PUB - Pulse Tests on Additive Manufactured Valve Blocks Damage Analysis and New Design Possibilities

 

In cooperation with the Chair of Digital Additive Production (DAP), additively manufactured valve blocks were examined with regard to their strength. For this purpose, the test blocks were subjected to a pulsating compressive load. The blocks represent images of conventionally manufactured valve blocks, which were also subjected to the test procedure as a reference. In addition to an exact copy of the conventional valve block, a geometry-optimised additively manufactured version was also examined. The work allows the fatigue strength of additively manufactured components to be assessed in comparison to conventionally manufactured components and the potential of these for use in hydraulic systems to be evaluated.

12/10/2021
 

Authors: Deuster, Sebastian; Aengenheister, Stefan; Matthiesen, Gunnar; Schmitz, Katharina

Additive manufacturing processes are currently experiencing an enormous upswing in different areas. The demand for more efficient and powerful hydraulic systems has risen rapidly in recent years. Due to cost savings and resource conservation, there are always efforts to reduce the power-to-weight ratio of hydraulic components. Especially in areas where weight savings lead to large performance savings, such as the aerospace industry, additively manufactured components in hydraulic systems are becoming increasingly popular. This paper deals with the testing of additively manufactured hydraulic manifold blocks with regard to their strength values. For this purpose, the components are experimentally loaded with pressure pulses until they fail. Subsequently, the cause of fracture is to be determined by means of a surface examination and thus a statement made about the suitability of additively manufactured components in hydraulic systems. These considerations show the potential of additive manufacturing for weight and material savings in hydraulic applications.

 

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