Standard Test Method for Strain-Controlled Fatigue Testing Active Standard ASTM E606 / E606M | E606M | Developed D eveloped by Subcommittee: E08.05 Book of Standards Volume: 03.01
ASTM E606 / E606M Significance and Use Strain-controlled fatigue is a phenomenon that is influenced by the same variables that influence forceStrain-controlled controlled fatigue. The nature of strain-cont strain-controlled rolled fatigue imposes distinctive requirements on fatigue testing methods. In particular, cyclic total strain should be measured and cyclic plastic strain should be determined. Furthermore, either of these strains typically is used to establish cyclic limits; total strain usually is controlled throughout the cycle. The uniqueness of this test method and the results it yields are the determination of cyclic stresses and strains at any time during the tests. Differences in strain histories other than constant-amplitude alter fatigue life as compared with the constant amplitude results (for example, periodic overstrains and block or spectrum histories). Likewise, the presence of nonzero mean strains and varying environmental conditions may alter fatigue life as compared with the constant-amplitude, fully reversed fatigue tests. Care must be exercised in analyzing and interpreting data for such cases. In the case of variable amplitude amplitude or spectrum strain histories, cycle counting can be performed with Practice E1049 . Strain-controlled fatigue can be an important consideration in the design of industrial products. It is important Strain-controlled for situations in which components or portions of components undergo either mechanically or thermally induced cyclic plastic strains that cause failure within relatively few (that is, approximately <10 5) cycles. Information obtained from strain-controlled strain-controlled fatigue testing may be an important element in the establishm establishment ent of design criteria to protect against component failure by fatigue. Strain-controlled fatigue test results are useful in the areas of mechanical design as well as materials research Strain-controlled and development, process and quality control, product performance, performance, and failure analysis. Results of a straincontrolled fatigue test program may be used in the formulation of empirical relationships relationships between the cyclic variables of stress, total strain, plastic strain, and fatigue life. They are commonly used in data correlations such as curves of cyclic stress or strain versus life and cyclic stress versus c yclic plastic strain obtained from hysteresis loops at some fraction (often half) of material life. Examination of the cyclic stress – stress – strain strain curve and its comparison with monotonic stress – stress – strain strain curves gives useful informati information on regarding the cyclic stability of a material, for example, whether the values of hardness, yield strength, ultimate strength, strain-hardening exponent, and strength coefficient will increase, decrease, or remain unchanged (that is, whether a material will harden, soften, or be stable) because of cyclic plastic straining (1). The presence of time-depende time-dependent nt inelastic strains during elevated temperature temperature testing provides the opportunity to study the effects of these strains on fatigue life and on the cyclic stress-strain response of the material. Information about strain rate effects, relaxation behavior, and creep also may be available from these tests. Results of the uniaxial tests on specimens of simple geometry can be applied to the design of components with notches or other complex shapes, provided that the strains can be determi determined ned and multiaxial states of stress or s train and their gradients are correctly correlated with the uniaxial strain data. 1. Scope 1.1 This test method covers the determination of fatigue properties of nominally homogeneous materials materials by the use of test specimens subjected to uniaxial forces. It is intended as a guide for fatigue testing performed in support of such s uch activities as materials research and development, mechanical design, process and quality control, product performance, and failure analysis. While this test method is intended primarily for straincontrolled fatigue testing, some sections may provide useful information for force-controlled or stresscontrolled testing.
1.2 The use of this test method is limited to specimens and does not cover testing of full-scale components, structures, or consumer products. 1.3 This test method is applicable to temperatures and strain rates for which the magnitudes of time-dependent inelastic strains are on the same order or less than the magnitudes of time-independent inelastic strains. No restrictions are placed on environmental factors such as temperature, pressure, humidity, medium, and others, provided they are controlled throughout the test, do not cause loss of or change in dimension with time, and are detailed in the data report. Note 1 — The term inelastic is used herein to refer to all nonelastic strains. The term plastic is used herein to refer only to the time-independent (that is, noncreep) component of inelastic strain. To truly determine a timeindependent strain the force would have to be applied instantaneously, which is not possible. A useful engineering estimate of time-independent strain can be obtained when the strain rate exceeds some value. For example, a strain rate of 1 × 10 −3 sec−1 is often used for this purpose. This value should increase with increasing test temperature. 1.4 This test method is restricted to the testing of uniform gage section test specimens subjected to axial forces as shown in Fig. 1(a). Testing is limited to strain-controlled cycling. The test method may be applied to hourglass specimens, see Fig. 1(b), but the user is cautioned about uncertainties in data analysis and interpretation. Testing is done primarily under constant amplitude cycling and may contain interspersed hold times at repeated intervals. The test method may be adapted to guide testing for more general cases where strain or temperature may vary according to application specific histories. Data analysis may not follow this test method in such cases. 1.5 The values stated in either SI units or 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 non-conformance with the standard.
