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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ASTM E Conducting Force Controlled Constant Amplitude Axial Fatigue Tests_百度文库
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Obvious abnormalities, such as cracks, machining marks, gouges, undercuts, and so forth, are not acceptable. E – 85 See all versions E e1 E E In reporting the results, state the criterion selected e466-69 de?
The trial test specimen should be turned about its axis, installed, and checked for each of four orientations within the? Paper Standards and Packaging Standards.
E – 10 See all versions E Ee1 E Ee1 E e1 E E Ee1 E e2 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. E e1 E E E As a conservative general measure, this procedure is recommended unless: E — 07 fatigue test the permanent deformation of the unbroken but tested specimens for example, ast, change in cross-section area of test section should be reported.
It is important that the accuracy of alignment be kept consistent from specimen to specimen. The trial specimen should be rotated about its longitudinal axis, installed and checked in both orientations within the?
E — 07 with as much economy as prudent. For rectangular cross section specimens, satm should be checked by placing longitudinal strain gages on either side of the trial specimen at the minimum width location. It is beyond the scope of Practice E to extrapolate beyond this range or to extend this assumption to other materials systems that may be viscoelastic or viscoplastic at ambient test temperatures and within the frequency regime mentioned.
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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? ASTM’s fatigue and fracture standards provide the appropriate procedures for carrying out fatigue, fracture, and other related tests on specified materials.
This is a particular danger in soft materials wherein material can be smeared over tool marks, thereby creating a potentially undesirable in? In the case of surfaces that are not smooth, due to the fact that some surface treatment or condition is being studied, the dimensions should be measured as above and e646-96 average, maximum, and minimum values reported. Glass Standards and Ceramic Standards.
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. Redline Version E e1 E E However, regardless of the nature of the forcing function, it should be reported sine, ramp, saw tooth, etc.
One exception may be where these parameters are under study.
The area restrictions should be the same as for the specimen described in 5. For most conventional grips, good alignment must come about from very careful attention to design detail. The size of the gripped end relative to the gage section, and the 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.
Since specimen preparation can strongly in? Electrical Standards and Magnetic Conductor Standards. This practice is limited to the fatigue testing of axial unnotched and notched specimens subjected to a constant amplitude, periodic forcing function in air at room temperature.
The varying stress amplitude, as determined by a suitable dynamic veri? Consumer Product Evaluation Standards.
This entire procedure should be clearly explained in the reporting since it is known to in? If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
This practice is e646-96 intended for application in axial fatigue tests of components or parts. E e1 E E The results may also be used as a guide for the selection of metallic materials for service under conditions of repeated direct stress.
E – 15 See all versions Redline Version E Ee1 E Ee1 E Redline Version Ee2 Ee1 E Every effort should be made to prevent the occurrence of misalignment, either due to twist rotation of the gripsor to a displacement in their axes of symmetry.