Abstract
Laser Sintering offers manufacturers freedom of design, which enables creating parts with complex geometries. However, very little investigation has been made into the effects of geometry on mechanical properties of the parts. In the present study, Laser Sintered Nylon 12 parts with different section thickness are subjected to displacement controlled tension-tension and force-controlled fully reversed fatigue loading to investigate the effect of geometry on their fatigue behavior. Section thickness of the parts is shown to have no significant influence on the fatigue behavior under tension only loading. However, fatigue life of parts under fully reversed loading is shown to increase with section thickness.
Highlights
Additive Manufacturing (AM) technologies have long been renowned for producing parts with poor and/or unrepeatable mechanical properties
Van Hooreweder et al [6] subjected Nylon 12 laser sintered specimens to stress-controlled tension-compression fatigue loading with zero mean stress to investigate their thermal and microstructural response
Laser sintered nylon 12 parts with different section-thicknesses were subjected to tension-tension and tension-compression loading to investigate the effect of section-thickness on their fatigue behaviour
Summary
Additive Manufacturing (AM) technologies have long been renowned for producing parts with poor and/or unrepeatable mechanical properties. Parts produced by LS have been shown in several studies [1]–[4] to demonstrate mechanical properties that are very close to the material properties obtained by conventional manufacturing processes, like injection moulded plastic components. Van Hooreweder et al [6] subjected Nylon 12 laser sintered specimens to stress-controlled tension-compression fatigue loading with zero mean stress to investigate their thermal and microstructural response. Amel et al [7] investigated fatigue behaviour of LS Nylon 12 parts subject to displacementcontrolled tension only fatigue loading. Van Hooreweder et al [8] have explored the difference in fatigue behaviour of LS and injection moulded Nylon 12 samples
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