E. I. Kalu, M. Skrifvas, P. Khalili, D. Akesson, E. N. Ikezue
The Charpy impact test measures the amount of energy absorbed by a standard notched specimen while breaking under an impact load. The test consists of striking a suitable specimen with a hammer on a pendulum arm while the specimen is held securely at each end. Composites are judicious combination of two or more materials that produces aggregate properties that are different from those of its constituents. Composites are hybrid materials made of a polymer resin reinforced by fibres, combining the high mechanical and physical properties of the fibres and the appearance, bonding and physical properties of the polymers. This work studies the impact strength for given range of temperature (210°C-180°C), force (5-8KN) and time (8-15 mins) for six natural fibres reinforced with polypropylene matrix base. The bast fibres include viscose, rayon, lyocell, linen, jute and hemp. The results show for rayon a maximum impact strength of 32.3144KJ/m2 at a force of 3KN, time of 10 mins and a temperature of 200°C, for viscose a maximum impact strength of 30.7716KJ/m2 at a temperature of 180°C, time of 15 mins and force of 5KN. Lyocell had a maximum impact strength of 29.3869KJ/m2 for an elapsed time of 10 mins, impact force of 3KN and a temperature of 200°C, linen had a maximum strength of 35.8735KJ/m2 at an elapsed time of 10 mins, impact force of 3KN at a temperature of 200°C, jute had a maximum strength of 13.2075KJ/m2 at an elapsed time of 8 mins, impact force of 3KN and a temperature of 210°C, and hemp had a strength of 12.7050KJ/m2 at an elapsed time of 10 mins, impact force of 3KN and a temperature of 200°C. Received: April 29, 2023Revised: May 28, 2023Accepted: June 29, 2023
{"title":"IMPACT TEST ANALYSIS OF NATURAL FIBRE REINFORCED POLYMER COMPOSITES FABRICATED WITH BAST FIBRES FOR INDUSTRIAL/HOUSEHOLD APPLICATIONS","authors":"E. I. Kalu, M. Skrifvas, P. Khalili, D. Akesson, E. N. Ikezue","doi":"10.17654/0975044423008","DOIUrl":"https://doi.org/10.17654/0975044423008","url":null,"abstract":"The Charpy impact test measures the amount of energy absorbed by a standard notched specimen while breaking under an impact load. The test consists of striking a suitable specimen with a hammer on a pendulum arm while the specimen is held securely at each end. Composites are judicious combination of two or more materials that produces aggregate properties that are different from those of its constituents. Composites are hybrid materials made of a polymer resin reinforced by fibres, combining the high mechanical and physical properties of the fibres and the appearance, bonding and physical properties of the polymers. This work studies the impact strength for given range of temperature (210°C-180°C), force (5-8KN) and time (8-15 mins) for six natural fibres reinforced with polypropylene matrix base. The bast fibres include viscose, rayon, lyocell, linen, jute and hemp. The results show for rayon a maximum impact strength of 32.3144KJ/m2 at a force of 3KN, time of 10 mins and a temperature of 200°C, for viscose a maximum impact strength of 30.7716KJ/m2 at a temperature of 180°C, time of 15 mins and force of 5KN. Lyocell had a maximum impact strength of 29.3869KJ/m2 for an elapsed time of 10 mins, impact force of 3KN and a temperature of 200°C, linen had a maximum strength of 35.8735KJ/m2 at an elapsed time of 10 mins, impact force of 3KN at a temperature of 200°C, jute had a maximum strength of 13.2075KJ/m2 at an elapsed time of 8 mins, impact force of 3KN and a temperature of 210°C, and hemp had a strength of 12.7050KJ/m2 at an elapsed time of 10 mins, impact force of 3KN and a temperature of 200°C. Received: April 29, 2023Revised: May 28, 2023Accepted: June 29, 2023","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"44 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136068238","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}
As reliable sources of clean energy become increasingly necessary in modern society, research into photovoltaics as an alternative to conventional fossil fuels has accelerated considerably. Perovskite-based solar cells hold particular promise as a cheaper, easier-to-manufacture alternative to traditional silicon-based devices. In this review paper, perovskites are presented as a class of materials while their common processing methods are analyzed in the context of advancing photovoltaic manufacturing techniques. Their advantages over traditional silicon-based photovoltaics are discussed, and these advantages are contrasted with the current issues facing the wide-scale implementation of the materials in modern devices, particularly, in regards to their chemical stability and environmental/health concerns. Finally, several potential avenues of improvement are offered, including changes to the architecture of the devices and the addition of small-molecule dopants. Received: July 31, 2023Accepted: September 9, 2023
