ASTM E1012-2012 red 6250 Standard Practice for Verification of Testing Frame and Specimen Alignment Under Tensile and Compressive Axial Force Application《在拉伸和压缩轴向力作用下验证测试框架和试样比对的标准.pdf
《ASTM E1012-2012 red 6250 Standard Practice for Verification of Testing Frame and Specimen Alignment Under Tensile and Compressive Axial Force Application《在拉伸和压缩轴向力作用下验证测试框架和试样比对的标准.pdf》由会员分享,可在线阅读,更多相关《ASTM E1012-2012 red 6250 Standard Practice for Verification of Testing Frame and Specimen Alignment Under Tensile and Compressive Axial Force Application《在拉伸和压缩轴向力作用下验证测试框架和试样比对的标准.pdf(25页珍藏版)》请在麦多课文档分享上搜索。
1、Designation:E101205 Designation: E1012 12Standard Practice forVerification of Testing Frame and Specimen AlignmentUnder Tensile and Compressive Axial Force Application1This standard is issued under the fixed designation E1012; the number immediately following the designation indicates the year ofori
2、ginal adoption or, in the case 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. Scope1.1Included in this practice are methods covering the determinatio
3、n of the amount of bending that occurs during the applicationof tensile and compressive forces to notched and unnotched test specimens in the elastic range and to plastic strains less than 0.002.These methods are particularly applicable to the force application rates normally used for tension testin
4、g, creep testing, anduniaxial fatigue testing. *1.1 Included in this practice are methods covering the determination of the amount of bending that occurs during the applicationof tensile and compressive forces to notched and unnotched test specimens during routine testing in the elastic range. These
5、methods are particularly applicable to the force levels normally used for tension testing, creep testing, and uniaxial fatigue testing.The principal objective of this practice is to assess the amount of bending exerted upon a test specimen by the ordinary componentsassembled into a materials testing
6、 machine, during routine tests.2. Referenced Documents2.1 ASTM Standards:2E6 Terminology Relating to Methods of Mechanical TestingE8 Test Methods for Tension Testing of Metallic MaterialsE9 Test Methods of Compression Testing of Metallic Materials at Room TemperatureE21 Test Methods for Elevated Tem
7、perature Tension Tests of Metallic MaterialsE83 Practice for Verification and Classification of Extensometer SystemsE251 Test Methods for Performance Characteristics of Metallic Bonded Resistance Strain GaugesE466 Practice for Conducting Force Controlled Constant Amplitude Axial Fatigue Tests of Met
8、allic MaterialsE606 Practice for Strain-Controlled Fatigue TestingE1237 Guide for Installing Bonded Resistance Strain Gages2.2 Other Documents:VAMAS Guide 42 A Procedure for the Measurement of Machine Alignment in Axial Testing3. Terminology3.1 Definitions of Terms Common to Mechanical Testing:3.1.1
9、 For definitions of terms used in this practice that are common to mechanical testing of materials, see Terminology E6.3.1.2 notched sectionthe section perpendicular to the longitudinal axis of symmetry of the specimen where the cross-sectionalarea is intentionally at a minimum value in order to ser
10、ve as a stress raiser. alignment, nthe condition of a testing machine thatinfluences the introduction of bending moments into a specimen (or alignment transducer) during the application of tensile orcompressive forces.3.1.3 nominal percent bending in notched specimensthe percent bending in a hypothe
11、tical (unnotched) specimen of uniformcross sectionequal to the minimum cross section of the notched specimen, the eccentricity of the applied force in thehypothetical, and the notched specimens being the same. (See 11.1.5.) (This definition is not intended to define strain at the rootof the notch.)
12、eccentricity L, nthe distance between the line of action of the applied force and the axis of symmetry of thespecimen in a plane perpendicular to the longitudinal axis of the specimen.3.1.4 reduced sectionthe specimen length between the fillets. reduced section L, nsection in the central portion of
13、thespecimen which has a cross section smaller than the gripped ends.1This practice is under the jurisdiction of ASTM Committee E28 on Mechanical Testing and is the direct responsibility of Subcommittee E28.01 on Calibration ofMechanical Testing Machines and Apparatus.Current edition approved June 1,
14、 2005.2012. Published July 2005.June 2010. Originally approved in 1989. Last previous edition approved in 19992005 asE101299.E1012 05. DOI: 10.1520/E1012-05.10.1520/E1012-12.2For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For An
15、nual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.1This 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
16、be technically possible to adequately depict all changes accurately, 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
17、of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2 Definitions of Terms Specific to This Standard:3.2.1 alignmentthe condition of a testing machine and fixturing (including the test specimen) which can introduce bend
18、ingmoments into a specimen during the application of tensile or compressive forces. axial strain, a, nthe average of the longitudinalstrains measured by strain gages at the surface on opposite sides of the longitudinal axis of symmetry of the alignment transducerby multiple strain-sensing devices lo
19、cated at the same longitudinal position.3.2.1.1 DiscussionThis is the overall state of alignment comprising machine and specimen components.3.2.2apparatusthe components of the machine and fixturing to be used for testing. This includes all components that will beused repeatedly for multiple tests.3.
20、2.2.1DiscussionWhile the strain gaged specimen is not used for subsequent specimen testing it is included as part of theapparatus.3.2.3axial strainthe average of the longitudinal strains measured at the surface on opposite sides of the longitudinal axis ofsymmetry of the specimen by multiple strain-
21、sensing devices located at the same longitudinal position as the reduced section.3.2.3.1DiscussionThis definition is only applicable to this standard. The term is used in other contexts elsewhere inmechanical testing.3.2.4bending strain3.2.2 bending strain, b, nthe difference between the strain at t
22、he surface and the axial strain (see Fig. 1). In3.2.2.1 Discussionin general, the bending strain varies from point to point around and along the reduced section of thespecimen. Bending strain is calculated as shown in Section 1110.3.2.3 component (also known as force application component), nany of
23、the parts used in the attachment of the load cell orgrips to the testing frame, as well as any part, including the grips used in the application of force to the strain-gaged alignmenttransducer or the test specimen.3.2.4 grips, nthat part of the force application components that directly attach to t
24、he strain-gage alignment transducer or thetest specimen.3.2.5 eccentricitythe distance between the line of action of the applied force and the axis of symmetry of the specimen in aplane perpendicular to the longitudinal axis of the specimen. microstrain, nstrain expressed in micro-units per unit, su
- 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
5000 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:
- ASTME10122012RED6250STANDARDPRACTICEFORVERIFICATIONOFTESTINGFRAMEANDSPECIMENALIGNMENTUNDERTENSILEANDCOMPRESSIVEAXIALFORCEAPPLICATION

链接地址:http://www.mydoc123.com/p-527735.html