Applied Mechanics and Materials最新文献

{"title":"Experimental Study on the Effect of Process Parameters on the Build Time and Part Accuracy of Direct Metal Laser Sintering Components","authors":"Tata Nancharaiah, V. Sudheer Kumar Reddy, T. Chakravarthi, G. Tarun Sai Chowdary, Y. Brahma Teja","doi":"10.4028/p-fzsqm6","DOIUrl":"https://doi.org/10.4028/p-fzsqm6","url":null,"abstract":"3D printing is an emerging technology that creates parts straight from CAD models. Direct Metal Laser Sintering (DMLS) is a 3D printing method that is becoming increasingly popular in the aerospace, medical, and orthopedics sectors. These are usually focused on precise, long-lasting, and lightweight parts. DMLS is an Additive Manufacturing (AM) technique that employs a laser to sinter a selected area of a metallic powder layer by layer to produce the required metal components. The heating power of the laser was discovered to have a strong effect on phase formation. The major issue with this process is that high residual and large deformations are introduced to the components during manufacturing. This causes a change in the fatigue strength of a part and can even lead to cracks. The quality of the DMLS parts is affected by various process parameters. In this study, the design of experiments is used to investigate the consequences of process parameters used in the DMLS process to make metal parts. Process parameters such as laser power and scanning speed must be identified because they have the largest influence on the part's characteristics. (Build time, part accuracy). The change in the controlling parameters, or process parameters, in the DMLS method, has been found to affect material properties, according to a literature review. Thus, in the proposed work, three process parameters laser speed, scanning speed, and hatching distance are taken into account at two distinct levels. L4 orthogonal arrays are used in the studies. Experimental research is done on the manufacturing process, build time and component accuracy. Finally, the impact of each parameter on the quality aspects is discussed based on the experimental findings.","PeriodicalId":8039,"journal":{"name":"Applied Mechanics and Materials","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135859092","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":"Structure of the Device and Experimental Research of Verifying the Functionality of Elements of Easy-Dropped Construction","authors":"Dmytro Dobriak, Vadym Nizhnyk, Serhii Pozdieiev, Oleksandr Nikulin","doi":"10.4028/p-vosj09","DOIUrl":"https://doi.org/10.4028/p-vosj09","url":null,"abstract":"This article analyzes the current state of explosion protection in the world. As a result of the analysis, it was determined that the main modern method of explosion protection is the use of easy-dropped construction (hereinafter - EDC ). There are various methods for calculating the required area of the EDC, but to confirm the reliability of the calculations, the selection of the material that performs the function of the EDC, geometrical parameters and excess pressure of operation, it is necessary to conduct experimental research. The existing experimental devices for testing EDC for excess explosion pressure are given. The designs and drawbacks of these devices are considered. The design features of the constructed unit for checking the functionality of elements of easy-dropped construction (hereinafter referred to as the unit) and the main advantages compared to other experimental units are described. A scheme of the device and its structure is given. The required amount of propane-butane was calculated to obtain an excess explosion pressure of 5 kPa. Based on the results of the tests, a graph of the change in the excess pressure of the explosion over time is plotted and the value of the excess pressure of the explosion in a closed volume depending on the concentration of the gas mixture of propane-butane with air, which is formed in the closed volume, and the change in the excess pressure of the explosion after the activation of the EDC were investigated. A graph of the influence of the concentration of the gas-air mixture on the excess pressure acting on the EDC is plotted. The design parameters of the device and its location, the limit values of the excess pressure of the explosion, the minimum amount of gas to create the required excess pressure of the explosion are substantiated. The considered device provides an experimental determination of the values of the overpressure of the operation of EDC of typical sizes and allows conducting experimental research of the operation of the EDC under the influence of various values of the overpressure of the explosion with the required accuracy.","PeriodicalId":8039,"journal":{"name":"Applied Mechanics and Materials","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135858348","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":"The Effect of Fermentation on Increasing the Physico-Chemical Quality of Fish Feed Based on Food Waste","authors":"M. D. Cahya, Yuli Andriani, Risdiana Risdiana, Nia Rossiana, Muhamad Fatah Wiyatna","doi":"10.4028/p-VX5Nyu","DOIUrl":"https://doi.org/10.4028/p-VX5Nyu","url":null,"abstract":"Fish feed is the crucial aspect of aquaculture activities, 70% of production costs are spent on feed availability. However, the high price of commercial feed causes a decrease in farmers' profits, so a solution is needed to reduce feed costs. Food waste has a good potential to be used as a fish feed material. The fermentation of food waste should improve its quality and ensure that food waste is safe to use as feed material. As a result of various tests of Proximate, FTIR, SEM, and Physical Quality test it has been shown that the