In this study, the effect of die surface angled hydro-mechanical deep drawing method (HMDDM) on sheet metal cup wall thickness and punch force was investigated as experimental and numerical analysis. In the works, 0.9 mm thick DIN EN 10130-1999 sheet metal material was used. The effect of variables on the test results was investigated by using die surface/blank holder angle, punch nose radius, die shoulder radius, chamber pressure and blank holder force as experimental parameters. Numerical analysis experiments were carried out using ANSYS 15.0 package program. Besides, experiments were performed according to the Taguchi experiment plan and L18 orthogonal array. The obtained data were analysed statistically by ANOVA analysis of variance in MINITAB 17.0 package program, and the effect of each parameter on the results was determined as a percentage. As a result, it was determined that the thinning was approximately 15% at most and the thickening was 10%.
本文通过实验和数值分析，研究了模具面角液压机械拉深法(HMDDM)对板料杯壁厚和冲孔力的影响。工程中采用0.9 mm厚的DIN EN 10130-1999钣金材料。以模面/压边角、凸头半径、模肩半径、腔室压力和压边力为实验参数，研究了各变量对试验结果的影响。采用ANSYS 15.0包程序进行数值分析实验。根据田口实验方案和L18正交阵列进行了实验。所得数据采用MINITAB 17.0包程序方差分析进行统计学分析，以百分比确定各参数对结果的影响。因此，确定了减薄最多约为15%，增厚为10%。
{"title":"Investigation of Sheet Thickness and Punch Force in Die Surface Angled Hydro-mechanical Deep Drawing Method","authors":"Hasan BALLIKAYA, Vedat SAVAŞ, Çetin ÖZAY","doi":"10.31202/ecjse.1232536","DOIUrl":"https://doi.org/10.31202/ecjse.1232536","url":null,"abstract":"In this study, the effect of die surface angled hydro-mechanical deep drawing method (HMDDM) on sheet metal cup wall thickness and punch force was investigated as experimental and numerical analysis. In the works, 0.9 mm thick DIN EN 10130-1999 sheet metal material was used. The effect of variables on the test results was investigated by using die surface/blank holder angle, punch nose radius, die shoulder radius, chamber pressure and blank holder force as experimental parameters. Numerical analysis experiments were carried out using ANSYS 15.0 package program. Besides, experiments were performed according to the Taguchi experiment plan and L18 orthogonal array. The obtained data were analysed statistically by ANOVA analysis of variance in MINITAB 17.0 package program, and the effect of each parameter on the results was determined as a percentage. As a result, it was determined that the thinning was approximately 15% at most and the thickening was 10%.","PeriodicalId":52363,"journal":{"name":"El-Cezeri Journal of Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136338050","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}
Muhammet AYÇİÇEK, Sedef ÇAKIR AYÇİÇEK, Neslihan ÖZSOY, Murat ÖZSOY, Akın AKINCI
This paper aimed to examine and develop the tribological behaviour by adding nano reinforcements into the polyester matrix. Nanocomposite materials were obtained by adding nano-sized, 0.5%, 1%, 2% SiO2 and ZrO2 reinforcements to isophthalic polyester. These materials were mixed with mechanical and ultrasonic methods and poured into open moulds. The coefficient of friction and wear rates were obtained using the pin-on-disc test device. Optical and SEM surface images of the composites were examined. The experiments were conducted at room temperature and an average of 70% humidity. Tribological studies were made under a load of 2, 5, 10N and at a sliding speed of 0.5 and 0.1 m/s. It was seen that the nano reinforcements to the polyester matrix improved the tribological properties of the material.
