Browse Topic: Non-metallic materials testing

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DEVELOPMENT OF LABORATORY TESTING APPARATUS AND FATIGUE ANALYSIS FOR TRACKED VEHICLE RUBBER BACKER PADS2024-01-338111/15/2024
ABSTRACT The first part of this paper will outline the conception of the testing apparatus (Figure 1), along with its operation and preliminary results. The second part of the paper will discuss a new methodology used to correlate the dependence of crack growth rate for strain crystallizing natural rubbers in terms of tearing energy. The tearing energy which depends on the type of elastomer, geometry and stress strain behavior of a particular specimen demonstrates a direct correlation with the crack growth rate at different R-ratios (= min tearing energy/max tearing energy). Figure 1 Schematic of the testing apparatus
Kujawski, Daniel, DiStefano, Daren, Bradford, William
Technical Paper
DIGITAL TWIN FOR TANK TRACK ELASTOMERS: PREDICTING SELF-HEATING AND DURABILITY2024-01-364211/15/2024
ABSTRACT In this work, Abrams tank track system T-158LL backer pad elastomer self-heating and fatigue behavior was characterized experimentally, and the backer pad design was digitally twinned to show how complex in-service conditions can be evaluated virtually. The material characterization included measurement of the thermal properties and dissipative characteristics of the rubber compound, as well as its fatigue crack growth rate curve and crack precursor size. The analysis included 1) a structural finite element analysis of the backer pad in operation to obtain the load history, 2) a thermal finite element analysis to obtain steady-state operating temperature distribution within the backer pad, and 3) a thermo-mechanical fatigue analysis using the Endurica CL fatigue solver to estimate the expected service life and failure mode of the backer pad. As validation, experiments were conducted on the backer pad to measure operating temperature, fatigue life, and failure mode over a
Mars, William V., Castanier, Matthew, Ostberg, David, Bradford, William
Technical Paper
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