SBS: Dataset obtained from creep tests of...
In TTS: Master Curve Estimates Corresponding to Time-Temperature Superposition

SBS	R Documentation

Dataset obtained from creep tests of styrene-butadiene-styrene (SBS) composite by using Dynamic Mechanical Thermal Analysis (DMTA)

Description

SBS is a dataset composed of 195 rows and 3 columns that describes the performance in the framework of a creep test of a styrene-butadiene-styrene (SBS) composite. The creep tests are defined by the application of a constant stress, σ, and the measuring of the strain, \varepsilon (t), or compliance, J(t)= \varepsilon (t) / σ (in the present case), as the response variable. The experimental tests are made by Dynamic Mechanical Thermal Analysis (DMTA) technique, using a 3 point bending configuration with the following features: Clamp, 3-Point Bending; Geometry, Rectangular; Size: length of 20 mm, width of 5.54 mm, and thickness of about 3.87 mmm.

Format

This data frame is composed of the following columns:

Log10_time: It accounts for 39 different times from 2 s to 3600 s, in logarithmic scale for each one of the 5 studied temperatures (overall 195 observations).
Log10_Compliance: It accounts for 39 different values for the compliance, J (MPa-1), for each one of the 5 studied temperatures, in base-ten logarithmic scale.
Temperature: It is the variable that shows the temperature at which the measurements of compliance are experimentally obtained, namely 40, 50, 60, 70, and 80 Celsius degrees.

Details

The dataset corresponds to the measure of the compliance property (with respect to the time) of different specimens of a SBS composite. The measurements were obtained by DMTA experimental technique.

The application of the TTS principle to creep tests is becoming more and more common. Creep test provides information about the deformation of a material subjected to a constant load. This test is in accordance with many real applications such as the performance of shoe insoles, structural materials, asphalt, etc. In this framework, TTS provides the degree of the deformation of the material at an extended range of times, when this material is subjected to a constant load. Therefore, TTS is becoming increasingly useful in studies of material degradation and lifetime estimation. The use of the TTS principle with creep tests usually provides smoother master curves since each curve is usually defined by a larger number of experimental observations than, for example, modulus curves as a function of frequency.

Source

Janeiro-Arocas, J., Tarrío-Saavedra, J., López-Beceiro, J., Naya, S., López-Canosa, A., Heredia-García, N., and Artiaga, R. (2016). Creep analysis of silicone for podiatry applications. Journal of the Mechanical Behavior of Biomedical Materials, 63, 456-469. DOI 10.1016/j.jmbbm.2016.07.014.

Naya, S., Meneses A,. Tarrio-Saavedra, J,. Artiaga R., Lopez-Beceiro, J. and Gracia-Fernandez C. (2013) New method for estimating shift factors in time-temperatura superposition models. Journal of Thermal Analysis and Calorimetry. ISSN 1388-6150. DOI 10.1007/s10973-013-3193-1.