ASME STP-PT-081:2017 pdf free download

ASME STP-PT-081:2017 pdf free download.CYCLIC STRESS-STRAIN CURVES .
The NIMS dat.ibase is already included in the ASME Materials Database and therefore FR) specific measures are needed. The University of Darmstadt fatigue database allows public access via user/password given on the database page (see link above).
Those two databases go even further to Coffin-Marison representations of ihe SIN curves, which might be a next step also for ASME’s purpose.
Although this appears to be a very condensed representation of cyclic stress-strain data, it says more than isolated points which can of course also be included. Appendix B: lists almost 300 such entries which were created during the preparation of this report. The table is not complete and although additional infom’iation still c5ists, ii cannot be fully completed because not all infonnation is available, however, the daii shown were sufficient to prepare the spreadsheets. Such input could be considered as a starling point to later implementing cyclic stress-strain data into the ASME Materials Database. In the preparation of this report. more than lOt) related papers were collected and reviewed.
14 CONCLUSIONS AND OUTLOOK
The main results of this report are discussed at length in the ‘Summary” section
The cyclic response (cyclic stress-strain curves) of different classes of materials were investigated based upon the available literature. The hysteresis loop at N/2 was taken as reference. The scatter of material data, limited data and complex (non—standardited) testing conditions allow only assessments of the average cyclic material behavior.
The proposed procedure requires only the yield stress, ultimate tensile stress and Young’s modulus of a given material. It can thereIre he perftwrned for materials given in ASME BPVC Section 11 Tables lID.
The cyclic data can be obtained from an Excel worksheet which allows for the calculation of monotonic stress-strain curves and cyclic stress-strain curves. The results are available as Figures and Tables. Engineering and true stress-strain curves can be reported.
A possibility for implementation of the results into the ASME Materials Database is discussed, Based on the literature collected, it could be possible to extend the assessment to Coffin-Manson plots of fatigue curves.