Authors:
Christophe Grosjean (CETIM, France),
Michel Marzin (CETIM, France),
Thomas Munch (Liebherr, France),
Maxime Robert (CETIM, France)
Abstract:
Metallic additive manufacturing processes are now widely used in many sectors, leading to more and more data on “conventional” mechanical testings. This article deals with a hydraulic block used on construction and mining machines and aims to have a better understanding of the behaviour of additively manufactured parts undergoing high internal and cyclic pressure.First, a topology optimization was performed to reduce weight and take advantage of AM’s ability to produce complex geometries.Then, different mechanical exams were carried out on samples and a pressure test was done on each component.A comparison between a conventional part and an AM parts enabled to demonstrate the interest of topology optimization to reduce pressure drops.Finally, fatigue tests were used to evaluate the cyclic pressure resistance of the parts. These tests were completed by a calculation phase allowing to better understand the origin of the various identified initiation sites.
DOI:
https://doi.org/10.59499/WP225371738