FRACTURE AND DAMAGE MECHANICS: Theory, Simulation and Experiment最新文献

Physico-chemical characterization of polyethylene glycol-conjugated betulinic acid 聚乙二醇偶联白桦酸的理化性质

FRACTURE AND DAMAGE MECHANICS: Theory, Simulation and Experiment Pub Date : 2020-11-30 DOI: 10.1063/5.0028479

Sindisiwe Mvango, N. Mthimkhulu, P. Fru, L. Pilcher, M. Balogun

引用次数: 3

Preface: Proceedings of PPS2019, Europe-Africa Regional Conference of the Polymer Processing Society 前言:PPS2019会议录，聚合物加工学会欧洲-非洲区域会议

FRACTURE AND DAMAGE MECHANICS: Theory, Simulation and Experiment Pub Date : 2020-11-30 DOI: 10.1063/12.0001280

Ranjan Sinha

引用次数: 0

Computational and experimental analysis of timber beams with different types of flaws 不同缺陷类型的木梁计算与试验分析

FRACTURE AND DAMAGE MECHANICS: Theory, Simulation and Experiment Pub Date : 2020-11-30 DOI: 10.1063/5.0034413

J. Kovacikova, O. Ivánková, S. Berg, M. Ekevad, T. Klas

{"title":"Computational and experimental analysis of timber beams with different types of flaws","authors":"J. Kovacikova, O. Ivánková, S. Berg, M. Ekevad, T. Klas","doi":"10.1063/5.0034413","DOIUrl":"https://doi.org/10.1063/5.0034413","url":null,"abstract":"This work was focused on the experimental testing and finite element analysis (FEA) of timber beams with and without flaws (different types of cracks and hole). The aim was analysing the effect of flaws on their load-carrying capacity. This topic is important for designers of timber constructions, since even today there is still a lack of knowledge in the field of fracture mechanics of wood. The results from experimental testing and numerical simulations were discussed in this paper. Two wood products were analysed, namely, sawn and glued laminated beams (glulam beams) and three types of flaws were considered for both products i.e. a vertical crack, an oblique crack and a circular hole. In addition for glulam beams the horizontal crack in the glue line was considered. Four-point bending test was created for experimental testing considering quasi-brittle characteristic of wood. 4 samples for each type of beam, 36 in total. XFEM (Extended Finite Element Method) was used for finite element analysis of beams with considering orthotropic-elastic properties for glulam beams were considered and The results of mechanical tests and FEA gave us an overview on how different types of flaws influence the load-carrying capacity of sawn and glulam beams and with what accuracy we can simulate cracks in wood using computational method.","PeriodicalId":300477,"journal":{"name":"FRACTURE AND DAMAGE MECHANICS: Theory, Simulation and Experiment","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134165244","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

Chemical modification of sugarcane bagasse with chitosan for the removal of phosphates in aqueous solution 壳聚糖对甘蔗渣进行化学改性去除水溶液中的磷酸盐

FRACTURE AND DAMAGE MECHANICS: Theory, Simulation and Experiment Pub Date : 2020-11-01 DOI: 10.1063/5.0028378

Alusani Manyatshe, M. Balogun, T. Nkambule, Z. Cele, T. Msagati

{"title":"Chemical modification of sugarcane bagasse with chitosan for the removal of phosphates in aqueous solution","authors":"Alusani Manyatshe, M. Balogun, T. Nkambule, Z. Cele, T. Msagati","doi":"10.1063/5.0028378","DOIUrl":"https://doi.org/10.1063/5.0028378","url":null,"abstract":". Sugarcane bagasse is the major solid waste product of the sugarcane industry. As a plant-derived biomass, it is an attractive environmentally friendly alternative to petroleum-based materials. Being a non-food agriculture product, its use as a raw material is more widely accepted. Sugarcane bagasse is comprised mainly of cellulose, hemicellulose and lignin. The aim of this study was to develop a low-cost anion exchange adsorbent from sugarcane bagasse for the removal of phosphates in aqueous solution. The adsorbent was developed by crosslinking chitosan with cellulose that was extracted from sugarcane bagasse. To obtain cellulose for covalent linkage with chitosan, the bagasse was pretreated with dilute sodium hydroxide and sulphuric acid solutions followed by bleaching with hydrogen peroxide. After this process, the material was modified using chitosan functionalized with epichlorohydrin to obtain the modified bagasse (SCB-CS). SCB-CS was characterized using Fourier transform infrared spectroscopy (FTIR) analysis that indicated the successful reduction in the content of lignin and hemicellulose. The grafting of chitosan derivatives within the matrix of cellulose was confirmed by intense peaks at 1651 cm -1 and 1589 cm -1 observed on the modified SCB-CS. SCB-CS was evaluated for its ability to remove phosphates from synthetic waste water and 61.51% removal and an adsorption capacity of 52.33 mg/g, where the initial concentration was 28.36 mg/L at an adsorbent dosage of 0.1 g was achieved.","PeriodicalId":300477,"journal":{"name":"FRACTURE AND DAMAGE MECHANICS: Theory, Simulation and Experiment","volume":"55 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114094951","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

Understanding the influence of manufacturing and material parameters on the mechanical properties of polymer-clay composites: An exploratory statistical analysis 了解制造和材料参数对聚合物-粘土复合材料力学性能的影响:探索性统计分析

FRACTURE AND DAMAGE MECHANICS: Theory, Simulation and Experiment Pub Date : 2019-11-12 DOI: 10.26434/chemrxiv.10247522.v1

N. Botha, R. Coetzer, H. Inglis, J. Labuschagné

{"title":"Understanding the influence of manufacturing and material parameters on the mechanical properties of polymer-clay composites: An exploratory statistical analysis","authors":"N. Botha, R. Coetzer, H. Inglis, J. Labuschagné","doi":"10.26434/chemrxiv.10247522.v1","DOIUrl":"https://doi.org/10.26434/chemrxiv.10247522.v1","url":null,"abstract":"This paper analyses a set of previously obtained experimental results on various clay fillers added to high density polyethylene (HDPE). The composite material was compounded using an extrusion process and manufactured into tensile test samples by means of hot pressing. Various manufacturing parameters (number of extrusions, press time, sample cooling method), material (polymer grade, clay type, clay weight loading) and testing parameters (strain rate) were investigated to determine their influence on the mechanical properties of the composite system. Exploratory data analysis was first employed by graphically representing the data using scatter plots to identify any main characteristics, patterns or anomalies. The statistical analysis was used to quantify the effects of the ultimate tensile strength by first conducting a one way ANOVA analysis before developing a linear model for the response variable analysis. For the percentage elongation to failure, the observations was first grouped into three groups, Brittle, Intermediate or Ductile. A linear discriminant analysis was performed to classify the groups considering a training set of 80% randomly selected observations and testing on the remaining 20%.","PeriodicalId":300477,"journal":{"name":"FRACTURE AND DAMAGE MECHANICS: Theory, Simulation and Experiment","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130026923","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

The influence of processing on the mechanical properties and emissions of a recycled polyolefin 加工对再生聚烯烃机械性能和排放的影响

FRACTURE AND DAMAGE MECHANICS: Theory, Simulation and Experiment Pub Date : 1900-01-01 DOI: 10.1063/5.0028345

Thomas Höftberger, C. Burgstaller

引用次数: 0

European Society of Computational Methods in Sciences and Engineering (ESCMSE) 欧洲科学与工程计算方法学会(ESCMSE)

FRACTURE AND DAMAGE MECHANICS: Theory, Simulation and Experiment Pub Date : 1900-01-01 DOI: 10.1063/12.0001450

引用次数: 4