{"title":"AN EVALUATION OF THE WIND ENERGY IN THE NORTH SEA COAST","authors":"A. Diaconita, F. Onea, E. Rusu, Dunărea de Jos","doi":"10.35219/mtd.2019.1.02","DOIUrl":"https://doi.org/10.35219/mtd.2019.1.02","url":null,"abstract":"","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125107624","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 DYNAMIC RESPONSE OF WIND TURBINE GENERATORS FLEXIBLE STRUCTURES TO THE TURBULENT WIND EFFECT","authors":"Emilian Boboc","doi":"10.35219/mtd.2019.1.03","DOIUrl":"https://doi.org/10.35219/mtd.2019.1.03","url":null,"abstract":"","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130946940","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":"ON THE GLOBAL STRENGTH ANALYSIS OF PRELIMINARY DESIGN FOR SEVERAL FLOATING DOCK TYPES","authors":"E. Burlacu, L. Domnișoru, Dunărea de Jos","doi":"10.35219/mtd.2019.1.01","DOIUrl":"https://doi.org/10.35219/mtd.2019.1.01","url":null,"abstract":"","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122967084","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}
G. Ojoc, L. Oancea, C. Pîrvu, S. Sandu, L. Deleanu, Dunărea de Jos, Incas Bucharest, Bucharest Ecology
{"title":"MODELING OF IMPACT ON MULTIPLE LAYERS WITH UNIDIRECTIONAL YARNS","authors":"G. Ojoc, L. Oancea, C. Pîrvu, S. Sandu, L. Deleanu, Dunărea de Jos, Incas Bucharest, Bucharest Ecology","doi":"10.35219/mtd.2018.4.01","DOIUrl":"https://doi.org/10.35219/mtd.2018.4.01","url":null,"abstract":"","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115930331","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}
This paper presents the influence of deformation rate on the stress- strain curves for two polymers, Polyamide 6 (PA6) and polypropylene (PP), tensile samples being supplied by Monofil SRL Săvinești, Romania. Tensile tests were done at INCAS Bucharest and the presented results are values obtained on 5 bone samples. There were analyzed the following characteristics: Young modulus, stress peak at break, elongation at break and energy at break. Greater deformation rates, when testing at traction, rises the tensile stress limit and diminishes the strain at which the polymer samples break. PA6 and PP exhibit different behaviors. PA6 yields at very low deformation rate, having a high strain at break (0.9) when it is tested at 10 mm/min, but reducing this characteristic for higher deformation rates. PP has similar curves for the tested deformation rates, but with lower tensile stress limit when tested under lower deformation rate. These data are useful when designing polymeric components bearing different strain rates.
{"title":"TENSILE TESTS FOR POLYAMIDE 6 AND POLYPROPILENE","authors":"A. Musteată, G. Pelin, Mihail Botan, L. Deleanu","doi":"10.35219/mtd.2018.4.02","DOIUrl":"https://doi.org/10.35219/mtd.2018.4.02","url":null,"abstract":"This paper presents the influence of deformation rate on the stress- strain curves for two polymers, Polyamide 6 (PA6) and polypropylene (PP), tensile samples being supplied by Monofil SRL Săvinești, Romania. Tensile tests were done at INCAS Bucharest and the presented results are values obtained on 5 bone samples. There were analyzed the following characteristics: Young modulus, stress peak at break, elongation at break and energy at break. Greater deformation rates, when testing at traction, rises the tensile stress limit and diminishes the strain at which the polymer samples break. PA6 and PP exhibit different behaviors. PA6 yields at very low deformation rate, having a high strain at break (0.9) when it is tested at 10 mm/min, but reducing this characteristic for higher deformation rates. PP has similar curves for the tested deformation rates, but with lower tensile stress limit when tested under lower deformation rate. These data are useful when designing polymeric components bearing different strain rates.","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116738457","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":"ASSESSMENT OF THE ENERGY POTENTIAL OF THE WAVES IN THE BLACK SEA","authors":"C. Gasparotti, E. Rusu, Dunărea de Jos","doi":"10.35219/mtd.2018.3.01","DOIUrl":"https://doi.org/10.35219/mtd.2018.3.01","url":null,"abstract":"","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120988404","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":"FATIGUE ANALYSIS OF A SHIP DECK","authors":"R. Ivaşcu, Dunărea de Jos","doi":"10.35219/mtd.2018.3.02","DOIUrl":"https://doi.org/10.35219/mtd.2018.3.02","url":null,"abstract":"","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128941963","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 analysis shows that the profiles play an important role in the displacement values due to static stresses. The results obtained in the industrial parter floor show the structure's ability to withstand standard wind and snow loads, but also after a possible earthquake. After the static analysis, values close to the norm-accepted limit were recorded. The