E Standard Practice for Conducting Force Controlled Constant Amplitude Axial Fatigue Tests of Metallic Materials force~ notched specimens~ unnotched. ASTM E()e1 Standard Practice for Conducting Force Controlled Constant Amplitude Axial Fatigue Tests of Metallic Materials. Last previous edition approved in as E – 96()?1. DOI: / E 2 Handbook of Fatigue Testing, ASTM STP
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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. E – 85 See all versions E e1 E E The varying stress amplitude, as determined by a suitable dynamic veri?
E — 07 with as much economy as prudent. Readers are referred to Ref 1 should this occur. As a cautionary note, should localized yielding occur, signi? However, the design should meet certain general criteria outlined below: One set of strain gages should be placed at the center of the gage length to detect misalignment that causes relative rotation of the specimen ends about axes perpendicular to the specimen axis.
A number in parentheses indicates the year of last reapproval. Originally approved in Also, Refsalthough they pertain to straincontrolled testing, may prove of interest since they deal with sheet specimens approximately 0. The acceptable ratio of the areas test section to grip section to ensure a test section failure is dependent on the specimen gripping method.
Ee1 E Ee1 E For rectangular cross section specimens, alignment should be checked by placing longitudinal strain gages on either side of the trial specimen at the minimum width location.
One exception may be where these parameters are under study. E – 02 e1 See all versions E e1 E E For tests run in compression, the length of the test section should be approximately two times the test section diameter to minimize buckling.
For cylindrical specimens, alignment should be checked by means of a trial test specimen with longitudinal strain gages placed at four equidistant locations around the minimum diameter. Your comments will receive careful consideration at a meeting of the d466-96 technical committee, which you may attend. Failure may be de? The test section length should be approximately two to three times the test section diameter. Soap Standards and Polish Standards. ASTM International takes no position respecting the validity of any patent rights astj in connection with any item mentioned in this standard.
Obvious abnormalities, such as cracks, machining marks, gouges, undercuts, and so forth, are not acceptable. Ee1 E e2 E e1 E E It is important that the accuracy of alignment be kept consistent from specimen to specimen.
NOTE 2—Measurements of dimensions presume smooth surface? The following documents, although not directly referenced in the text, are considered important enough to be listed in this practice: Corrosion Standards and Wear Standards. Regardless of the machining, grinding, or polishing method used, the?
The value of 1.
ASTM’s fatigue and fracture standards provide the appropriate procedures for carrying out fatigue, fracture, and other related tests on specified materials. The area restrictions should be the same as for the specimen described in 5.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Appendix X1 presents an example of a machining procedure that has been employed on some metals in an attempt to minimize the variability of machining and heat treatment upon fatigue life.
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.
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Current edition approved Nov. This practice is limited to the fatigue testing of axial unnotched and ee466-96 specimens subjected to a constant amplitude, periodic forcing function in air at room temperature. Business Copy Product Standards. For example, specimen alignment is of utmost importance and FIG.
This is a particular danger in soft materials wherein material can be smeared over tool marks, thereby creating a potentially undesirable in?
ASTM E Conducting Force Controlled Constant Amplitude Axial Fatigue Tests_百度文库
Glass Standards and Ceramic Standards. All material variables, testing information, and procedures used should be reported so that correlation and reproducibility of results may be attempted in a fashion that is e466-9 reasonably good current test practice. Search and Rescue Operations Standards. Paper Standards and Packaging Standards. Otherwise, the e466-966 dimensional relationships should apply, as in the case of the specimens described in 5. Electrical Standards and Magnetic Conductor Standards.
For specimens that are less than 0. Fillet undercutting can be readily determined by inspection. As a conservative general measure, this procedure is recommended unless: Last previous edition approved in as E — 96 ?
The reduced section length should be greater than three times the minimum test section diameter. Consumer Product Evaluation Standards.
Durability of Nonmetallic Material Standards.