Note 1 — * Dimension d is recommended to be 6.35 mm (0.25 in.). See 7.1. Centers permissible. ** This diameter may be made greater or less than 2d depending on material hardness. In typically ductile materials diameters less than 2d are often employed and in typically brittle materials diameters greater than 2d may be found desirable. Note 2 — Threaded connections are more prone to inferior axial alignment and have greater potential for backlash, particularly if the connection with the grip is not properly designed. FIG. 1 Recommended Low-Cycle Fatigue Specimens
Keywords Failure Analysis - Fatigue - Fracture Analysis - Mechanical Process - Performance Test ICS Code ICS Number Code 77.040.10 (Mechanical testing of metals) UNSPSC Code UNSPSC Code 41114608(Fatigue testers)
DOI: 10.1520/E0606_E0606M-12 ASTM International is a member of CrossRef.
ASTM E606 / E606M http://www.astm.org/Standards/E606.htm ASTM E606 / E606M - 12 Standard Test Method for Strain-Controlled Fatigue Testing
Citing ASTM Standards A988/A988M Standard Specification for Hot Isostatically-Pressed Stainless Steel Flanges, Fittings, Valves, and Parts for High Temperature Service A989/A989M Standard Specification for Hot Isostatically-Pressed Alloy Steel Flanges, Fittings, Valves, and Parts for High Temperature Service E466 Standard Practice for Conducting Force Controlled Constant Amplitude Axial Fatigue Tests of Metallic Materials E739 Standard Practice for Statistical Analysis of Linear or Linearized Stress-Life (S-N) and Strain-Life (ε-N) Fatigue Data E1012 Standard Practice for Verification of Testing Frame and Specimen Alignment Under Tensile and Compressive Axial Force Application E1823 Standard Terminology Relating to Fatigue and Fracture Testing E2207 Standard Practice for Strain-Controlled Axial-Torsional Fatigue Testing with Thin-Walled Tubular Specimens E2368 Standard Practice for Strain Controlled Thermomechanical Fatigue Testing
E2714 Standard Test Method for Creep-Fatigue Testing There are currently no referencing documents for this standard.
Standard Test Method for Strain-Controlled Fatigue Testing ASME https://www.google.com/search?hl=en&source=hp&q=Standard+Test+Method+for+StrainControlled+Fatigue+Testing+ASME&gbv=2&oq=Standard+Test+Method+for+StrainControlled+Fatigue+Testing+ASME&gs_l=heirloomhp.3...718743.725311.0.726902.6.1.0.5.5.0.110.110.0j1.1.0
Mechanical Engineering Question - Standards We are working in a Senior Design Project and we are trying to find information of the standard specimen dimensions for rotational fatigue testing. I was told by one of the professor that you may be able to help me. We look ASTM specs for info but seems like there is nothing for metals. We also find that ISO 1143 Metal talks about it but I don't know how to get the information for that standard. Last Updated: Oct 21, 2013 | 12 Views
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A Answer Hello,
Thanks for the challenging question. The short summary is that there is no ASTM standard that covers the same topic that ISO 1143 covers. If this email is confusing, please call me to clarify things. If you are free only on the weekend, I could meet you on Sunday. Send me an email so I can meet you. Otherwise, I can meet with you on Monday. Solution 1. Order the ISO through interlibrary loan. You will be required to pay the $25 when you pick up the scan of the article. Here are the instructions to order: http://library.uttyler.edu/circulation/ILL Here is the information that you need to fill in the ILL request: http://www.worldcat.org/title/metallic-materials-rotating-bar-bending-fatigue-testing-materiaux-
metalliques-essais-de-fatigue-par-flexion-rotative-de-barreaux/oclc/827778637&referer=brief_results Make sure to copy the information requested on the form, including OCLC number: OCLC Number: 827778637 This book doesn’t have an ISBN, so you can skip that line.