advantage of metallic constructions in the field of industrial halls is obvious: weight reduction compared to reinforced concrete constructions; increased safety due to the homogeneity of steels; reduced execution time, etc. In combined cases for determining the ultimate fundamental load the maximum combined bending stresses and axial stresses do not exceed the 150 MPa admissible stress; the largest combined stresses are recorded in the bundles and not the length of the bars, with regard to the welding connection of the bar elements (roof and upper longitudinal bracings). The maximum total displacements of the rolling bridge are in accordance with the applicable regulations (arrow / bar length <1/600). Relative displacements greater than 1/600 are recorded in bars without technological importance. The track of the bridge is relatively less influenced by the action of the external loads of the hall, it is supported by its own pillars. It is absolutely
{"title":"STRENGTH CALCULATION OF AN INDUSTRIAL HALL WITH A GANTRY CRANE","authors":"C. Micu, Dunărea de Jos","doi":"10.35219/mtd.2018.3.03","DOIUrl":"https://doi.org/10.35219/mtd.2018.3.03","url":null,"abstract":"The analysis shows that the profiles play an important role in the displacement values due to static stresses. The results obtained in the industrial parter floor show the structure's ability to withstand standard wind and snow loads, but also after a possible earthquake. After the static analysis, values close to the norm-accepted limit were recorded. The advantage of metallic constructions in the field of industrial halls is obvious: weight reduction compared to reinforced concrete constructions; increased safety due to the homogeneity of steels; reduced execution time, etc. In combined cases for determining the ultimate fundamental load the maximum combined bending stresses and axial stresses do not exceed the 150 MPa admissible stress; the largest combined stresses are recorded in the bundles and not the length of the bars, with regard to the welding connection of the bar elements (roof and upper longitudinal bracings). The maximum total displacements of the rolling bridge are in accordance with the applicable regulations (arrow / bar length <1/600). Relative displacements greater than 1/600 are recorded in bars without technological importance. The track of the bridge is relatively less influenced by the action of the external loads of the hall, it is supported by its own pillars. It is absolutely","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117223907","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}
M. Woźniak, Cristina Florena Banica, M. Diaconu, G. Ozuna, P. Jóźwiak, K. Siczek
The engine valvetrain system operating under conditions of insufficient oil lubrication, caused by incorrect installation of the gasket between the block and the head, was tested. The aim of the analysis was to determine the wear intensity and resistance to motion in camshaft bearings. A model was developed that includes a camshaft, bearings, tappet-valve-spring subassemblies and a part of the lubrication system. It was used to determine the bearing loads and the amount of oil supplied. The volumetric wear of the camshaft journals and bearing covers was measured. For the estimated engine run, the wear rate and resistance to motion were compared for the cases of the engine with correct and incorrect lubrication.
{"title":"INVESTIGATIONS ON WEAR AND FRICTION IN THE SI ENGINE VALVETRAIN","authors":"M. Woźniak, Cristina Florena Banica, M. Diaconu, G. Ozuna, P. Jóźwiak, K. Siczek","doi":"10.35219/MTD.2020.4.02","DOIUrl":"https://doi.org/10.35219/MTD.2020.4.02","url":null,"abstract":"The engine valvetrain system operating under conditions of insufficient oil lubrication, caused by incorrect installation of the gasket between the block and the head, was tested. The aim of the analysis was to determine the wear intensity and resistance to motion in camshaft bearings. A model was developed that includes a camshaft, bearings, tappet-valve-spring subassemblies and a part of the lubrication system. It was used to determine the bearing loads and the amount of oil supplied. The volumetric wear of the camshaft journals and bearing covers was measured. For the estimated engine run, the wear rate and resistance to motion were compared for the cases of the engine with correct and incorrect lubrication.","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122035782","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}
F. Onea, Victoria Caranfil, L. Rusu, Dunărea de Jos
{"title":"RENEWABLES AND THE ROMANIAN ENERGY SYSTEM","authors":"F. Onea, Victoria Caranfil, L. Rusu, Dunărea de Jos","doi":"10.35219/mtd.2018.2.01","DOIUrl":"https://doi.org/10.35219/mtd.2018.2.01","url":null,"abstract":"","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129015276","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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