Engineering Solid Mechanics最新文献_第7页

Response surface methodology approach for optimized compressive strength of some mix design concrete aggregates from waste cockle shells and glass powder 用响应面法优化废螺壳和玻璃粉混合料设计混凝土的抗压强度

Engineering Solid Mechanics Pub Date : 2022-01-01 DOI: 10.5267/j.esm.2022.2.005

S. Sugito, S. W. Alisjahbana, H. Riyanto

{"title":"Response surface methodology approach for optimized compressive strength of some mix design concrete aggregates from waste cockle shells and glass powder","authors":"S. Sugito, S. W. Alisjahbana, H. Riyanto","doi":"10.5267/j.esm.2022.2.005","DOIUrl":"https://doi.org/10.5267/j.esm.2022.2.005","url":null,"abstract":"Nowadays, with increased demand for aggregates for concrete and an awareness of the need of protecting natural resources, experts are becoming increasingly interested in waste material as a building material substitute. However, the compressive strength is influenced by the composition of concrete. In this study, the compressive strength of concrete under substitution using waste from cockle shells and glass was investigated using Response Surface Methodology (RSM). Central Composite Design (CCD) based on RSM was used to assess the influence of epoxy resin, cockle shells powder, and glass powder on compressive strength responses. RSM developed first-order and second-order mathematical models with findings from experimental design. Analysis of variance was used to determine the correctness of CCD's mathematical models. Desirability analysis was then employed to optimize epoxy resin, cockle shells powder, and glass powder yielding maximum compressive strength. The RSM analysis revealed that the empirical results fit well into linear and quadratic models of concrete compressive strength. The mixing components will produce cement with compressive strength in each formulation of 54.71 MPa (4.88% epoxy resin and 4.0% cockle shells powder), 47.82 MPa (6.85% epoxy resin and 8.0% glass powder), 147.0 MPa, (4% cockle shells powder and 8% glass powder), and 56.08 MPa (4.4% epoxy resin, 4.0% cockle shells powder, and 8.0% glass powder). The results confirmed that a reasonable compressive strength of concrete could be achieved using epoxy resin, cockle shells powder, and glass powder.","PeriodicalId":37952,"journal":{"name":"Engineering Solid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70760845","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

Footprint of construction errors on the structural damages 足迹施工误差对结构的损害

Engineering Solid Mechanics Pub Date : 2022-01-01 DOI: 10.5267/j.esm.2022.4.003

S. Nemati, B. Samali, Y. Aliabadizadeh, P. J. Haghighatpour

{"title":"Footprint of construction errors on the structural damages","authors":"S. Nemati, B. Samali, Y. Aliabadizadeh, P. J. Haghighatpour","doi":"10.5267/j.esm.2022.4.003","DOIUrl":"https://doi.org/10.5267/j.esm.2022.4.003","url":null,"abstract":"The majority of structural failures are attributable to errors in construction. This problem exists in all countries, but it is more frequent in developing communities. This study focuses on construction errors of structures in Tehran, the capital city of Iran. In this study, eighty-eight buildings have been investigated during the construction phase. These buildings have been categorized into ten types and have been distributed in twenty-two suburbs. Results showed that the buildings of Tehran can suffer from at least forty-nine major construction problems. In addition, for the first time, this research has introduced the following three terms in relation to prioritizing of construction errors: Relative Importance Factor (RIF), Priority Index (PI) and Structural Importance Index (SII). As a part of the conclusions, the results showed one hundred percent of investigated buildings are affected dramatically by the “use of untrained workers” and “lack of sampling or wrong sampling” too. In this regard, the RIF and PI of each “Lack of sampling or wrong sampling” and “use of untrained workers” are 100 and 1, respectively. Also, suburb 3 has the best construction conditions while suburb 10 has the worst.","PeriodicalId":37952,"journal":{"name":"Engineering Solid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70761014","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: 0

