{"title":"The Impact of Fiber Reinforcement on Fresh and Physical Properties with Durability of Recycled Coarse Aggregate Concrete: A Review","authors":"Pawan Kumar Tiwari, Vinay Kumar Singh","doi":"10.25103/jestr.164.11","DOIUrl":"https://doi.org/10.25103/jestr.164.11","url":null,"abstract":"","PeriodicalId":15707,"journal":{"name":"Journal of Engineering Science and Technology Review","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135798973","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}
Jinping Yu, Guodong Ji, Qiang Wu, Qing Wang, Huaigang Hu
Rock breaking efficiency of drill bits is an important index for measuring the drilling efficiency in the oil and gas drilling field, and it is influenced by many factors, such as structure and material. This study developed a calculation model and an experimental model of rock breaking of polycrystalline diamond compact (PDC) and diamond impregnated cutter (DIC) hybrid bit to reveal the influence of bit structure and material on tangential force, axial force and wear height. On the basis of the calculation model of the co-rail arrangement of the PDC – DIC hybrid bit and the rock breaking mode, a rock breaking mechanical parameter prediction model and a rock breaking performance test model were established. Rock stress calculation method, rock failure criterion, and mechanical specific energy (MSE) calculation method were used to analyze the rock stress and the relationship between MSE and tangential force, axial force, and wear height during combined rock breaking. The accuracy of the model was verified by experiments. Results show that the specific work of rock breaking of the PDC-DIC hybrid bit is less than that of PDC, and a reverse nonlinear relationship exists between specific work of rock breaking and wear height. The energy required for hybrid bit to break rock is less than that of PDC bit. A positive nonlinear relationship exists between the energy of PDC-DIC hybrid bit and the wear height, whereas the cutting depth and the wear height show a negative nonlinear relationship. The stress distribution of PDC rock breaking is uniform, and the maximum equivalent stress is up to 104 MPa. The stress distribution of rock breaking of the hybrid PDC-DIC is extremely nonuniform, and stress concentration occurs with a minimum equivalent stress of 84 MPa and a maximum stress of 161 MPa, which is beneficial to rock breaking. Rock breaking of PDC-DIC hybrid bit can promote the generation and development of rock cracks, thereby reducing the crushing strength of the rock. The study provides a design method and theoretical basis for designing a new type of PDC-DIC hybrid bit, with certain reference for exploring the rock breaking mechanism of various bits
{"title":"Mechanism of Polycrystalline Diamond Compact and Diamond Impregnated Cutter Hybrid Bit Composite Rock Breaking","authors":"Jinping Yu, Guodong Ji, Qiang Wu, Qing Wang, Huaigang Hu","doi":"10.25103/jestr.162.23","DOIUrl":"https://doi.org/10.25103/jestr.162.23","url":null,"abstract":"Rock breaking efficiency of drill bits is an important index for measuring the drilling efficiency in the oil and gas drilling field, and it is influenced by many factors, such as structure and material. This study developed a calculation model and an experimental model of rock breaking of polycrystalline diamond compact (PDC) and diamond impregnated cutter (DIC) hybrid bit to reveal the influence of bit structure and material on tangential force, axial force and wear height. On the basis of the calculation model of the co-rail arrangement of the PDC – DIC hybrid bit and the rock breaking mode, a rock breaking mechanical parameter prediction model and a rock breaking performance test model were established. Rock stress calculation method, rock failure criterion, and mechanical specific energy (MSE) calculation method were used to analyze the rock stress and the relationship between MSE and tangential force, axial force, and wear height during combined rock breaking. The accuracy of the model was verified by experiments. Results show that the specific work of rock breaking of the PDC-DIC hybrid bit is less than that of PDC, and a reverse nonlinear relationship exists between specific work of rock breaking and wear height. The energy required for hybrid bit to break rock is less than that of PDC bit. A positive nonlinear relationship exists between the energy of PDC-DIC hybrid bit and the wear height, whereas the cutting depth and the wear height show a negative nonlinear relationship. The stress distribution of PDC rock breaking is uniform, and the maximum equivalent stress is up to 104 MPa. The stress distribution of rock breaking of the hybrid PDC-DIC is extremely nonuniform, and stress concentration occurs with a minimum equivalent stress of 84 MPa and a maximum stress of 161 MPa, which is beneficial to rock breaking. Rock breaking of PDC-DIC hybrid bit can promote the generation and development of rock cracks, thereby