Journal of Achievements in Materials and Manufacturing Engineering最新文献

{"title":"Post-processing in multi-material 3D printing","authors":"E. Brancewicz-Steinmetz, J. Sawicki","doi":"10.5604/01.3001.0053.5953","DOIUrl":"https://doi.org/10.5604/01.3001.0053.5953","url":null,"abstract":"This study aims to investigate the adhesion of combining two materials with different properties (PLA-TPU and TPU-PLA) printed in FFF (fused filament fabrication) with post-processing treatments.The scope of the study includes making variants of samples and subjecting them to three different post-printing treatments. After processes, shear tests were conducted to determine the adhesion.The post-printing treatment results in a stronger inter-material bond and increased adhesion strength; the best average shear strength results were achieved for annealing without acetone and for PLA/TPU samples for treatment in cold acetone vapour.In the study, adhesion was considered in the circular pattern of surface development.Reinforcement of the biopolymer broadens the possibilities of using polylactide. Examples of applications include personalised printing items, where the elastomer will strengthen the polylactide.These studies aim to promote the use and expand the possibilities of using PLA biopolymer. The strength properties of printouts from different materials are often insufficient, hence the proposal to use post-printing processing.","PeriodicalId":14825,"journal":{"name":"Journal of Achievements in Materials and Manufacturing Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90854132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of methods for predicting hydrate formation in gas storage facilities and measures for their prevention and elimination","authors":"V. Volovetskyi, Ya. Doroshenko, S. Matkivskyi, P. Raiter, O. Shchyrba, S. Stetsiuk, H. Protsiuk","doi":"10.5604/01.3001.0053.5955","DOIUrl":"https://doi.org/10.5604/01.3001.0053.5955","url":null,"abstract":"The purpose of this work is to study the processes of hydrate formation during the operation of wells and underground gas storage facilities. Development of a set of measures aimed at the prediction and timely prevention of hydrate formation in wells and technological equipment of gas storage facilities under different geological and technological conditions.The prediction of hydrate formation processes was carried out using a neural network that is a software product with weight factors calculated in MATLAB environment and the ability to adapt parameters of the network specified to updated and supplemented input data during its operation. So, within the MATLAB software environment, a software module of a two-layer artificial neural network with a random set of weight factors is created at the first stage. In the second stage, the neural network is trained using experimental field input/output data set, output data. In the third stage, an artificial neural network is used as a means of predicting hydrate formation with the ability to refine weight factors during its operation subject to obtaining additional updated data, as an input set, for modifying the coefficients and, accordingly, improving the algorithm for predicting of an artificial neural network. In the absence of new data for the additional training of an artificial neural network, it is used as a computing tool that, on the basis of input data about the current above-mentioned selected technological parameters of fluid in the pipeline, ensures the output values in the range from 0 to 1 (or from 0 to 100%), that indicates the probability of hydrates formation in the controlled section of the pipeline. Application of such an approach makes it possible to teach; additionally,, that is, to improve the neural network; therefore this means of predicting hydrate formations objectively increases reliability of results obtained in the process of predicting and functioning of the system.The authors of the work recommend to carry out an integrated approach to ensure clear control over the operation mode of wells and gas collection points.According to the results of experimental studies, the places of the most likely deposition of hydrates in underground gas storage facilities were identified, in particular, in the inside space of the flowline in places of accumulation of liquid contaminants (lowered pipeline sections) and an adjustable choke of the gas collection point. The available methods used to prevent and eliminate hydrate formation both in wells and at gas field equipment were analyzed. Such an analysis made it possible to put together a list of methods that are most appropriate for the conditions of gas storage facilities in Ukraine.The method of predicting hydrate formation in certain sections of pipelines based on algorithms of artificial neural networks is proposed. The developed methodology based on data on values of temperatures and pressures in certain sections of pipelines allows ","PeriodicalId":14825,"journal":{"name":"Journal of Achievements in Materials and Manufacturing Engineering","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89826149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Redesign of iron for assembly cost and time reduction using DFA","authors":"R. Ginting, R. Silalahi","doi":"10.5604/01.3001.0053.5954","DOIUrl":"https://doi.org/10.5604/01.3001.0053.5954","url":null,"abstract":"Nowadays, product development is very important to remain competitive in the market, one of which is to reduce the assembly of time and cost design. This article discusses the study of iron products on the market. Based on the problems found in the SMEs of Electronic Services, this iron has many components and complex designs that take time-consuming to assemble. Therefore, the purpose of this article is to redesign the ironing.Improvements to the design of iron products are based on the problems present in this