Photovoltaic technology employment in Peru. A literature review 秘鲁的光伏技术就业。文献综述

Engineering Solid Mechanics Pub Date : 2022-01-01 DOI: 10.5267/j.esm.2022.5.001

Johan Enrique Murga Delgadillo, Gustavo Miguel Porras Monterrey, J. C. Aguilar, Rafael De la Cruz Casaño

引用次数: 0

An investigation on dynamic behavior of rotating shafts using a pipe elbow finite element formulation 用管弯头有限元公式研究转轴的动力特性

Engineering Solid Mechanics Pub Date : 2022-01-01 DOI: 10.5267/j.esm.2022.1.001

M. Sajjadpour, S. H. Kordkheili

引用次数: 0

Evaluation of the effects of soda-lime-silica glass with rice husk ash as an additive on the hardness behavior 以稻壳灰为添加剂的钠-石灰-硅玻璃对其硬度性能影响的评价

Engineering Solid Mechanics Pub Date : 2022-01-01 DOI: 10.5267/j.esm.2022.2.004

M. S. Alazemi, M. Ariffin, M. N. Abdullah, E. Supeni, F. Aziz

{"title":"Evaluation of the effects of soda-lime-silica glass with rice husk ash as an additive on the hardness behavior","authors":"M. S. Alazemi, M. Ariffin, M. N. Abdullah, E. Supeni, F. Aziz","doi":"10.5267/j.esm.2022.2.004","DOIUrl":"https://doi.org/10.5267/j.esm.2022.2.004","url":null,"abstract":"Demand for eco-friendly materials increases each year due to their excellent properties, which has proved to contribute to developing a sustainable environment. One of the promising raw materials in producing Glass is rice husk, a waste product from paddy harvesting, containing about 90% of silica. Rice husks are usually burnt in an open area and contribute to severe air pollution problems. In this research, Soda-Lime-Silica Rice Husk Ash (SLRHA) glass which is a new combination of soda-lime silicate (SLS) glass and rice husk ash (RHA), was developed for building glass and window application. The hardness properties of the developed SLS-RHA glass system are presented in this paper. These glasses were investigated to determine the effect of RHA addition on the physical properties of SLS glass. The experimental works using RSM have successfully identified the significant factors and optimized the responses. Based on the Rockwell hardness test, the outcomes demonstrated that the glass sample contained 29.84% weight SLS and 0.06% weight RHA. The result indicated that crack propagation was increased with the increasing addition of RHA, which causes an increase in cracks and voids due to the creation of more debonding.","PeriodicalId":37952,"journal":{"name":"Engineering Solid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70760824","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: 0

Enhancement the conductivity and flexibility of fabricated chip comprise from nano graphene metals assembled on polymeric PEI- PDMS matrix 在聚合物PEI- PDMS基体上组装纳米石墨烯金属，提高芯片的导电性和柔韧性

Engineering Solid Mechanics Pub Date : 2022-01-01 DOI: 10.5267/j.esm.2022.4.005

Ameen Abdelrahman, F. Erchiqui, Nedil Mourad

引用次数: 1

Design and dynamics calculations of shallot seed feeding mechanism 大葱投种机构的设计与动力学计算

Engineering Solid Mechanics Pub Date : 2022-01-01 DOI: 10.5267/j.esm.2021.10.001

C. H. Phi, Le Trung Hau, Cao Dang Long

引用次数: 0

Prediction of flow stress characteristics of P92 steel using a simple physically-based constitutive modelling 基于简单物理本构模型的P92钢流变应力特性预测