reducing the crushing strength of the rock. The study provides a design method and theoretical basis for designing a new type of PDC-DIC hybrid bit, with certain reference for exploring the rock breaking mechanism of various bits","PeriodicalId":15707,"journal":{"name":"Journal of Engineering Science and Technology Review","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82353662","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":"Performance Analysis of a Two-Stage Converter for Solar PV Systems","authors":"Y. R. Tagore, K. Rajani, Alla Ramakoteswara Rao","doi":"10.25103/jestr.163.07","DOIUrl":"https://doi.org/10.25103/jestr.163.07","url":null,"abstract":"","PeriodicalId":15707,"journal":{"name":"Journal of Engineering Science and Technology Review","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":"89964050","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 control of access to data is perhaps the primary factor in enhancing secure data within this cloud-based storage system. But, traditional data sharing, along with access control techniques, have been a significant problem in the field of research that includes leakage of privacy information and key misuse. Transferring Electronic Records (ER) on the cloud has allowed data sharing among various health applications. Therefore, two major contributions are created in this study to provide effective access control and private data sharing as well as retrieval within the cloud based on blockchain. In the initial contribution is blockchain-based access control and sharing method effectively resolves the single point of failure within the cloud infrastructure. The Data User (DU) generates an application for registration based on the ID and password and is then forwarded to the Data Owner (DO). The DO data is incorporated into a transactional Blockchain based by encrypted master keys. The DO secures data while the encrypted file is uploaded into the Interplanetary File System (IPFS). In the second piece of work blockchain structure was created to facilitate information sharing as well as retrieval within cloud platforms.
{"title":"Block Chain Based Secure with Improvised Bloom Filter over a Decentralized Access Control Network on a Cloud Platform","authors":"Ravikumar Ch, Isha Batra, Arun Malik","doi":"10.25103/jestr.162.16","DOIUrl":"https://doi.org/10.25103/jestr.162.16","url":null,"abstract":"The control of access to data is perhaps the primary factor in enhancing secure data within this cloud-based storage system. But, traditional data sharing, along with access control techniques, have been a significant problem in the field of research that includes leakage of privacy information and key misuse. Transferring Electronic Records (ER) on the cloud has allowed data sharing among various health applications. Therefore, two major contributions are created in this study to provide effective access control and private data sharing as well as retrieval within the cloud based on blockchain. In the initial contribution is blockchain-based access control and sharing method effectively resolves the single point of failure within the cloud infrastructure. The Data User (DU) generates an application for registration based on the ID and password and is then forwarded to the Data Owner (DO). The DO data is incorporated into a transactional Blockchain based by encrypted master keys. The DO secures data while the encrypted file is uploaded into the Interplanetary File System (IPFS). In the second piece of work blockchain structure was created to facilitate information sharing as well as retrieval within cloud platforms.","PeriodicalId":15707,"journal":{"name":"Journal of Engineering Science and Technology Review","volume":"160 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89029862","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}
To reveal the damage mechanism of cement-stabilized macadam, the mechanical properties of cement-stabilized aggregates immersed in water for different times were examined by uniaxial compression tests, and the evolution of damage factors of cement-stabilized aggregates specimens was investigated. On the basis of theory of Weibull distribution, the material constitutive relationship suitable for the destruction of cement-stabilized macadam materials immersed in water was proposed. Results show that the strength/elastic modulus of cement-stabilized macadam decreases with the increase in immersion time in water, indicating that water has a weakening effect on cement-stabilized macadam. Linear/nonlinear phases appear in the stress-strain curve. The influence of shape parameters on nonpore compression stage is greater than that on pore compression stage. The damage variable remains constant in the early stage. The stress-strain curve of the damage model is in good agreement with that of the test data. The conclusions obtained in this study provide a significant reference for cement-stabilized macadam engineering.
