The 3D printing process allows obtaining parts with different interior structures and made of different materials. Such parts can be used to avoid overheating of various objects under the action of thermal radiation. The existence of different internal structures of the parts, as well as the 3D printing conditions and the distinct physical properties of the materials used, determine a different behavior of the parts in terms of their thermal insulation capacity. To obtain an image of the thermal conductivity of thin parallelepiped-shaped parts achieved by 3D printing, experimental research is conceived and materialized. The experiments involve the use of an infrared heat source, respectively, measurement of temperature on the surface opposite to that exposed to thermal radiation. The obtained results are mathematically processed to obtain empirical mathematical models that would highlight 3D printed parts' ability to be used as thermal insulating materials.
The properties of the material most often influence the use of a particular material to manufacture a part, and the quality reflected in part obtained behavior. In plastics, their diversity and specific characteristics, which are sometimes influenced by the additives used, do not ensure resistance to mechanical stress and some mechanical properties specific to metallic materials. For such reasons, the use of plastics is limited, but research and development in this area show that there is potential to improve plastics' properties. To observe the characteristics of a material and the performance in use it can have, laboratory tests and research are important, and the observations are beneficial. Experimental tests are designed and performed to evaluate the wear resistance of some samples obtained by 3D printing. By the mathematical processing of the results, it is possible to identify empirical mathematical models capable of providing information about the intensity of the influence of different factors on the abrasive wear resistance of the materials incorporated in the samples obtained by 3D printing.
The development of 3D Printing technologies introduced new possibilities regarding multi-material part production. Fused Filament Fabrication (FFF) is one of those technologies suitable for multi-material 3D printing. Usually, multi-material parts are manufactured from different blends of the same material, also known as multi-colour 3D printing, or from materials with good chemical compatibility. Conventionally, a simple face-to-face bond interface between parts’ bodies and a chemical bond between thermoplastics define the mechanical performance of multi-material components. In this regard, the paper aimed to investigate the strength of the contact interface of multi-material specimens using a geometrical approach. Therefore, multiple interlocking interfaces were investigated, such as omega shape, T-shape, dovetail, and others for samples made of low-compatibility thermoplastic materials, acrylic styrene-acrylonitrile (ASA), thermoplastic polyurethane (TPU). The results showed that macroscopic inter-locking interfaces are significantly increasing the mechanical properties.
Bearing bushing parts are used to support other rotating moving parts. When these bearing bushings are made of bronze, their inner cylindrical surfaces can be finished by turning. The problem addressed in this paper was that of identifying an alternative for finishing by turning the inner cylindrical surfaces of bearing bushing parts by taking into account the specific sustainability requirements. Three alternatives for finishing turning the inner cylindrical surfaces of bearing bushings have been identified. The selection of the alternative that ensures the highest probability that the diameter of the machined surface is included in the prescribed tolerance field was made first by using the second axiom of the axiomatic design. It was thus observed that for the initial turning alternative, the probability of success assessed by using a normal distribution is 77.2%, while for the third alternative, which will correspond to a Maxwell–Boltzmann distribution, the probability of success is 92.1%. A more detailed analysis was performed using the analytic hierarchy process method, taking into account distinct criteria for assessing sustainability. The criteria for evaluating the sustainability of a cutting processing process were identified using principles from the systemic analysis. The application of the analytic hierarchy process method facilitated the approach of some detailed aspects of the sustainability of the alternatives proposed for finishing by turning the inner cylindrical surfaces of bearing bushings, including by taking into account economic, social, and environmental protection requirements.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.