Design of an energy absorption system for the landing of space exploration modules

Mon, 15 Apr 2024 00:00:00 +0000

Currently, space exploration is becoming an increasingly important activity since it allows increased knowledge regarding the formation of planets, economic activities (space mining) as well as a better understanding of geological and biological phenomena that allow the creation of space in the future of human habitats outside planet Earth. In this sense, one of the main problems of space exploration is associated with the safe landing of space probes. Based on the above, this article proposes the design of a passive type of energy absorption system based on plastic deformation of aluminum structural profiles. For this purpose, structural profiles with various geometric shapes were individually designed and evaluated using the Abaqus finite element software. The numerical evaluation was carried out through compression tests in conjunction with the calculation of the main impact resistance parameters. The results showed a better performance of the HSC-1 profile which obtained the best crushing force efficiency (CH-C) equal to 0.83. From the above, it was implemented in a discrete model of a generic space lander.

Zinc oxide and silver oxide nanoparticles for skin sunscreen use

Tue, 02 Apr 2024 00:00:00 +0000

This article is about the use of nanoparticles for the development of sunscreen for skin care based on zinc oxide nanoparticles and silver oxide nanoparticles, with antioxidant, antimicrobial, anti-inflammatory, and healing effects, using ZnO which is proposed to be synthesized through the hydrothermal method and Ag2O nanoparticles by constant agitation, through characterizations such as XRD, Uv-vis, Raman and pH measurement, we will seek to obtain data about our nanoparticles and the final product which is a sunscreen for skin care; The characterizations will provide data such as the crystalline phase, the degree of absorbance, and the chemical structure of the nanoparticles. According to the literature, zinc oxide nanoparticles decorated with silver oxide nanoparticles for topical use have properties that generate the effects above (antioxidant, antimicrobial, anti-inflammatory, and healing). Currently, several sunscreens use zinc oxide and some others silver oxide, which is why the present proposal seeks to apply both materials at a nanometric scale for the elaboration of a cream that, it is expected, in the future can be used for people with skin problems, such as dermatitis, including the possibility of using it for diabetics.

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Design of an energy absorption system for the landing of space exploration modules

Zinc oxide and silver oxide nanoparticles for skin sunscreen use