{"title":"Constitutive Model of Water Immersion Damage to Cement Stabilized Macadam under Water Weak Effect and Uniaxial Compression","authors":"B. Gong, Zhan-Mou Yan, Chunliu Li","doi":"10.25103/jestr.162.08","DOIUrl":"https://doi.org/10.25103/jestr.162.08","url":null,"abstract":"To reveal the damage mechanism of cement-stabilized macadam, the mechanical properties of cement-stabilized aggregates immersed in water for different times were examined by uniaxial compression tests, and the evolution of damage factors of cement-stabilized aggregates specimens was investigated. On the basis of theory of Weibull distribution, the material constitutive relationship suitable for the destruction of cement-stabilized macadam materials immersed in water was proposed. Results show that the strength/elastic modulus of cement-stabilized macadam decreases with the increase in immersion time in water, indicating that water has a weakening effect on cement-stabilized macadam. Linear/nonlinear phases appear in the stress-strain curve. The influence of shape parameters on nonpore compression stage is greater than that on pore compression stage. The damage variable remains constant in the early stage. The stress-strain curve of the damage model is in good agreement with that of the test data. The conclusions obtained in this study provide a significant reference for cement-stabilized macadam engineering.","PeriodicalId":15707,"journal":{"name":"Journal of Engineering Science and Technology Review","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":"78999623","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}
Hydrogen sulfide emission affects the safety of mine production during mining of a fully mechanized excavation face. To solve this problem, on the basis of site measurement analysis of the hydrogen sulfide distribution law of the fully mechanized excavation face, a new technology is proposed with a wind curtain ventilator to seal the fully excavated section and establish a hydrogen sulfide control flow field. This technology can be used to prevent the overflow of hydrogen sulfide and elucidate closed flow theory of the wind curtain ventilator. Based on fluid mechanics theory, the potential superposition principle
{"title":"A Novel Control Technology of Hydrogen Sulfide in Fully Mechanized Excavation Face","authors":"Yuan Wei, Lang Zhang, Yun Qi, Wei Wang","doi":"10.25103/jestr.165.05","DOIUrl":"https://doi.org/10.25103/jestr.165.05","url":null,"abstract":"Hydrogen sulfide emission affects the safety of mine production during mining of a fully mechanized excavation face. To solve this problem, on the basis of site measurement analysis of the hydrogen sulfide distribution law of the fully mechanized excavation face, a new technology is proposed with a wind curtain ventilator to seal the fully excavated section and establish a hydrogen sulfide control flow field. This technology can be used to prevent the overflow of hydrogen sulfide and elucidate closed flow theory of the wind curtain ventilator. Based on fluid mechanics theory, the potential superposition principle","PeriodicalId":15707,"journal":{"name":"Journal of Engineering Science and Technology Review","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135611670","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":"Higher Order Shear Deformation Theory for Functionally Graded Porous Beam - Numerical Free Vibrational Analysis","authors":"N. K. Geetha, G. Reddy, P. Bridjesh","doi":"10.25103/jestr.165.08","DOIUrl":"https://doi.org/10.25103/jestr.165.08","url":null,"abstract":"","PeriodicalId":15707,"journal":{"name":"Journal of Engineering Science and Technology Review","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135611692","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}
Zihui Zhu, Qirui Wang, Jiaqi Guo, Yongsheng He, Feiyue Sun
{"title":"Prevention and Control Analysis of Rockburst Using Drilling Pressure Relief in Surrounding Rock Mass of Deep Tunnel","authors":"Zihui Zhu, Qirui Wang, Jiaqi Guo, Yongsheng He, Feiyue Sun","doi":"10.25103/jestr.164.13","DOIUrl":"https://doi.org/10.25103/jestr.164.13","url":null,"abstract":"","PeriodicalId":15707,"journal":{"name":"Journal of Engineering Science and Technology Review","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135798644","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：