fermentation process can significantly improve the nutritional quality of food waste without changing the functional groups and the reduction of the particle size after the fermentation process is also capable to improve the physical quality of feed. We conclude that the fermentation process is the best method of improving the physical and chemical quality of food waste and the addition of fermented food waste meal to feed did not negatively affect the physical quality of feed produced.","PeriodicalId":8039,"journal":{"name":"Applied Mechanics and Materials","volume":"36 1","pages":"63 - 70"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81605962","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":"Investigation on Mechanical Properties of Hybrid Natural Fiber Reinforced Polymer Composite","authors":"Shubhender Singh Yadav, Pankaj Kumar Gupta, Bachchu Lal Gupta","doi":"10.4028/p-s11f9g","DOIUrl":"https://doi.org/10.4028/p-s11f9g","url":null,"abstract":"The use of natural fibers in composite is increasing day by due to eco-friendly nature of the fibres and reuse of waste. Natural fibers can be classified according to their source of origin such as plant fiber, mineral fiber, and animal fiber. In the present article, epoxy was taken as the matrix and wool fiber for reinforcement with flax flax fiber for fabricating the composite using the hand layup technique. The impact of the hybridization of flax and wool fibers on the mechanical properties of natural fiber reinforced polymer composite was investigated. These fibers were blended in varying percentages with fixed fiber content of 5% [(100% flax fiber), (40% wool/60% flax fiber), (50% flax/50% wool fiber), (60% wool fiber/40% flax), (100% wool fiber)] with epoxy resin and sampled as F5, WF23, WF2.5, WF32, and W5 respectively. Tensile strength, flexural strength, and impact strength were investigated through experimentation. All hybrid composites outperformed non-hybrid wool fiber composites in terms of mechanical properties. The wool fiber is poor in mechanical strength which was compensated by high strength of flax fiber.","PeriodicalId":8039,"journal":{"name":"Applied Mechanics and Materials","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136353992","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":"Synthesis of ZnO-Al:TiO2 Materials and their Characterization as Photocatalyst Compounds","authors":"Inovasari Islami, L. N. Ramadhika, A. Aprilia","doi":"10.4028/p-t9jofQ","DOIUrl":"https://doi.org/10.4028/p-t9jofQ","url":null,"abstract":"Photocatalyst activity relates to the active surface area between pollutants and catalyst compounds. The insertion of Al atoms as a substantial defect in ZnO structures can reduce the particle size thus the active surface area increases. Another way to raise the photocatalytic activity of ZnO is by combination with other oxide materials such as TiO2 (Titanium dioxide). In this study, the ZnO-Al:TiO2 powder was successfully prepared via the sol-gel method using zinc acetate dihydrate as a precursor, 0.5wt% of aluminum nitrate nonahydrate as a dopant precursor, and TiO2 anatase. In order to understand the role of the combination of these two metal oxides, the concentration ratio of ZnO-Al and TiO2 was varied by 1:1 (ZAT) and 4:1 (ZA4T) under low (150°C) and high (450°C) temperature calcination. Photocatalytic testing was carried out using a 3.2 ppm methylene blue (MB) solution under UV-A lamp irradiation for 120 minutes. The high calcination temperature facilitates the growth of ZnO-Al. Besides that, the different ratio concentrations and calcination temperatures produce different defect states in each sample. The most optimum results in the photocatalytic activity performed by ZnO-Al:TiO2 150°C (ZAT 15) with degradation rate constant (k) of 0.033/min and efficiency of 97% for MB removal. The unexpected zinc vacancies defect is estimated produce at the samples in high-temperature calcination. This defect type can accelerate electron-hole pair recombination. In Addition, samples with high-temperature calcination were considered to have lower hydroxyl/oxygen bonds on the surface thus affecting the photocatalytic performance.","PeriodicalId":8039,"journal":{"name":"Applied Mechanics and Materials","volume":"31 1","pages":"71 - 80"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73858550","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":"Effect of Wood Sawdust Addition on the Morphology, Mechanical Properties, and Thermal Properties of Mullite-Based Porous Ceramic Filter Candidates for Aluminum Casting Process","authors":"D. Dhaneswara, Kristanto Wahyudi, Muhammad Anis, Jonathan Aditomo, J. F. Fatriansyah","doi":"10.4028/p-oGq8iu","DOIUrl":"https://doi.org/10.4028/p-oGq8iu","url":null,"abstract":"Porous ceramic is a heat-resistant porous material with extensive applications, especially for filtering inclusions in aluminum casting industry. To meet local need for these filters, ceramic foam is fabricated by mixing raw materials including kaolin and chamotte as base material, wood sawdust (WSD) as pore-forming agent (PFA), and carboxymethyl cellulose (CMC) with water as binder. WSD content variable: 0%, 5%, 10%, and 15% was used for this research. The mixture was then formed with dry-press method and sintered at 1200°C to form mullite-based local filters. Characterization of samples morphology, composition, and phase were done using SEM-EDS, XRD, and XRF, while its mechanical and thermal properties were characterized by conducting STA, porosity, coefficient thermal expansion (CTE), permanent linear change (PLC), and flexural strength testing. Results showed an increase of WSD addition on the local filter increased the formation number of open-type pores in fiber form on