Here is the table of contents for this book: http://www.beuth.de/cmd%3Bjsessionid=259D318987229F0573DDBA699EA38B6F.1?workflowname=in foInstantdownload&docname=1735112&contextid=beuth&servicerefname=beuth&ixos=toc Option 2 – cobble information from many sources:
A. ASM Handbook – Volume 8 – in the stacks – Oversized Section TA 459.M43 1990 volume 8, page 370 for specimens B. From the readings, the specimen for this testing is metallic, so that solves part of the search problem. This little article gives some background: http://materion.com/~/media/Files/PDFs/Alloy/Newsletters/Technical%20Tidbits/Issue%20No%2054%2 0-%20Characterization%20of%20Fatigue%20Behavior The end of the article mentions three standards: The library has a 2003 copy, on page 446. T he book is a reference book. You can’t take it out, but you can scan the standard. Annual book of ASTM standards. Call Number: TA410 .A64 2003 V.2.02 ASTM B593: Standard Test Method for Bending Fatigue Testing for Copper-Alloy Spring Materials
Annual book of ASTM standards. Call Number: TA410 .A64 2003 V.3.01 ASTM E466, page 515: Standard Practice for Conducting Force-Controlled Constant Amplitude Axial Fatigue Tests of Metallic Materials ASTM E468, page 530: Standard Practice for Presentation of Constant Amplitude Fatigue Test Results for Metallic Materials ASTM E606, page 580: Standard Test Method for Strain-Controlled Fatigue Testing
C. These two lecture notes can give you an idea of how to conduct the tests: http://academic.uprm.edu/pcaceres/Courses/INME4011/MD-6A.pdf http://www.egr.msu.edu/classes/me471/thompson/handout/class13_2005SFatigue.pdf
D. Here is a 2010 ISO standard for Metallic Materials – Fatigue Testing. You will have to order through Interlibrary Loan, but it should be free. Texas Tech has a copy of this 39 page book. You can request it as a scan. You can use the OCLC number 186456703 in your request. http://www.worldcat.org/title/metallic-materials-fatigue-testing-fatigue-crack-growth-methodmateriaux-metalliques-essais-de-fatigue-methode-dessai-de-propagation-de-fissure-enfatigue/oclc/186456703?referer=di&ht=edition E. You need to log into the library website (library.uttyler.edu) to access this dissertation. This work on Fatigue Testing is mentioned a lot. Fracture testing is a subset of fatigue testing. Fracture toughness testing with notched round bars http://search.proquest.com/pqdtft/docview/304373477/14132B8A5FA1AE618CA/2?accountid=7123 F. This book has information on fatigue testing Here are selected chapters: http://www.astm.org/DIGITAL_LIBRARY/STP/SOURCE_PAGES/STP1360.htm You can select to order through Interlibrary Loan the entire book or just some chapters from Lamar University. It will be free. Use OCLC 43320196
G. Additional ASTM standards Here’s another list. If something catches your eye, let me know so I can find how you can get it. http://www.astm.org/Standards/fatigue-and-fracture-standards.html H. ASME article search: http://journals.asmedigitalcollection.asme.org/searchresults.aspx?q=rotating%20beam%20fatigue%20t esting%20metal&p=1&s=1&c=0 I. Google Scholar search on rotating beam fatigue testing –vascular (excludes the biomedical articles). http://scholar.google.com/scholar?q="rotating+beam+fatigue+testing"+vascular&btnG=&hl=en&as_sdt=0%2C44&as_ylo=2009&as_vis=1 J. Fatigue Testing e Book Go here and cut / paste the title with the quotation marks – in the search box http://library.uttyler.edu “Fatigue Testing and Analysis : Theory and Practice”
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