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Adhesion Theories and Effect of Surface Roughness on Energy Estimation and Wettability of Polymeric Composites Bonded Joints: A-Review 粘接理论及表面粗糙度对高分子复合材料粘接接头能量估算和润湿性的影响

VW Applied Sciences Pub Date : 2019-08-31 DOI: 10.36297/vw.applsci.v2i1.37

Muhammad Dawood Bukhari, G. A. Gohar, Awais Akhtar, S. Ullah, Muhammad Akram, Jawad Abid, H. Raza

{"title":"Adhesion Theories and Effect of Surface Roughness on Energy Estimation and Wettability of Polymeric Composites Bonded Joints: A-Review","authors":"Muhammad Dawood Bukhari, G. A. Gohar, Awais Akhtar, S. Ullah, Muhammad Akram, Jawad Abid, H. Raza","doi":"10.36297/vw.applsci.v2i1.37","DOIUrl":"https://doi.org/10.36297/vw.applsci.v2i1.37","url":null,"abstract":"Adhesive bonding is getting more attention for research and considered as most promising and well-known technique for joining the two materials which may be similar or dissimilar naturally polymers, metals etc. and to be utilized in light weight structures for reduced stress distribution. Adhesion bonding consisting on intrinsic bonding force which plays vital role to make the joint withstand more strength. To fabricate an effective griped joint between the components, good adhesion strength is compulsory attainment factor for long life of structures. Recently, along with metallic materials polymers and their composites are also trending in multiple industries. All materials always have forces of attraction between their atoms/molecules which extremely crucial role to ensure stronger bond strength and often dependent on roughness of surface of material which are taking part to fabricate the joint. Consequently, surface roughness and surface morphology are most important parameters to decide the joint strength and life of bonded joints of polymeric composites. In this review article, mechanical interlocking mechanism, surface roughness effects on wettability, surface energy estimation and various bonding theories including adsorption theory, diffusion theory, boundary layer theory and chemical theory are discussed briefly to emphasize the various technological & industrial developments.","PeriodicalId":382935,"journal":{"name":"VW Applied Sciences","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125103544","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}

引用次数: 11

Effect of Surface Roughness on Shear Strength of Bonded Joints of Aluminum AL 6061 T6 substrate 表面粗糙度对AL 6061 T6基板粘结接头抗剪强度的影响

VW Applied Sciences Pub Date : 2019-08-31 DOI: 10.36297/vw.applsci.v2i2.38

Jawad Abid, H. Raza, Awais Akhtar, G. A. Gohar, S. Ullah, Muhammad Akram, Y. Raza, Muhammad Dawood Bukhari

{"title":"Effect of Surface Roughness on Shear Strength of Bonded Joints of Aluminum AL 6061 T6 substrate","authors":"Jawad Abid, H. Raza, Awais Akhtar, G. A. Gohar, S. Ullah, Muhammad Akram, Y. Raza, Muhammad Dawood Bukhari","doi":"10.36297/vw.applsci.v2i2.38","DOIUrl":"https://doi.org/10.36297/vw.applsci.v2i2.38","url":null,"abstract":"In this study, effect of surface roughness on adhesive bonding of aluminum (AL 6061 T6) substrates is investigated to determine the required bond strength between the adhesive and adherends interface. Quality of AL 6061 T6 lap shear joints (adherend surface preparation) is achieved by mechanical abrasion using diverse grades of silicon carbide sheets (P 320C, P 220C and P 180C). Lab grade acetone is utilized for the removal of impurities from the substrate surface while Loctite 4090 is served as adhesive to bond lap shear joints. Surface roughness of the substrates is measured by using profilometer (SURFTEST SJ-210). Experimental testing of adhesively bonded specimens with diverse surface roughness is conducted on Universal Testing Machine (UTM) to measure the shear strength. The results show that, aluminum adherends pretreated with P220 C achieve maximum adhesion bond strength up to 34.45 MPa at surface roughness of Ra=1.55 µm, but further increase in surface roughness from Ra=1.55 µm to Ra=2.4 µm causes 13.7% decrease in shear bond strength. Furthermore, the specimens without pretreatment achieve minimum shear bond strength up to15.23 MPa at surface roughness of Ra=0.03 µm. It was concluded that with the increase in surface roughness of the adherends up to certain limit, bond strength also increases, and locus of failure shifted from adhesive - adherend interface to within the adhesive.","PeriodicalId":382935,"journal":{"name":"VW Applied Sciences","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126703683","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}

引用次数: 3

Effect of Un-reinforced Masonry Infills on Seismic Performance of Hill Buildings 未配筋砌体填充物对丘陵建筑抗震性能的影响

VW Applied Sciences Pub Date : 2019-08-31 DOI: 10.36297/vw.applsci.v1i1.29

Zaid Mohammad

{"title":"Effect of Un-reinforced Masonry Infills on Seismic Performance of Hill Buildings","authors":"Zaid Mohammad","doi":"10.36297/vw.applsci.v1i1.29","DOIUrl":"https://doi.org/10.36297/vw.applsci.v1i1.29","url":null,"abstract":"The present study investigates the influence of un-reinforced masonry infill panels on the seismic performance of stepback and stepback-setback hill building configurations. Masonry infills are often used for partition in RC frame construction and its significance as a structural element in the analysis and design is generally neglected. Thus, to observe the structural effect on the seismic response of hill buildings, masonry infill panels are modelled as diagonal struts and analysed as truss elements. In all, sixteen models with and without masonry infills are modelled and analyzed by using response spectrum method and dynamic properties are presented and compared within considered configurations. It is observed that masonry infills not only reduce overall storey drift and base shear at different foundation levels but also increase the shear demand in the surrounding frame due to high lateral stiffness when subjected seismic loads. It is concluded that the masonry infill panels entirely change the seismic response of a building and thus, it is important to incorporate these elements in the analysis and design of the building structure, in order to understand the true structural response.","PeriodicalId":382935,"journal":{"name":"VW Applied Sciences","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122391527","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}

引用次数: 5