Engineering Solid Mechanics Pub Date : 2022-01-01 DOI: 10.5267/j.esm.2022.4.007

J. Obiko, L. Chown, D. Whitefield

{"title":"Prediction of flow stress characteristics of P92 steel using a simple physically-based constitutive modelling","authors":"J. Obiko, L. Chown, D. Whitefield","doi":"10.5267/j.esm.2022.4.007","DOIUrl":"https://doi.org/10.5267/j.esm.2022.4.007","url":null,"abstract":"This study reports the flow stress behavior of three P92 steels with different compositions. Uniaxial compression tests were conducted in the deformation temperature range of 575 °C to 650 °C and strain rate range of 0.001-0.5 s-1 using a Gleeble® 3500 thermo-mechanical simulator. A simple physically-based constitutive model was used to analyse the effects of deformation conditions (temperature and strain rate) on the metal flow stress behavior during the deformation process. The method accounts for the temperature dependence of Young’s modulus and the lattice self-diffusion coefficient of Fe in the ferrite. Constitutive equations describing the flow stress behavior of the three P92 steels were developed. From the results, the stress exponent n of 26.13(steel A), 21.61(steel B) and 27.55 (steel C) were obtained using the self-diffusion activation energy in the physically-based constitutive equation. From the results, the three steels had variation in the stress exponent values, which was attributed to differences in elemental content, such as chromium and tungsten. The developed constitutive equations were verified using statistical parameters: Pearson’s correlation coefficient (R) and average absolute relative errors (AARE). Statistical analysis showed that the three steels had the same R of 0.98, while AARE was: 1.68 (steel A), 1.72 (steel B), and 1.82 (steel C). The constitutive equations developed showed a good correlation between the experimental and predicted flow stress data. Hence, the method is applicable in describing flow stress behavior in the metalworking process in the industry.","PeriodicalId":37952,"journal":{"name":"Engineering Solid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70761254","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: 0

Optimization of wire type and current welding on the strength of welding connection in two types of material testing via response surface methodology 优化焊丝类型和焊接电流对两种材料焊接连接强度的影响，采用响应面法进行测试

Engineering Solid Mechanics Pub Date : 2022-01-01 DOI: 10.5267/j.esm.2022.6.004

H. Riyanto, S. Sugito, Abdul Fikri

{"title":"Optimization of wire type and current welding on the strength of welding connection in two types of material testing via response surface methodology","authors":"H. Riyanto, S. Sugito, Abdul Fikri","doi":"10.5267/j.esm.2022.6.004","DOIUrl":"https://doi.org/10.5267/j.esm.2022.6.004","url":null,"abstract":"The number of types of wire welding that circulate on the market and the development of welding technology, especially related to current welding, create a lack of information related to the quality of welding results for several types of materials. This can cause the strength of the welding connection to not be maximized. Therefore, this study aims to optimize the use of three types of wire welding and three current welding on the strength of the welding connection in two types of material testing using the response surface methodology. Box-Behnken, coupled with the RSM and the desirability function, was used to optimize the strength of the welding connection of the wire types (RD-46, LB-52, and RB-26), and current welding (100, 130, and 160 A) against two types of material testing (IWF-150 and ASTM-A517-G70). The strength of the welding connection observed in response included the tensile strength, Charpy impact-absorbed energy, hardness values in the welding metal and the hardness values in the main metal. Optimization of the strength of the welding connection in this study recommends the application of wire types RB-26, current welding of 100 A, and ASTM-A517-G70 material testing with the highest desirability value of 71.6%. Optimization of tensile strength, Charpy impact-absorbed energy, hardness values in welding metal, and hardness values in main metal by applying this parameter are 575.64 MPa, 110.69 J, 216.75 (HV10) and 126.6 (HV10), respectively. The results proved that an appropriate welding connection strength could be achieved using wire welding types and current welding in material testing.","PeriodicalId":37952,"journal":{"name":"Engineering Solid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70761292","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: 0

Simplified equations for determining double-k fracture parameters of concrete for compact tension test 确定混凝土紧拉试验双k断裂参数的简化方程

Engineering Solid Mechanics Pub Date : 2022-01-01 DOI: 10.5267/j.esm.2021.10.002

R. K. Choubey, Shailendra Kumar

引用次数: 8