Observation of fracture behavior of 3-D printed specimens under rolling contact fatigue in water

Abstract

Abstract. Polymer bearing was widely used in the corrosive conditions because of its high corrosion durability. The polymer bearing had been formed using molding and machining until the new 3-D printing method was developed. In this study, we performed the rolling contact fatigue tests of the 3-D printed specimens in water and observed the fracture behaviour of the specimens. We found that the surface cracks are related to both the rolling direction and the lamination directions.

Effect of Lamination Direction on the AE Behavior of 3D Printed Specimen during Tensile Testing

“…Figure 1 shows a schematic illustration of the lamination method. The explanation of the directions are the same as in our previous works [3][4]. The machine has a line nozzle which makes a thin layer.…”

“…The lamination pitch was 16 µm. The material was an ABS-like polymer (VisiJet M3X, 3D Systems, Inc.) and the 3D printer (Projet 3510 HD plus, 3D Systems, Inc.) was the same as the one which we used in our previous works [3][4].…”

“…In our previous studies, we focused on the effect of the lamination direction on the development of fractures in bearing specimens [3][4]. From these investigations, we observed that the crack propagation started from small artificial defects and concluded that the crack propagation is not related to the lamination direction.…”

Failure Observation of 3D-Printed Thrust Bearing Specimens with Inner Defects in Water Conditions

“…The specimens were printed by a 3D printer (Projet 3510 HD plus, 3D Systems, Inc.) which we used in our previous work [10][11]. Figure 1 shows a photograph of a ring-shaped specimen.…”

“…However, questions remain about the strength of bearings made by this method. In our previous studies, we focused on the effect of the lamination direction on the development of fractures [10][11].…”