Raw Dataset of tensile engineering stress-strain from advanced polymer architecture fluoroelastomer test inflatable seals, produced by cold feed extrusion and continuous cure and aimed at Gen IV Sodium-cooled Fast Reactor technology
The Raw Dataset was obtained by stretching (50 mm/ min) ASTM Die C dumb-bell specimens (till failure) in a Hounsfield Universal Testing Machine or UTM (H10KS) at ambient and elevated (120 Degree Celsius/ hot) temperatures. The specimens from 2 defective test inflatable seals (Seals), 3 per Seal Quadrant (per measuring temperature) Ideally, were stretched after environmental conditioning and without stress softening. The fluorohydrocarbon rubber (FKM) Seals, belonging to 500 MW(e) Prototype Fast Breeder Reactor (PFBR) design and produced by cold feed extrusion and continuous cure (CFECC), were rejected (manufacture: 2007) due to quality issues. Tensile tests in the UTM after standard-Seal-storage (since 2007), as part of broader experimental design (2017- 2019), were aimed at adequate quality and its consistency across seal-production-batches (for repeatability/ reproducibility) in consonance with Gen IV Sodium-cooled Fast Reactor (SFR) technology. For that purpose, signature of defective production (CFECC) on Seal compound (APA-1, 2007) had to be retained in the specimens by proper specimen-preparation from the Seals. APA-1 2007, made of advanced polymer architecture (APA), is a blend compound (50 : 50) of peroxide cured Viton GBL 200S : 600S. The Raw Dataset, containing the signature (residual stress, substantially lower hot tensile strength) of defective CFECC, corresponds to stress-strain curves in a related research article viz., N. K. Sinha, S. Chattopadhyay, 2022. A case study on elimination of premature failure sources ....etc. Eng Fail Anal. 134, 106039. https://doi.org/10.1016/j.engfailanal.2022.106039. The related research article showed that the signature (Seal defect) is traceable to defect source i.e., improper cure index of APA-1, 2007. The source propagated from macromolecular to macroscopic domain (i.e. defect) through the routes of premature inception of cure (in APA-1, 2007) and undercure (of APA-1, 2007) during the defective CFECC 46 sets of tensile engineering stress-strain (instead of 48 Ideally, due to non-availability of sufficient reliable data), are organised in 3 Levels using 7 folders i.e., L-1: RAW_ESS_SEALS_CSV, L-2: R_ESS_SEAL-1_CSV, L-2: R_ESS_SEAL-2_CSV, L-3: R_ESS_SEAL-1-RT_CSV, R_ESS_SEAL-1-120_CSV, L-3: R_ESS_SEAL-2-RT_CSV and R_ESS_SEAL-2-120_CSV. Each of the 4 L-3 folders contains 2 CSV (comma separated value) files or Tables. Each Table contains data from 2 Quadrants (6 specimens, Ideally) including individual specimen thickness (ST). The Raw Dataset was obtained by rounding UTM raw data to a precision of 2 digits after decimal. The Raw Dataset could be reused in finite element analysis (FEA) for new sizing-optimisation-design. Modelling-simulation-validation (of defect, manufacture) by residual stress and significantly lower hot tensile strength in the Raw Dataset, using Molecular Dynamics-Monte Carlo method-FEA, are other reuse potential which lead to new-constitutive-relation-development naturally.
Steps to reproduce
Compositional details of APA-1, 2007, used to produce the Seals by CFECC (2007), are provided in the related research article viz.,N. K. Sinha, S. Chattopadhyay, 2022. A case study on elimination of premature failure sources from manufacture of fluoroelastomer inflatable seals for sodium cooled fast reactor towards sustainability. Eng Fail Anal. 134, 106039. https://doi.org/10.1016/j.engfailanal.2022.106039. Mixing procedure of the peroxide cured APA-FKM Seal compound (APA-1, 2007) based on Viton GBL 200S:600S 50:50 blend, could be obtained from a benchmark study on CFECC of identical Seal design, used in the related research article viz., N. K. Sinha, Baldev Raj, Optimisation of material and production to develop fluoroelastomer inflatable seal for sodium cooled fast breeder reactor, Nucl. Eng. Des. 241 (2011) 739- 751. https://doi.org/10.1016/j.nucengdes.2011.01.027. The related research article provides details of testing procedure (along with standards), adopted in the UTM (Hounsfield H10KS) to produce the RT-DSOT UTM raw data from the ASTM Die C dumb-bell specimens (from the Seals) and eventually the raw dataset presented here. Steps necessary to reproduce the raw dataset could be obtained by combining information from the above.