product. This problem is obtained by distributing questionnaires to Electronic Services SMEs. The improvements are carried out using the Design for Assembly (DFA) method to evaluate the design with ease of assembly processes.This paper attempt to improve the design of ironing products according to the problems obtained from the initial questionnaire, which is to reduce the assembly time and costs using DFA.The result of these improvements is a reduction in the amount of assembly time and costs and an increase in efficiency. The actual design assembly time is 358.16 to 269.70 seconds on the proposed design. The actual design assembly cost budget is 956.81,- rupiahs, reduced to 720.50, in the proposed design. Then the actual design efficiency of 21.77% increased to 24.74%.Iron design improvements are based on problems and complaints received from the electronic services SMEs, then analysed using the DFA method. Therefore, the improvements in the design of the ironing product are present in two components, that is the back cover and the handle.","PeriodicalId":14825,"journal":{"name":"Journal of Achievements in Materials and Manufacturing Engineering","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91115787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of the impact of removable partial dentures on the oral health-related quality of life of older adults","authors":"M. Selmani Bukleta, D. Bukleta, M. Selmani","doi":"10.5604/01.3001.0053.4034","DOIUrl":"https://doi.org/10.5604/01.3001.0053.4034","url":null,"abstract":"This study aimed to determine the effect of metal base removable partial dentures (MRPDs) and acrylic base removable partial dentures (ARPDs) on oral health-related quality of life.The study was conducted on 40 patients. Twenty received ARPDs (nine in the maxilla and eleven in the mandible), and twenty received MRPDs (nine in the maxilla and eleven in the mandible). The patients were 4565 years old. The impact of RPDs on the patient's quality of life was analysed with the Oral Health Impact Profile (OHIP-ALB14) questionnaire.The differences in OHIP-14 between the two dentures at three different time points were estimated. All statistical analyses were performed using SPSS software, version 22 (IBM), and a p-value<0.05 was considered statistically significant.The OHIP-ALB14 score for both denture types was high at T1 and then remarkably decreased at T2 (p<0.05) and T3 (p<0.05), with no significant differences between MRPDs and ARPDs users. For ARPD users, the satisfaction level significantly increased (<0.001) after one year for the dimensions of Physical Pain, Functional limitation, and Psychological Discomfort. Whereas, for MRPD users, satisfaction level significantly increased (<0.001) in the dimensions of Functional limitation, Psychological Discomfort, and Psychological Disability after a year of denture use.The findings from this study can be taken as the first step towards future research with a longer post-operative follow-up that can analyse the differences between dentures if any.The comparative analysis between ARPD and MRPD and their impact on the oral soft tissues will help prosthodontists reach accurate treatment decisions.This study has not been conducted in the region of Kosovo before. Moreover, the engineers manufacturing dental prostheses will know about the effect of their product on oral health.","PeriodicalId":14825,"journal":{"name":"Journal of Achievements in Materials and Manufacturing Engineering","volume":"219 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74176411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of selected properties of PLA used in 3D printing","authors":"K. Sośniak, D. Biela, D. Szalaty, M. Ścieszka, M. Polok-Rubiniec, A. Włodarczyk-Fligier, A. Kania","doi":"10.5604/01.3001.0053.4035","DOIUrl":"https://doi.org/10.5604/01.3001.0053.4035","url":null,"abstract":"This study focuses on determining the best possible structure of the orthosis made with FDM 3D printing technology. To produce the samples, a thermoplastic PLA material was selected that met the conditions of biodegradability, biocompatibility and non-toxicity. The samples produced were subjected to a tensile strength test and corrosion resistance.Studies based on FEM analysis were carried out using the advanced engineering software CAE - Inventor. The samples were designed in the CAD system, while the G-Code path was generated using the PrusaSlicer 2.5.0 program dedicated to the Prusa i3 MK3S+ printer, which was used to create the models. Surface morphology observations of PLA were carried out with a Zeiss SUPRA 35 scanning electron microscope (SEM). The static tensile test was performed on the Zwick/Roell z100 device based on the PN-EN ISO 527:1 standard. Electrochemical corrosion tests were carried out using the Autolab PGSTAT302N Multi BA potentiostat in Ringer solution at a temperature of 37C.The research allowed the appropriate structure of the orthosis made of PLA polymer material using 3D FDM printing technology. The static tensile test, SEM and corrosion tests confirmed the correct application of this material for the selected purpose. It was possible to determine that samples with holes of 10 mm had the highest strength properties. Due to the tensile tests, the average tensile strength of those samples was around 61 MPa. The corrosion parameters of PLA were determined using Tafel analysis.The research methodology proposed in work can be used to study other biomedical materials. The results presented can be the basis for further tests in order to search for the best orthopaedic stabiliser.The innovative part of the article are three different versions of structures intended for making orthoses used in medicine.","PeriodicalId":14825,"journal":{"name":"Journal of Achievements in Materials and Manufacturing Engineering","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80727282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controlled