{"title":"Comparison of Tribological Behaviours of Nano SiO2 and ZrO2 Reinforced Polyester Matrix Composite Materials","authors":"Muhammet AYÇİÇEK, Sedef ÇAKIR AYÇİÇEK, Neslihan ÖZSOY, Murat ÖZSOY, Akın AKINCI","doi":"10.31202/ecjse.1230975","DOIUrl":"https://doi.org/10.31202/ecjse.1230975","url":null,"abstract":"This paper aimed to examine and develop the tribological behaviour by adding nano reinforcements into the polyester matrix. Nanocomposite materials were obtained by adding nano-sized, 0.5%, 1%, 2% SiO2 and ZrO2 reinforcements to isophthalic polyester. These materials were mixed with mechanical and ultrasonic methods and poured into open moulds. The coefficient of friction and wear rates were obtained using the pin-on-disc test device. Optical and SEM surface images of the composites were examined. The experiments were conducted at room temperature and an average of 70% humidity. Tribological studies were made under a load of 2, 5, 10N and at a sliding speed of 0.5 and 0.1 m/s. It was seen that the nano reinforcements to the polyester matrix improved the tribological properties of the material.","PeriodicalId":52363,"journal":{"name":"El-Cezeri Journal of Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135023060","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}
The hydrolysis of 4-nitrophenyl N-acetyl-4-methylbenzenesulfonimidate in aqueous 20%, 40%, and 60% (v/v) dioxane solutions of mineral acids was investigated. Rate maxima are observed for both perchloric and sulfuric acids since hydrolysis was studied over a wider range of acidity in 20%, and 40% (v/v) dioxane. Similarly, rate maxima are observed perchloric and hydrochloric acid in 60% (v/v) dioxane at high acid concentration. Analyses of the data by the Cox–Yates excess acidity method and temperature effects indicate hydrolysis by an A-2 mechanism.
{"title":"Investigation of Acid-Catalyzed Hydrolysis of 4-Nitrophenyl-N-Acetyl-4-Methylbenzenesulfonimidate in Dioxane-Water Solutions","authors":"Seyhan ÖZTÜRK, Halil KÜTÜK","doi":"10.31202/ecjse.1269612","DOIUrl":"https://doi.org/10.31202/ecjse.1269612","url":null,"abstract":"The hydrolysis of 4-nitrophenyl N-acetyl-4-methylbenzenesulfonimidate in aqueous 20%, 40%, and 60% (v/v) dioxane solutions of mineral acids was investigated. Rate maxima are observed for both perchloric and sulfuric acids since hydrolysis was studied over a wider range of acidity in 20%, and 40% (v/v) dioxane. Similarly, rate maxima are observed perchloric and hydrochloric acid in 60% (v/v) dioxane at high acid concentration. Analyses of the data by the Cox–Yates excess acidity method and temperature effects indicate hydrolysis by an A-2 mechanism.","PeriodicalId":52363,"journal":{"name":"El-Cezeri Journal of Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135308089","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}
In this study the effect of soil-structure interaction on seismic performance is investigated considering a 15 story building incorporating base and mid-story seismic isolation. The cases that are taken into account are; fixed base model, base isolated model and base and mid-story isolated model. All three models are analyzed by excluding and including soil-structure interaction. Three different earthquakes are used for the time-history analysis. It is concluded that the seismic performance is enhanced by the implementation of base and mid-story isolation to the structure. In addition, it is observed that soil-structure interaction had a small effect on seismic performance of the structure depending on the base soil type.
{"title":"Simple Soil Effect Analysis in a Base and Mid-Story Isolated 15 Story Building","authors":"Arcan YANIK, Hakan TOPALOĞLU","doi":"10.31202/ecjse.1230014","DOIUrl":"https://doi.org/10.31202/ecjse.1230014","url":null,"abstract":"In this study the effect of soil-structure interaction on seismic performance is investigated considering a 15 story building incorporating base and mid-story seismic isolation. The cases that are taken into account are; fixed base model, base isolated model and base and mid-story isolated model. All three models are analyzed by excluding and including soil-structure interaction. Three different earthquakes are used for the time-history analysis. It is concluded that the seismic performance is enhanced by the implementation of base and mid-story isolation to the structure. In addition, it is observed that soil-structure interaction had a small effect on seismic performance of the structure depending on the base soil type.","PeriodicalId":52363,"journal":{"name":"El-Cezeri Journal of Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135139275","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}
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