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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The storage medium should generally be removed before testing using appropriate solvents, if necessary, without adverse effects upon the life of the specimens. Consumer Product Evaluation Standards. E – 03 See all versions E E E Medical Device Standards and Implant Standards.
ASTM E Conducting Force Controlled Constant Amplitude Axial Fatigue Tests_百度文库
Paint Standards and Related Coating Standards. However, regardless of the nature of the forcing function, it should be reported sine, ramp, saw tooth, etc. Originally approved in The varying stress amplitude, as determined by a suitable dynamic veri?
The test section length should be approximately two to three times the test section width of the specimen. ASTM’s fatigue and fracture standards provide the appropriate procedures for carrying out fatigue, fracture, and other related tests on specified materials. Thus, when embarking on a program of this nature it is essential to define and maintain consistency a priori, as many variables as reasonably possible, with as much economy as prudent.
The size of the gripped end relative to the gage section, and xstm blend radius from gage section into the grip section, may cause premature failure particularly if fretting occurs in the grip section or if the radius is too small. E e1 E E E NOTE 1—The following documents, although not directly referenced in the text, are considered important enough to be listed in this practice: Search and Rescue Operations Standards.
E E E Historical Version s – view previous versions of standard.
The trial test specimen should be turned atsm its axis, installed, and checked for each of four orientations within the? 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 considered reasonably good current test practice. The area restrictions should be the same as for the specimen described in 5.
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E — 07 fatigue test the permanent deformation of the unbroken but tested specimens for example, percent change in cross-section area of test section should be reported. Assurance that surface residual stresses are minimized can be achieved by careful control of the machining procedures.
Current edition approved Nov.
E – 04 See all astk E E e1 E It is important that the accuracy of alignment be kept consistent from specimen to specimen. In the typical regime of 10? 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?
Fatigue Standards and Fracture Standards
In addition to fracture toughness and strain gradient, ast standards also present the procedures for determining K-R curves, stress-life and strain-life fatigue data, threshold stress intensity factors, and reference temperatures. Since however, the environment can greatly in? Also, Refsalthough they pertain to straincontrolled testing, may prove of interest since they deal with sheet specimens approximately 0.
The test forces should be monitored continuously in the early stage of the test and asstm, thereafter, to ensure that the desired force cycle is maintained. E e1 E E In view of this, no maximum ratio of area grip to test section should apply.
The following documents, although not directly referenced in the text, are considered important enough to be listed in this practice: It is advisable to determine these surface residual e466-966 with X-ray diffraction peak shift or similar techniques, and that the value of the surface residual stress be reported along with the direction of determination that is, longitudinal, transverse, radial, and so forth.
This practice is not intended for application in axial fatigue tests of components or parts.