scholarly journals Corrigendum to “Numerical analysis of axially loaded rectangular concrete-filled steel tubular short columns at elevated temperatures” [Eng. Struct. 180 (2019) 89–102]

2020 ◽  
Vol 210 ◽  
pp. 109068
Author(s):  
Ghanim Mohammed Kamil ◽  
Qing Quan Liang ◽  
Muhammad N.S. Hadi
Keyword(s):  
Numerical Analysis ◽  
Elevated Temperatures ◽  
Short Columns ◽  
Axially Loaded

scholarly journals Numerical analysis of axially loaded rectangular concrete-filled steel tubular short columns at elevated temperatures

2019 ◽  
Vol 180 ◽  
pp. 89-102 ◽  
Author(s):  
Ghanim Mohammed Kamil ◽  
Qing Quan Liang ◽  
Muhammad N.S. Hadi
Keyword(s):  
Numerical Analysis ◽  
Elevated Temperatures ◽  
Short Columns ◽  
Axially Loaded

scholarly journals Numerical analysis of axially loaded circular high strength concrete-filled double steel tubular short columns

2019 ◽  
Vol 138 ◽  
pp. 105-116 ◽  
Author(s):  
Mizan Ahmed ◽  
Qing Quan Liang ◽  
Vipulkumar Ishvarbhai Patel ◽  
Muhammad N.S. Hadi
Keyword(s):  
Numerical Analysis ◽  
High Strength Concrete ◽  
High Strength ◽  
Strength Concrete ◽  
Short Columns ◽  
Axially Loaded

A Coupled Temperature-Displacement Numerical Analysis of Hydraulic Press Workspace

2016 ◽  
Author(s):  
Jakub Jirasko ◽  
Antonin Max ◽  
Radek Kottner
Keyword(s):  
Numerical Analysis ◽  
Computational Model ◽  
Automotive Industry ◽  
Elevated Temperatures ◽  
Compressive Force ◽  
Hydraulic Press ◽  
Metallic Materials ◽  
Pressing Force ◽  
Stress Criterion ◽  
The Press

The analysis is performed on a hydraulic press which is intended for use in the automotive industry and is a part of a production line. The final phase of manufacture of interior and acoustic parts takes place in this press. These interior and acoustic parts are made of sandwich fabric which is inserted into the heated mould of the press and by treatment with a defined pressure (or, more precisely, a defined compression) and temperature, it is formed into its final shape. This press has a frame with four columns and it is not preloaded. Two double acting hydraulic cylinders placed on an upper cross beam exert the compressive force. Due to continuously increasing demands on the accuracy and quality of products not only in the automotive industry, it is necessary to ensure compliance with the accuracy of certain values of machine operation. Especially in this case, the value of accuracy substantially depends on the clamping plates of the press, for which a certain value of flatness is required, both at room temperature and at elevated temperatures. To achieve this accuracy, it is necessary to guarantee sufficient stiffness of the machine to resist the pressing force with the smallest deformation possible. Another crucial factor affecting the accuracy of the machine is heating of the heated clamping plates. Unequal heating of parts of the frame causes additional deformation that has to be quantified and eliminated. The main aim was to verify the design of the press by numerical computation and gather knowledge for modifying the topological design of the press so that it fulfils the required customer parameters of flatness and parallelism for different types of loading. A computational model of the press was created for the numerical solution of a coupled temperature-displacement numerical analysis. The analysis was performed using the finite element method in Abaqus software. The press is symmetrical in two orthogonal planes and the load of the press is considered to be centric. On the basis of these two factors it was possible to carry out the analysis by considering only a quarter of the press. The analysis was used to investigate the effects of static and combined loads from the pressing force and heat on the press. The influence of a cooling circuit located in the press frame for the reduction of frame deformation (and deformation of clamping plates) was investigated. Contacts were defined among individual parts to ensure the computational model had characteristics as close as possible to the real press. The analysis was solved as stationary, on the basis that the cooling of the tool between individual pressing cycles is negligible. The insulating plates are made of a particulate composite material which was considered to have isotropic properties depending on the temperature. For strength evaluation of composite materials all individual components of the stress tensor were examined according to the maximum stress criterion. Hook’s law was considered to be valid for the metallic materials. Von Mises criterion was used to evaluate the strength of the metallic materials. The geometry of the press was discretized using 3D linear thermally coupled brick elements with 8 nodes and full integration (C3D8T). There were approximately 174,000 elements in total. Design procedures for designing a press frame with higher work accuracy (flatness) were proposed with the example of the simplified model of the press table. With these methods it is possible to achieve times higher accuracy than is achieved with conventional method.

scholarly journals Numerical Analysis of Axial Compression Performance of Concrete Filled Double Steel Tube Short Columns

2018 ◽  
Vol 439 ◽  
pp. 042058
Author(s):  
Jing Ji ◽  
Dianyou Yu ◽  
Liangqin Jiang ◽  
Shilong Zhang ◽  
Maomao Yang
Keyword(s):  
Numerical Analysis ◽  
Axial Compression ◽  
Steel Tube ◽  
Compression Performance ◽  
Short Columns

Numerical analysis of axially loaded RC columns subjected to the combination of impact and blast loads

2020 ◽  
Vol 219 ◽  
pp. 110924 ◽  
Author(s):  
Gholamreza Gholipour ◽  
Chunwei Zhang ◽  
Asma Alsadat Mousavi
Keyword(s):  
Numerical Analysis ◽  
Blast Loads ◽  
Rc Columns ◽  
Axially Loaded

Numerical Investigation of a Masonry Column Reinforced by the Helical Reinforcement

2014 ◽  
Vol 923 ◽  
pp. 225-228 ◽  
Author(s):  
Marek Jašek ◽  
Lucie Mynarzová ◽  
Jan Hurta ◽  
Jiri Brozovsky
Keyword(s):  
Numerical Analysis ◽  
Numerical Investigation ◽  
Civil Engineering ◽  
Advanced Materials ◽  
Masonry Structures ◽  
Axially Loaded ◽  
New Buildings ◽  
Visual Changes

In recent years numerous advanced materials technologies have appeared in the market or have been developed for use in construction. In civil engineering there are also numerous fields of application for these materials, which can be used for construction of new buildings as well as for reparation and improvement of older structures. In many cases the helical reinforcement is used for the improvement and rehabilitation of masonry structures. This type of reinforcement offers several advantages. It requires only minimal changes of the existing masonry elements and it introduces no visual changes of the rehabilitated structure. In the paper a numerical analysis and an assessment are presented of such a helical reinforcement for the improvement of axially loaded masonry columns.

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