the ceramic microstructure, no significant heat exchanges from decomposition were detected, increased CTE value from 0,0071 to 0,0371%, PLC from 0,0025 to 0,0345%, apparent porosity from 33,29 to 47,95%, and water infiltration from 18,27 to 33,05%, as well as decreased flexural strength from 13,48 to 6,33 MPa and density from 1.82 to 1.43 g/cm3.","PeriodicalId":8039,"journal":{"name":"Applied Mechanics and Materials","volume":"27 1","pages":"3 - 9"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83308082","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":"Mechanical Property Evaluation of (Jute Fibre, Banana Fibre and Groundnut Husk Powder) Reinforced Composite Material","authors":"Madineni Shanthan Sai, S. P. Kumar, M. Rajesh","doi":"10.4028/p-c8Lmob","DOIUrl":"https://doi.org/10.4028/p-c8Lmob","url":null,"abstract":"This project aims to evaluate the mechanical properties of composite materials reinforced with jute, banana fibres, and groundnut husk powder reinforced with LY556 resin and HY951 hardener. The study investigates the potential of these natural fibres and powders as a replacement for traditional synthetic fibres in the development of lightweight and environmentally friendly composite materials. The composites will be prepared by blending the natural fibres with a thermosetting resin matrix. Four samples are fabricated by using hand lay-up technique. The composition of the composites will be optimized by varying the fibre volume fraction and the ratio of the different types of fibres, and the mechanical properties of these materials will be evaluated using standard ASTM testing procedures. The results of the study will be used to analyze the effects of fibre content, and the inclusion of groundnut husk powder on the mechanical properties of the composites, such as tensile test, flexural test, compression test and hardness test. The findings of this research could contribute to the development of new and improved composite materials that are sustainable, cost-effective, and have desirable mechanical properties for various applications, such as construction, automotive, and packaging industries.","PeriodicalId":8039,"journal":{"name":"Applied Mechanics and Materials","volume":"39 1","pages":"43 - 51"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77288325","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":"Fabrication of Sand and Waste Plastic Composite Based Tile","authors":"Y. R. Reddy, Karamala Usman","doi":"10.4028/p-5HKUOa","DOIUrl":"https://doi.org/10.4028/p-5HKUOa","url":null,"abstract":"Pollution caused by Waste Plastic is one of the major environmental problems being faced by developed as well as developing countries, here tile fabricate samples by using bottle caps, sand, one sample was fabricated by mixing these materials in a metal vessel in the micro oven at 200°C for 20 and 10 min respectively by varying the sand composition, the results are analysed by testing the sample under before and after soaking conditions by ranging the pressure from 100 to 800 KN/m2, results state that sand, wastage plastic tile sample exhibit more strength than Sand and Cement tile sample","PeriodicalId":8039,"journal":{"name":"Applied Mechanics and Materials","volume":"11 1","pages":"35 - 42"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85818279","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":"Materials and Processing Technologies","authors":"Agustinus Agung Nugroho, Tata Nancharaiah","doi":"10.4028/b-nmw0tz","DOIUrl":"https://doi.org/10.4028/b-nmw0tz","url":null,"abstract":"","PeriodicalId":8039,"journal":{"name":"Applied Mechanics and Materials","volume":"122 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139345231","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":"Effect of Starch Content on Morphology, Mechanical Properties, and Thermal Properties of Mullite-Based Porous Ceramic as a Candidate Filter in Aluminum Casting","authors":"Muhammad Anis, Kristanto Wahyudi, Fajar Fatriansyah Jaka, Nur Muhammad Ariq Athallah, Bambang Suharno, Ahmad Azhari, D. Dhaneswara","doi":"10.4028/p-5YnIKN","DOIUrl":"https://doi.org/10.4028/p-5YnIKN","url":null,"abstract":"Research on ceramic filters, needed in the aluminum casting industry because of their ability to filter inclusions, has been done. This study's primary material to make ceramic or local filters is kaolin. The manufacture of local filters in this study uses the dry press method. In this study, potato starch with a composition of 5%, 10%, and 15% acted as a pore-former in the local filter. The local filter burned to a temperature of about 1200°C to obtain the mullite phase. Local filter characterization used SEM, XRD, XRF, and DTA. Several tests were carried out in this study, including Permanent Linear Change (PLC) test, thermal expansion test, flexural strength test, and porosity test. The results obtained in this study show that pores on the local filter are not open, have a prolate shape, and have an average pore size of 10 to 55 m. Burning kaolin up to 1200°C proved successful in obtaining the mullite phase. Another result of this study, the more starch content added to the material, the greater the shrinkage and expansion of the material; the highest shrinkage value on the material is 0.17%, and the highest expansion value of the material is 0,29%, the 15% values owned by potato starch. It is different in the flexural strength value, which has the highest value with 0% potato starch at 14.14 MPa and the lowest value with 15% potato starch at 5.39 MPa.","PeriodicalId":8039,"journal":{"name":"Applied Mechanics and Materials","volume":"16 1","pages":"11 - 18"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79752183","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}