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Application and circular economy prospects of palm oil waste for eco-friendly asphalt pavement industry:A review

Journal of Road Engineering 2022年第4期2卷 309-331页

作者： Nura Shehu aliyu Yaro muslich Hartadi Sutanto Noor Zainab Habib madzlan Napiah aliyu Usman Ahmad Hussaini Jagaba abdulnaser m.al-sabaeei Department of Civil and Environmental Engineering Universiti Teknologi PETRONASBandar Seri Iskandar 32610Malaysia Department of Civil Engineering Ahmadu Bello UniversityZaria 810107Nigeria Institute of Self-Sustainable Building Universiti Teknologi PETRONASBandar Seri Iskandar 32610Malaysia School of Energy GeoscienceInfrastructureand SocietyHeriot-Watt University DubaiDubai 38103United Arab Emirates

During the production of palm oil,a significant amount of waste is ***,because of inefficient handling and utilization,these wastes are becoming a larger *** a result,one initiative is to use these wastes in the pavement industry as sustainable ***,there is still a lack of understanding about the wider incorporation of palm oil waste in asphalt pavement and its *** study examines existing literature on the use of various wastes in the pavement industry,including palm oil clinker(POC),palm oil fibre(POF),palm kernel shell(PKS),and palm oil fuel ash(POFA).As a result,this paper presents a systematic review and scientometric investigation of related study publications on many uses of palm oil waste in the asphalt pavement industry and its performance from 2009 to *** VOS viewer application was used to conduct the sciento-metric study *** relationship between interactions detected in co-authored country studies cited sources of co-citation,and the keyword of the co-occurrence and publication source enabled the identification of the research *** to the systematic literature review,40%–60% POC can be used to fine aggregate for optimal performance,while 0–100%PKS can be used to replace coarse *** addition,50%–80% POFA or POC fine(POCF)can be used as a filler replacement,5%–8% POCF or POFA as a bitumen modifier,and 0.3% POF as a stabilizing ***,the study demonstrates that the safety of utilizing wastes with more than 50% CO_(2) emissions can be curtailed with minimal heavy metal leaching and radioactivity *** scientometric analysis may encourage researchers to seek out gaps in the literature that will aid in the long-term,multifaceted use of palm oil wastes in the asphalt pavement ***,the study recommends employing and researching the enormous potential of using palm oil waste in the pavement sectors because they are more sustainable and have better perfor

关键词： Asphalt pavement Circular economy Eco-friendly Palm oil waste VOSviewer

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Finite element simulation of stress intensity factors in elastic-plastic crack growth

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第8期7卷 1336-1342页

作者： alSHOAIBI abdulnaser m ARIFFIN Ahmad Kamal Computational mechanics Research Group Department of Mechanical and Materials Engineering Faculty of Engineering Universiiy Kebangsaan Malaysia Bangi 43600 Malaysia

A finite element program developed elastic-plastic crack propagation simulation using Fortran language. At each propagation step, the adaptive mesh is automatically refined based on a posteriori h-type refinement using norm stress error estimator. A rosette of quarter-point elements is then constructed around the crack tip to facilitate the prediction of crack growth based on the maximum normal stress criterion and to calculate stress intensity factors under plane stress and plane strain conditions. Crack was modelled to propagate through the inter-element in the mesh. Some examples are presented to show the results of the implementation.

关键词： Crack propagation Nodal displacement Stress intensity factor Adaptive mesh Finite element method (FEm)

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An adaptive finite element procedure for crack propagation analysis

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第2期8卷 228-236页

作者： alSHOAIBI abdulnaser m. HADI m.S.A. ARIFFIN A.K. Department of mechanical & materials Engineering Universiti Kebangsaan malaysia 43600 Bangi Selangor Darul Ehsan Malaysia

This paper presents the adaptive mesh finite element estimation method for analyzing 2D linear elastic fracture problems. The mesh is generated by the advancing front method and the norm stress error is taken as a posteriori error estimator for the h-type adaptive refinement. The stress intensity factors are estimated by a displacement extrapolation technique. The near crack tip displacements used are obtained from specific nodes of natural six-noded quarter-point elements which are generated around the crack tip defined by the user. The crack growth and its direction are determined by the calculated stress intensity factors. The maximum circumference theory is used for the latter. In evaluating the accuracy of the estimated stress intensity factors, four cases are tested consisting of compact tension specimen, three-point bending specimen, central cracked plate and double edge notched plate. These were carried out and compared to the results from other studies. The crack trajectories of these specimen tests are also illustrated.

关键词： Linear elastic fracture mechanics Adaptive refinement Stress intensity factors Crack propagation

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Probabilistic analysis of linear elastic cracked structures

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第11期8卷 1795-1799页

作者： AKRAmIN m.R.m. alSHOAIBI abdulnaser HADI m.S.A. ARIFFIN A.K. mOHAmED N.A.N. Department of mechanical and materials Engineering Universiti Kebangsaan malaysia Bangi 43600 Selangor Darul Ehsan Malaysia

This paper presents a probabilistic methodology for linear fracture mechanics analysis of cracked structures. The main focus is on probabilistic aspect related to the nature of crack in material. The methodology involves finite element analysis; sta- tistical models for uncertainty in material properties, crack size, fracture toughness and loads; and standard reliability methods for evaluating probabilistic characteristics of linear elastic fracture parameter. The uncertainty in the crack size can have a significant effect on the probability of failure, particularly when the crack size has a large coefficient of variation. Numerical example is presented to show that probabilistic methodology based on monte Carlo simulation provides accurate estimates of failure prob- ability for use in linear elastic fracture mechanics.

关键词： Probabilistic fracture mechanics Linear elastic fracture mechanics Failure probability First-order reliability methods

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Finite element model for linear-elastic mixed mode loading using adaptive mesh strategy

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第1期9卷 32-37页

作者： miloud SOUIYAH abdulnaser alSHOAIBI A. mUCHTAR A.K. ARIFFIN Department of mechanical & materials Engineering Universiti Kebangsaan Malaysia Bangi Selangor 43600 Malaysia

An adaptive mesh finite element model has been developed to predict the crack propagation direction as well as to calculate the stress intensity factors （SIFs）, under linear-elastic assumption for mixed mode loading application. The finite element mesh is generated using the advancing front method. In order to suit the requirements of the fracture analysis, the generation of the background mesh and the construction of singular elements have been added to the developed program. The adaptive remeshing process is carried out based on the posteriori stress error norm scheme to obtain an optimal mesh. Previous works of the authors have proposed techniques for adaptive mesh generation of 2D cracked models. Facilitated by the singular elements, the displacement extrapolation technique is employed to calculate the SIK The fracture is modeled by the splitting node approach and the trajectory follows the successive linear extensions of each crack increment. The SlFs values for two different case studies were estimated and validated by direct comparisons with other researchers work.

关键词： Linear-elastic fracture mechanics Adaptive refinement Stress intensity factors (SIFs) Crack propagation

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