Autores – Fabio Andre Ludolf Cacais, Arlindo Rebelo, Anderson Beatrici, Victor Loayza, Davi Quintão
Palavras-chave: New SI, kilogram dissemination, mass stability
Resumo: Inmetro’s mass laboratory (Lamas) participated in SIM Kilogram Dissemination Project (SKDP). The assessment of mass stability of the SIM21 1 kg stainless steel mass standard was carried out between 2018 and 2021.
Autores: Maria Helena Farias, Jordana Colman
Palavras-chave: microreômetro capilar, metrologia, fluido não-Newtoniano, microPIV, microfluidica
Resumo: Este trabalho aborda, em caráter teórico, uma metodologia para determinar características reológicas de fluidos não-Newtonianos em escoamento no interior de microcanais, com o uso de viscosímetro capilar differencial multifuncional associado a medições do perfil de velocidades do escoamento pela técnica de velocimetria por imagem de partículas em microescala (microPIV). O dispositivo multifuncional proporciona ganhos para a rotina laboratorial de investigação de fluidos complexos, pela praticidade e versatilidade.
Autores: Pablo Antunes da Rosa, Carla Abdo Brohem, Leandro Campos Gonçalves
Palavras-chave: Background-oriented Schlieren (BOS), Spray characteristics, Perfumery
Resumo: The Background-oriented Schlieren (BOS) method is used in this work to evaluate the dimensions of a perfume spray profile. With the intention of investigate the best combination of capture environment, the technique was applied to scenarios where the background (striped, randomly distributed dots and image) and the lighting conditions (daylight, horizon light and fluorescent) were varied. Each test was recorded with a video camera, and after selecting the reference and interest frames, the absolute saturation subtraction technique was applied to the images. Subsequently the resulting image was passed through a smoothing filter. The results showed that the combination of striped background with fluorescent illumination was the closest, with a bias of approximately 2%, to the result obtained through the conventional method, which uses a bulkhead to capture the approximate profile of the spray and subsequent calculation of the angle. The illumination horizon light, on the other hand, did not allow the visualization of the spray for any of the backgrounds used. The BOS technique proved to be an important tool in evaluating the performance of perfumery items.
Autores:Pablo Antunes da Rosa, Marcia Priscila Porto Dos Santos, Leandro Campos Goncalves, Carla Abdo Brohem
Palavras-chave: Vibration, Packaging test, Transport simulation
Resumo: The main purpose of packaging is to keep the product protected from external actions, contamination, and leakage. Therefore, they must be designed to deliver undamaged products to the customer, even after transportation and handling. The main damage is caused by the vibratory forces that occur during transportation. Therefore, this study aimed to quantify and analyse the vibration that occurs during road transport in a semi-trailer truck. The route selected was between Grupo Boticario’s factory in São José dos Pinhais (PR) and its distribution center in São Gonçalo dos Campos (Bahia), totalling around 1930 km. Thusly, it was possible to reproduce the same damage caused in an accelerated laboratory-scale test. The results showed that the vibration levels, and consequently the damage caused, vertically were higher than the lateral and longitudinal levels, as expected. This study allowed the definition of the parameters for the transportation simulator test carried out in package development and validation.
Autores: Anderson Beatrici
Palavras-chave: Weighing chamber, mass calibration, thermic stabilization.
Resumo: The calibrations or checking of mass standards with nominal values greater than 10 kg and high accuracy class require special attention to the environmental conditions stability due to the their volume. The equipment used to calibrate this kind of mass standards usually has a weighing chamber (in this case a glass campanula or bell jar) to avoid, at least to reduce, the effects of environmental changes. In this study will be present the effects of these weighing campanulas on the standard deviations and in mass measurements results using only the internal tare (without weights in the balance plate) and using two 10 kg test weights.
Autores: Jorge Trota Filho, Luanda Silva de Moraes, Sérgio Pinheiro de Oliveira, Rômulo Queiroz Fratari, Marcela Carrera de Castro
Palavras-chave: Mechanical Properties of Polystyrene , Sulfonated Graphene Oxide Composite
Resumo: Composite materials are intended to provide a material with different and optimized mechanical, chemical, and physical-chemical properties in relation to its constituents. The aim of this work is to evaluate the mechanical properties of a composite that uses polystyrene as the matrix and the reinforcements used are of two types: sulfonated graphene oxide and graphite ones. The mechanical properties of composite materials obtained by tensile testing were compared with that one of pure polystyrene. Thus, it was possible to observe that some formulations presented better mechanical properties that were able to generate a material with greater degradability in the environment.
Autores: Eduardo Gonçalves Machado, Sandro Cardoso Santos, Isabela Corrêa Castro, Renan Bueno Wojciechowski
Autores: Marcio Antonio Sens, Carlos Frederico Trotta Matt
Autores: Anderson Beatrici
Autores: Marcella Rocha, Davi Quintã
Autores: Fabio Andre Ludolf Cacais, Victor Loayza, Anderson Beatrici, Davi Quintão, Arlindo Rebelo
Autores: Arlindo dos Santos Rebelo Júnior