drug delivery systems for improved efficacy and bioavailability of flavonoids","authors":"A. Gopikrishna, A. Girigoswami, K. Girigoswami","doi":"10.5604/01.3001.0053.4033","DOIUrl":"https://doi.org/10.5604/01.3001.0053.4033","url":null,"abstract":"In past decades, experiments have been done to find the properties of plant polyphenols and their protective role in various diseases. In the present study, a brief review has been done on flavonoids protective role in different diseases and controlled drug delivery systems that can be feasible for improving flavonoids bioavailability as well as their efficacy in the biological system.Keywords searched in PubMed, and Google Scholar are Flavones and cardiovascular diseases, flavones and neurodegenerative diseases, isoflavones and neurodegenerative diseases, Flavonoids and ageing, Flavonoids and diseases, total flavonoid content in vegetables, total flavonoid content in fruits, controlled drug delivery system and flavonoids and the significant recent articles are selected for writing this review.Flavonoids are active components present in plant products that have been found to exert several health benefits, especially in retarding the deleterious effects of CVD, cancer, ageing, diabetes, and neurodegenerative diseases. The different clinical studies have also supported the above notions, and in this commentary, we have highlighted some important findings in the field of flavonoid research. Even though it has various bioactive efficacy, most flavonoids have less bioavailability, requiring controlled drug delivery methods that can also improve flavonoids' bioavailability and stability. pH-, electro-, infrared radiation-, redox- responsive methods of controlled drug release systems are some of the valuable techniques for improving the rate of drug release and bioavailability at the targeted site.Research is warranted in this field for improving and developing various materials that can be utilized in the formation of scaffolds/polymers that improves drug loading and controlled drug release properties at the targeted site.This review will help the readers to design new strategies in flavonoid research with the help of controlled drug release methods for increased bioavailability and rate of drug release/ controlled drug release.","PeriodicalId":14825,"journal":{"name":"Journal of Achievements in Materials and Manufacturing Engineering","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83541996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Culture on construction objects","authors":"J. Obolewicz, A. Baryłka, M. Szota","doi":"10.5604/01.3001.0053.4036","DOIUrl":"https://doi.org/10.5604/01.3001.0053.4036","url":null,"abstract":"The purpose of this paper is to discuss the problem of culture in the workplace, which has been becoming increasingly popular recently.Culture has many meanings and synonyms in the Polish language - we can talk about good manners, rules of savoir-vivre, social etiquette, or politeness. Most people intuitively know how to behave in situations outside of work. In recent years, discussions about culture in the workplace have appeared more often. It is particularly relevant in the construction industry at a time when new forms of employment are emerging and many organisations are undergoing restructuring processes.It results in, among others, high staff turnover, the employment of more contract workers, frequent changes in the working environment, and working on different construction sites. In such cases, the direct and long-term impact of supervision on maintaining safe and cultural working conditions is increasingly limited. The responsibility should be borne by all site personnel, who should adopt an attitude of active and continuous concern for the culture and safety of their own behaviour and that of others and be personally involved in the process of developing cultural and safe attitudes on construction sites. The article defines culture and suggests its application on construction sites.Consequences include high rates of staff turnover, the need to bring in outside contractors, constant shifts in the workplace culture, and the need to work at many sites. The ability of supervision to provide a safe and satisfactory work environment, both now and in the future, is diminished under those circumstances. All construction workers should take responsibility and adopt an attitude of active and continuous concern for the culture and safety of their behaviour and that of others and be personally involved in the process of shaping cultural and safe attitudes on construction sites.The paper defines culture and proposes its use on construction sites.","PeriodicalId":14825,"journal":{"name":"Journal of Achievements in Materials and Manufacturing Engineering","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73400285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the effects of nano-blast furnace slag powder on the behaviour of composite cement materials","authors":"M. Kadhim, L. M. Hasan, H. Kamal","doi":"10.5604/01.3001.0016.3392","DOIUrl":"https://doi.org/10.5604/01.3001.0016.3392","url":null,"abstract":"Attributable to the depletion of raw materials and for sustainability purposes in construction works. Therefore, this study looked into the effects of nano blast furnace slag (BFS) on the microstructure, mechanical properties, and durability of mortar. BFS was substituted for cement at various weight percentages of 0, 1, 1.5, 3, 5, and 7%.A suspension of water and Nano blast furnace slag was made using ultrasonic mixers to prepare the samples. The suspension was combined with cement and sand using 1 cement, 0.5 water, and 2.75 sand in the mixture to make cement mortar. The mixture was then shaped, left in the mould for 24 hours, and then allowed to cure for 7, 14, 28, 60, and 91 days. SEM was