Analysis of crack growth in 3D printed plastic wrench

This research has been supported by Polymer Competence Center Leoben GmbH (PCCL, Austria) and the Ministry of Education, Youth and Sports of the Czech Republic under the project m- IPMinfra (CZ.02.1.01/0.0/0.0/16_013/0001823) and the equipment and the base of research infrastructure IPMinfra were used during the research activities.Fused filament fabrication (FFF) is a type of extrusion-based additive manufacturing technique also known as fused deposition modeling (FDM) or 3D-printing. It is possible to use the process of additive manufacturing for manufacturing of prototypes and also the final products. It is widely believed that parts produced by this method have the disadvantage of slightly worse mechanical properties because of consisting of many weld-lines in layers. However, newer studies confirm that this negative effect can be significantly reduced by appropriate choice of welding conditions of the printing process [3]. Mechanical properties like ultimate tensile strength, modulus, etc. of printed parts can then be similar to properties of injection molded or compressed parts

Tracing Electron-Ion Recombination in Nanoplasmas Produced by Extreme- Ultraviolet Irradiation of Rare-Gas Clusters

We investigate electron-ion recombination in nanoplasmas produced by the ionization of rare-gas clusters with intense femtosecond extreme-ultraviolet (XUV) pulses. The relaxation dynamics following XUV irradiation is studied using time-delayed 790-nm pulses, revealing the generation of a large number of excited atoms resulting from electron-ion recombination. In medium-sized Ar-Xe clusters, these atoms are preferentially created in the Xe core within 10 ps after the cluster ionization. The ionization of excited atoms serves as a sensitive probe for monitoring the cluster expansion dynamics up to the ns time scale