Astm e466

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Designation: E 466 – 07

Standard Practice for

Conducting Force Controlled Constant Amplitude Axial Fatigue Tests of Metallic Materials1
This standard is issued under the fixed designation E 466; 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 lastreapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope 1.1 This practice covers the procedure for the performance of axial force controlled fatigue tests to obtain the fatigue strength of metallic materials in the fatigue regime where the strains are predominately elastic, both upon initial loading and throughout the test. This practiceis limited to the fatigue testing of axial unnotched and notched specimens subjected to a constant amplitude, periodic forcing function in air at room temperature. This practice is not intended for application in axial fatigue tests of components or parts.
NOTE 1—The following documents, although not directly referenced in the text, are considered important enough to be listed in this practice:E 739 Practice for Statistical Analysis of Linear or Linearized StressLife (S-N) and Strain-Life (e-N) Fatigue Data STP 566 Handbook of Fatigue Testing2 STP 588 Manual on Statistical Planning and Analysis for Fatigue Experiments3 STP 731 Tables for Estimating Median Fatigue Limits4

E 467 Practice for Verification of Constant Amplitude Dynamic Forces in an Axial Fatigue Testing System E 468Practice for Presentation of Constant Amplitude Fatigue Test Results for Metallic Materials E 606 Practice for Strain-Controlled Fatigue Testing E 739 Practice for Statistical Analysis of Linear or Linearized Stress-Life ( S-N) and Strain-Life (e-N) Fatigue Data E 1012 Practice for Verification of Test Frame and Specimen Alignment Under Tensile and Compressive Axial Force Application E 1823 TerminologyRelating to Fatigue and Fracture Testing 3. Terminology 3.1 Definitions: 3.1.1 The terms used in this practice shall be as defined in Terminology E 1823. 4. Significance and Use 4.1 The axial force fatigue test is used to determine the effect of variations in material, geometry, surface condition, stress, and so forth, on the fatigue resistance of metallic materials subjected to direct stress forrelatively large numbers of cycles. The results may also be used as a guide for the selection of metallic materials for service under conditions of repeated direct stress. 4.2 In order to verify that such basic fatigue data generated using this practice is comparable, reproducible, and correlated among laboratories, it may be advantageous to conduct a round-robin-type test program from astatistician’s point of view. To do so would require the control or balance of what are often deemed nuisance variables; for example, hardness, cleanliness, grain size, composition, directionality, surface residual stress, surface finish, and so forth. Thus, when embarking on a program of this nature it is essential to define and maintain

1 This practice is under the jurisdiction of ASTM Committee E08 onFatigue and Fracture and is the direct responsibility of Subcommittee E08.05 on Cyclic Deformation and Fatigue Crack Formation. Current edition approved Nov. 1, 2007. Published November 2007. Originally approved in 1972. Last previous edition approved in 2002 as E 466 – 96(2002)e1 . 2 Handbook of Fatigue Testing, ASTM STP 566, ASTM, 1974. 3 Little, R. E., Manual on Statistical Planning and Analysis,ASTM STP 588, ASTM, 1975. 4 Little, R. E., Tables for Estimating Median Fatigue Limits, ASTM STP 731, ASTM, 1981. 5 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website.

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