used to investigate the microstructure before and after cement replacement. The mechanical characteristics were evaluated by testing the compressive strength and the surface hardness. While the durability was assessed using the water absorption ratios.The results revealed that increasing the BFS in the mortar improved mechanical characteristics and durability by up to 3% of BFS. Replacing Nano-blast furnace slag for a portion of the cement is a proposed solution to address the problems of environmental pollution and resource consumption caused by cement production.Another sustainable material needs to be used for additional investigation. We may evaluate more properties and use different weight percentages.Each year, a significant amount of slag is produced as a result of the iron industry, endangering the environment. There have been numerous initiatives to reduce slags negative environmental consequences. Using slag to replace some of the cement is one of the options to eliminate this byproduct and reduce excessive cement use.This study investigates the possibility of using a blast furnace blast within the Nanoscale to replace some of the cement used in the construction due to the positive impact on the environment to get rid of industrial byproducts and decrease the use of cement.","PeriodicalId":14825,"journal":{"name":"Journal of Achievements in Materials and Manufacturing Engineering","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85572994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Safe operation of buildings during the winter period","authors":"J. Obolewicz, A. Baryłka, M. Szota","doi":"10.5604/01.3001.0016.3402","DOIUrl":"https://doi.org/10.5604/01.3001.0016.3402","url":null,"abstract":"The article presents legal regulations and principles for the safe operation of buildings in winter and proposes a procedure for clearing snow from flat roofs.The Construction Law regulates the activities involving building design, construction, maintenance, and demolition and defines the operation principles of public administration bodies in these areas.The safety of buildings in the winter requires specialist knowledge and special care on the part of managers, employers, persons managing employees, and employees performing work related to their safe operation.The safe removal of snow from flat roofs requires adequate legal knowledge, skills, training, and experience on the part of employers, managers, and workers.The employer's most important obligations to employees in the case of snow clearance work on flat roofs (tantamount to work at height) include providing them with protective equipment appropriate to their position and tasks, with collective protective equipment. The employer is obliged to ensure that persons who carry out work at height are assisted by other employees who do not carry out such work directly. The employer should also ensure that workers receive instruction, taking into account, in particular, the personal division of work, the sequence of tasks to be performed, and the health and safety rules necessary for the various activities. It is also necessary to establish supervision of work at height.Employees carrying out snow clearing should have a current height examination and hold a valid (current) medical certificate of no contraindication to work at height. The employee must also receive health and safety training prior to working at height, as well as an introduction to the specifics of the job, know the potential hazards and risks, and learn to use the personal protective equipment required for the job properly.","PeriodicalId":14825,"journal":{"name":"Journal of Achievements in Materials and Manufacturing Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88714356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of ultrasonic and other atomization methods in metal powder production","authors":"B. Bałasz, M. Bielecki, W. Gulbiński, Ł. Słoboda","doi":"10.5604/01.3001.0016.3393","DOIUrl":"https://doi.org/10.5604/01.3001.0016.3393","url":null,"abstract":"The results showed that the UA powder has a finer average particle size with a narrower statistical distribution of particles than those made by the GA method. Because the UA powder has a higher sphericity and lower porosity, Generally, UA offers better-quality powders in terms of properties such as higher tap density, better flowability and low oxygen content.Ultrasonic atomization (UA) with melting raw material by an electric arc. Characterisation of the powders: particle size distribution (PSD), density, and flowability were carried out. Other parameters, such as microstructure, deviation in the chemical composition and powder surface morphology, were also investigated.The results showed that the UA powder has a finer average particle size with a narrower statistical distribution of particles than those made by the GA method. Because the UA powder has a higher sphericity and lower porosity, Generally, UA offers better-quality powders in terms of properties such as higher tap density, better flowability and low oxygen content.As an example of semi-industrial scale application of the UA system, the Ti6Al4V and TiAl powders were produced after remelting the wire. The UA system is commercially available for processing any metallic material.The test campaign results showed that the Ti6Al4V powder produced by the ultrasonic atomisation has a similar or better quality as those available from large-scale gas atomisation plants.The new method of UA powder production was analysed in terms of key powder parameters. The properties of the titanium-based powder produced this way were analysed with a view to future applications.","PeriodicalId":14825,"journal":{"name":"Journal of Achievements in Materials and Manufacturing Engineering","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80387814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}