DOI: 10.5061/dryad.kd51c5bbw
title: Mechanical test on different elastomer materials based on the ASTM D412-16 standard

description: The main goal of conducting the mechanical tensile tests was to produce
 non-linear stress-strain curves for input data in the Ansys Workbench
 software. These curves played an important role in the accurate analysis
 of the mechanical behavior of the Finite Element Model (FEM) of the Hybrid
 III 5th percentile Female ATD lumbar spine prototype. In addition, these
 curves evaluated the suitability of elastomer materials for manufacturing
 the lumbar spine prototype. Forty-five Mechanical tensile tests
 were performed on five different elastomer materials (NR60, EPDM60, NEO60,
 CCP60, and CCP80) based on the ASTM D412-16 standard at three different
 strain rates including the standard strain rate (0.32 or =8mm/s), moderate
 strain rate (0.64 or =16mm/s), and high strain rate (4 or =100mm/s).
 Samples with standard and moderate strain rates were taken to failure
 using the MTS Insight 2 tensile testing machine. However, samples were not
 taken to failure in high-strain-rate testing due to the limited crosshead
 displacement (100mm) of the tensile testing machine (MTS 858 Bionix). The
 EPDM60 material with a tensile strength of 9.6 MPa demonstrated minimal
 Strain Rate Sensitivity (SRS =-0.06) up to 100% strain. The NR60 and CCP80
 materials had greater tensile strength (18.5 MPa and 14.8 MPa) than
 EPDM60, but medium strain rate sensitivity (SRS -0.11 and -0.15). The
 CCP60 and NEO60 materials had lower tensile strength (5.3 MPa and 4.8 MPa)
 than EPDM60, but the medium (SRS =-0.12) and maximal strain rate
 sensitivity (SRS=-0.3), respectively. The EPDM60 and NR60
 materials appeared to be suitable for manufacturing the lumbar spine
 prototype, as EPDM60 exhibits minimal SRS, whereas NR60, despite a slight
 difference with a minimal range of SRS, showed maximal strength. Results
 of the FEM analysis showed that the lumbar spine prototype by using NR60,
 performs better than EPDM60. Therefore, NR60 was selected as a suitable
 material for manufacturing the lumbar spine prototype.
description: Mechanical tensile tests were conducted to define nonlinear
 stress-strain curves and assess the suitability of elastomer materials for
 the Hybrid III 5% Female ATD lumbar spine prototype. These elastomer
 materials include the Natural Rubber 60±5 shore A
 (NR60), Ethylene Propylene Diene Monomer rubber 60±5 shore A (EPDM60),
 Neoprene Rubber 60±5 shore A (NEO60), Cold Castable Polyether 60±5 shore A
 (CCP60), and Cold Castable Polyether 80±5 shore A (CCP80). Mechanical
 tensile tests were performed based on procedures in the ASTM D412-16
 standard. Tension samples were prepared in a dog bone geometry (Die C).
 Width and thickness were measured for each specimen. The gauge length of
 each sample was considered 25±0.25mm in mechanical tests. Thirty tensile
 tests at the standard (0.32 or =8mm/s) and<strong>
 </strong>moderate (0.64 or =16mm/s) strain rates and fifteen tensile
 tests at high (4 or =100mm/s) strain rates were conducted by the MTS
 Insight 2 and MTS 858 Bionix tensile testing machines, respectively.
 Samples with the standard and moderate strain rates were taken to failure.
 Samples were not taken to failure in high-strain-rate testing due to the
 limited crosshead displacement (50mm) of the tensile testing
 machine.
description: # Mechanical test on different elastomer materials based on the ASTM
 D412-16 standard
 [https://doi.org/10.5061/dryad.kd51c5bbw](https://doi.org/10.5061/dryad.kd51c5bbw) Different elastomer materials underwent mechanical testing based on the ASTM D412-16 standard using different strain rates to obtain stress-strain curves. These curves provided good information on material properties, such as strength and Strain Rate Sensitivity (SRS). In addition, these curves were used in the Ansys Finite Element Model to assess the mechanical responses of the Hybrid III 5% Female ATD lumbar spine prototype in different boundary conditions. Finally, the results of the Ansys Finite element simulation contributed to selecting a suitable material for manufacturing the lumbar spine prototype. ### Description of the data and file structure Data Files: Data from all mechanical tests were collected in a Microsoft Excel file (Mechanical_tensile_tests_at_various_strain_rates_on_the_different_types_of_rubber_and_cold_castable_polyether_materials_based_on_the_ASTM_D412-16_standard.xlsx). To view the data, Microsoft Excel can be used to open the file. In an Excel file, each individual worksheet contains stress–strain data from mechanical tensile tests conducted at various strain rates on specific flexible materials, including different types of rubber and cold-castable polyether. The corresponding stress and strain values for each test are organized in adjacent columns, and the datasets for different tests are distinguished by using different fill colors in the first row of the stress–strain columns. Supplemental Files: Figures of mechanical tests for each sample are individually plotted, and detailed information is written in each Figure's caption. All Figures were collected in a Microsoft Word Document (.docx). A High-quality image (JPG file) of every single mechanical test was collected in a RAR file.