating typefor measuring tensile stress directly, means shall be provided toadjust for the cross-sectional area of the specimen. Theresponse of the recorder shall be sufficiently rapid that theapplied force is mea
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD4122015STANDARDTESTMETHODSFORVULCANIZEDRUBBERANDTHERMOPLASTICELASTOMERSX2014TENSION 硫化橡胶 塑性 弹性体
链接地址:http://www.mydoc123.com/p-511676.html