Accelerated testing of components made by additive manufacturing
Potluri, Shravya Sree
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Additive manufacturing, commonly known as 3D printing, has revolutionized manufacturing and it is finding applications from simple structures to aerospace. For automotive and aerospace applications, vibration is a big factor, but to date, long-term performance data has not been available for structures made using additive manufacturing and subjected to vibratory loading. No information is available for fatigue under sinusoidal load. Accelerated testing of 3D-printed and conventional samples made of stainless steel (316) is proposed in this thesis. Since little is known about additive-manufactured dynamic loading, this research was done in various steps. First tests were used to estimate the basic material properties such as modulus of elasticity, ultimate strength, etc. Next this material was subjected to sinusoidal vibration to obtain basic fatigue properties. The fatigue life of the conventional and the 3D-printed samples are compared.