{"title":"ADDRESSING THE DRAWBACKS OF PEROVSKITE PHOTOVOLTAICS TO IMPROVE SOLAR ENERGY TECHNOLOGIES: A REVIEW","authors":"Andrew Setley, C. P. Wong","doi":"10.17654/0975044423007","DOIUrl":"https://doi.org/10.17654/0975044423007","url":null,"abstract":"As reliable sources of clean energy become increasingly necessary in modern society, research into photovoltaics as an alternative to conventional fossil fuels has accelerated considerably. Perovskite-based solar cells hold particular promise as a cheaper, easier-to-manufacture alternative to traditional silicon-based devices. In this review paper, perovskites are presented as a class of materials while their common processing methods are analyzed in the context of advancing photovoltaic manufacturing techniques. Their advantages over traditional silicon-based photovoltaics are discussed, and these advantages are contrasted with the current issues facing the wide-scale implementation of the materials in modern devices, particularly, in regards to their chemical stability and environmental/health concerns. Finally, several potential avenues of improvement are offered, including changes to the architecture of the devices and the addition of small-molecule dopants. Received: July 31, 2023Accepted: September 9, 2023","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"158 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136262603","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":"ELECTRONIC STRUCTURES OF MnGe","authors":"T. Jeong","doi":"10.17654/0975044423006","DOIUrl":"https://doi.org/10.17654/0975044423006","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84820451","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":"THEORETICAL AND NUMERICAL ANALYSES OF SHORT NATURAL FIBERS ORIENTATION IN THERMOPLASTIC MATRIX","authors":"I. Modhaffar","doi":"10.17654/0975044423005","DOIUrl":"https://doi.org/10.17654/0975044423005","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73091006","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":"SELECTED RESEARCH BRIEFS ON THE FABRICATION OF VALUE ADDED COMPOSITES USING RECYCLED TEXTILE WASTE AS REINFORCEMENT MATERIAL","authors":"R. Parachuru","doi":"10.17654/0975044423004","DOIUrl":"https://doi.org/10.17654/0975044423004","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88805032","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":"NEW EXPERIMENTAL ANALYTICAL APPROACH TO STUDY THE EFFECTS OF TEMPERATURE AND IRRADIANCE ON THE PHYSICAL PARAMETERS OF THE SOLAR PHOTOVOLTAIC MODULE IN SUNNY AND TEMPERATE ZONES","authors":"Cheikh Touré, P. Sow, S. Mbodji","doi":"10.17654/0975044423003","DOIUrl":"https://doi.org/10.17654/0975044423003","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78316118","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":"PURE AXIAL SHEAR OF A PSEUDO-ELASTIC LONG CIRCULAR CYLINDRICAL TUBE","authors":"Rajesh Kumar","doi":"10.17654/0975044423002","DOIUrl":"https://doi.org/10.17654/0975044423002","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91367106","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":"SELECT HIGHLIGHTS OF RECENT RESEARCH ON TURNING TEXTILE WASTE AND RECYCLED TEXTILES INTO BIODIESEL","authors":"R. Parachuru","doi":"10.17654/0975044423001","DOIUrl":"https://doi.org/10.17654/0975044423001","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79437107","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}
Md. Abdus Sattar, A. Hossain, Mahananda Roy, S. Sultana, M. Alamin, S. Sana
{"title":"URBAN SOLID WASTE MANAGEMENT IN DINAJPUR CITY: A SOURCE OF RENEWABLE ENERGY","authors":"Md. Abdus Sattar, A. Hossain, Mahananda Roy, S. Sultana, M. Alamin, S. Sana","doi":"10.17654/0975044422002","DOIUrl":"https://doi.org/10.17654/0975044422002","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"97 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86028472","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":"HAMILTONIAN SYMPLECTIC FORMALISM FOR STRUCTURAL SYSTEMS","authors":"M. Arici","doi":"10.17654/0975044422001","DOIUrl":"https://doi.org/10.17654/0975044422001","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81842546","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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