Journal of Science and Transport Technology

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Nonlinear buckling and postbuckling of spiral stiffened FG-GPLRC cylindrical shells subjected to torsional loads
Journal of Science and Transport Technology - - 2021
Kha Hoa Le, Tho Hung Vu, Hong Quan Pham, Hoai Nam Vu
The nonlinear buckling behavior of functionally graded graphene platelet reinforced composite (FG-GPLRC) cylindrical shells reinforced by ring, stringer and/or spiral FG-GPLRC stiffeners under torsional loads is studied by an analytical approach. The governing equations are based on the Donnell shell theory with geometrical nonlinearity of von Kármán-Donnell-type, combining the improvability of Le...... hiện toàn bộ
#Functionally graded graphene platelet reinforced composite (FG-GPLRC) #Spiral stiffener #Nonlinear buckling #Torsional load #Cylindrical shell
Temperature effect on the characteristic quantities of microstructure and phase transition of the alloy Ag0.25Au0.75
Journal of Science and Transport Technology - - 2023
Ștefan Țălu , Tuan Quoc Tran, Hoang Van Ong, Ha Thi Vu, Duyen Thi Tran, Thu-Cuc Thi Nguyen
In this research, Molecular Dynamics (MD) simulations were conducted to explore the temperature effect on the microstructure and phase transition of the Ag0.25Au0.75 alloy. The findings reveal that as the temperature rises, the material's phase transition switches from crystalline to liquid and vice versa. Notably, during the phase transition, significant changes occur in the link length (r), the ...... hiện toàn bộ
#Ag0.25Au0.75 alloy #microstructure #molecular dynamics #phase transition #temperature.
Nonlinear buckling and postbuckling analysis of cylindrical and sinusoid FG-GPLRC panels under axial compressive load
Journal of Science and Transport Technology - - Trang 44-53 - 2023
Dao Quang Huy, Nguyen Thi Phuong
This paper presents and analyzes the nonlinear buckling responses of cylindrical and sinusoid Functionally graded graphene platelet reinforced composite (FG-GPLRC) panels under axial compressive load. The higher-order shear deformation theory is applied to establish the governing equations of structures. The stress function is approximated using the like-Galerkin method, and the Galerkin method is...... hiện toàn bộ
#Graphene platelet reinforced composite; Elastic foundation; Sinusoid panel; Cylindrical panel; Buckling and Postbuckling
Nonlinear dynamic buckling analysis of the FG-GPLRC cylindrical and sinusoid panels with porous core under time-dependent axial compression
Journal of Science and Transport Technology - - Trang 13-22 - 2024
Nguyen Thi Phuong, Vu Minh Duc, Luu Ngoc Quang
The nonlinear dynamic buckling responses of functionally graded graphene platelet reinforced composite (FG-GPLRC) cylindrical and sinusoid panels with porous core are presented in this paper. The governing formulations are established by applying the nonlinear higher-order shear deformation theory (HSDT). an approximation technique is used to determine the stress function for complexly curved pane...... hiện toàn bộ
#Sinusoid panel; Cylindrical panel; Dynamic buckling; Higher-order shear deformation theory (HSDT); Nonlinear mechanics; Functionally graded graphene platelet-reinforced composite
Prediction of compressive strength of concrete at high heating conditions by using artificial neural network-based Bayesian regularization
Journal of Science and Transport Technology - Tập 2 Số 1 - Trang 9-21 - 2022
Marijana Hadzima-Nyarko, Son Hoang Trinh
Cement concrete is the most commonly used material today for constructing residential or commercial buildings, industrial parks, or particular components such as tunnel slabs where there is a high risk of fire. This structure requires concrete to be subjected to high temperatures generated by fires. However, concrete under the influence of high temperature has very complex behavior states with def...... hiện toàn bộ
#Machine learning #ANN #compressive strength #Bayesian regularization #K-fold cross-validation
Forecasting Construction Price Index using Artificial Intelligence Models: Support Vector Machines and Radial Basis Function Neural Network
Journal of Science and Transport Technology - - Trang 9-19 - 2022
Tuan Thanh Nguyen, Dam Duc Nguyen, Son Duc Nguyen, Indra Prakash, Phong Van Tran, Binh Thai Pham
Estimation of Construction Price Index (CPI) is important for a market economy and it is a measure to manage construction investment costs. This is a tool to help organizations and individuals to reduce the effort and management of expenses for construction projects by reducing time of procedures for calculating and adjusting the total investment for the estimation and evaluation of contract p...... hiện toàn bộ
#Construction price index #Artificial Intelligence #SVM #RBFN
Estimating the Compressive Strength of Self-compacting Concrete with fiber using an Extreme Gradient Boosting model
Journal of Science and Transport Technology - - 2023
Indra Prakash, Thanh-Nhan Phan, Hai-Van Thi Mai
Self-compacting concrete reinforced with fiber (SCCRF) is extensively utilized in the construction and transportation industries due to its numerous advantages, such as ease of building in challenging sites, noise reduction, enhanced tensile strength, bending strength, and decreased structural cracking. Traditional methods for assessing the compressive strength of SCCRF are generally time-consumin...... hiện toàn bộ
#Compressive strength (CS) #Self-compacting concrete reinforced with fiber (SCCRF) #Extreme Gradient Boosting (XGB)
Nonlinear buckling responses of radially pressured FG-GPLRC toroidal shell segments
Journal of Science and Transport Technology - Tập 3 Số 2 - Trang 19-25 - 2023
Luu Ngoc Quang, Nguyen Thi Phuong
An analytical approach for nonlinear buckling of functionally graded graphene platelet reinforced composite toroidal shell segments is presented in this paper. The Ritz energy procedure is executed, and radial pressure–deflection expression is constituted to obtain the postbuckling strength and critical buckling pressure of the shells. Significant influences on the buckling responses of shells wit...... hiện toàn bộ
#Nonlinear buckling #Toroidal shell segment #FG-GPLRC #Radially pressured shell #Ritz energy method.
Estimation of California Bearing Ratio of Soils Using Random Forest based Machine Learning
Journal of Science and Transport Technology - - 2021
Dung Quang Vu, Duc Dam Nguyen, Quynh-Anh Thi Bui, Duong Kien Trong, Indra Prakash, Binh Thai Pham
California Bearing Ratio (CBR) is an essential parameter utilized to evaluate the strength of the soil subgrades and base course materials of different types of pavements. In this study, the Machine Learning (ML) approach has been adopted using Random Forest (RF) model to estimate the CBR of the soil based on 10 input parameters such as Plasticity Index (PI), Liquid Limit (LL), Silt Clay content (...... hiện toàn bộ
#Machine Learning #California Bearing Ratio #Random Forest
Buckling behavior of spiral stiffened sandwich FGM cylindrical shells with porous core under axial compression using the FSDT
Journal of Science and Transport Technology - - Trang 1-9 - 2023
Hoang Quan Nguyen, Minh Duc Vu, Thi Phuong Nguyen, Ngoc Ly Le, Thi My Trang Nguyen
The linear buckling behavior of functionally graded cylindrical shells with porous core stiffened by spiral stiffeners under axial compression using the first-order shear deformation theory is presented in this paper. The improved Lekhnitskii’s smeared stiffeners technique is applied for shear deformable spiral FGM stiffeners. Approximate analytical solutions are assumed to satisfy the simply supp...... hiện toàn bộ
#Functionally graded material #Porous core #Spiral stiffener #Linear buckling #Axial compression #Cylindrical shell #First-order shear deformation theory
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