Acrylonitrile-butadiene-styrene fatigue

Fig. 4.69 Fatigue strength of acrylonitrile-butadiene-styrene materials in tension swell loading Ctsw at different load levels [12Els].

Fig. 4.70 Fatigue curves of acrylonitrile-butadiene-styrene using regular specimens, specimens with holes (0 3 mm) as stress concentrator and dynamic weldline under alternating load conditions cTdai [O60ss].

Acrylonitrile-butadiene-styrene terpolymer and low-density polyethylene generally cannot meet the fatigue endurance, dimensional stability, and heat and creep resistance requirements of precision gears. Such polymers are most often found in basic low-load or low-speed gears. 

Fig. 5.61 Dependence of failure stress of a variety of engineering polymers upon the number of cycles accumulated during a dynamic fatigue test at 2(fC. The polymers used were poly (methyl methacrylate) (PMMA), rigid poly (vinyl chloride) (PVC) and an acrylonitrile-butadiene-styrene copolymer (ABS). (After Bucknall, Gotham and Vincent Chapter 10 in Polymer Sciencey ed. Jenkinsy North-Holland, 1972.)...

Impact fatigue tests have also been conducted on some polymers namely Nylon 66, HIPS acrylonitrile butadiene styrene (ABS), and rubber-toughened Nylon. The impact energy was 98% of the crack initiation energy. Specimens withstood 100-200 cycles of loading before failure. 

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