Buckling behavior of double skin composite walls under axial compressive load

The fire resistance of double skin composite wall (DSCW) system composed of two profiled steel sheets and concrete infill is investigated through use of finite element (FE) methods. The fire resistance of DSCW when exposed to elevated temperature and a constant axial compressive load with different infill materials such as self-consolidating concrete (SCC), engineered cementitious concrete (ECC) and ultra-high performance concrete (UHPC) is investigated. The influence of parameters such as load level, thickness of steel sheets, depth of concrete core and fastener arrangement on the fire resistance of the DSCW are established. The performance of SCC-based DSCW has the best fire resistance followed by ECC and UHPC-based composite walls. The increase in load level decreases the fire resistance while the increase in depth of concrete infill increases the fire resistance of the composite wall. The fastener arrangement and steel thickness have no significant influence on the resulting fire resistance.

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Finite Element Modelling of the Fire Resistance of Double Skin Composite Walls Subjected to Monotonic Compressive Loading

10.32920/ryerson.14661150 ◽

2021 ◽

Author(s):

Mohamed Yanis Bournas

Keyword(s):

Finite Element ◽

Fire Resistance ◽

High Performance Concrete ◽

Compressive Load ◽

Load Level ◽

Concrete Core ◽

Steel Sheets ◽

Double Skin ◽

Composite Wall ◽

Composite Walls

The fire resistance of double skin composite wall (DSCW) system composed of two profiled steel sheets and concrete infill is investigated through use of finite element (FE) methods. The fire resistance of DSCW when exposed to elevated temperature and a constant axial compressive load with different infill materials such as self-consolidating concrete (SCC), engineered cementitious concrete (ECC) and ultra-high performance concrete (UHPC) is investigated. The influence of parameters such as load level, thickness of steel sheets, depth of concrete core and fastener arrangement on the fire resistance of the DSCW are established. The performance of SCC-based DSCW has the best fire resistance followed by ECC and UHPC-based composite walls. The increase in load level decreases the fire resistance while the increase in depth of concrete infill increases the fire resistance of the composite wall. The fastener arrangement and steel thickness have no significant influence on the resulting fire resistance.

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Experimental and Numerical Analyses on the Buckling Characteristics of Woven Flax/Epoxy Laminated Composite Plate under Axial Compression

Polymers ◽

10.3390/polym13070995 ◽

2021 ◽

Vol 13 (7) ◽

pp. 995

Author(s):

Venkatachalam Gopalan ◽

Vimalanand Suthenthiraveerappa ◽

Jefferson Stanley David ◽

Jeyanthi Subramanian ◽

A. Raja Annamalai ◽

...

Keyword(s):

Environmental Sustainability ◽

Composite Plate ◽

Compressive Load ◽

Laminated Composite ◽

Green Composite ◽

Laminated Composite Plate ◽

Axial Compressive Load ◽

Number Of Layers ◽

Structural Applications ◽

Ply Orientation

The evolution of a sustainable green composite in various loadbearing structural applications tends to reduce pollution, which in turn enhances environmental sustainability. This work is an attempt to promote a sustainable green composite in buckling loadbearing structural applications. In order to use the green composite in various structural applications, the knowledge on its structural stability is a must. As the structural instability leads to the buckling of the composite structure when it is under an axial compressive load, the work on its buckling characteristics is important. In this work, the buckling characteristics of a woven flax/bio epoxy (WFBE) laminated composite plate are investigated experimentally and numerically when subjected to an axial compressive load. In order to accomplish the optimization study on the buckling characteristics of the composite plate among various structural criterions such as number of layers, the width of the plate and the ply orientation, the optimization tool “response surface methodology” (RSM) is used in this work. The validation of the developed finite element model in Analysis System (ANSYS) version 16 is carried out by comparing the critical buckling loads obtained from the experimental test and numerical simulation for three out of twenty samples. A comparison is then made between the numerical results obtained through ANSYS16 and the results generated using the regression equation. It is concluded that the buckling strength of the composite escalates with the number of layers, the change in width and the ply orientation. It is also noted that the weaving model of the fabric powers the buckling behavior of the composite. This work explores the feasibility of the use of the developed green composite in various buckling loadbearing structural applications. Due to the compromised buckling characteristics of the green composite with the synthetic composite, it has the capability of replacing many synthetic composites, which in turn enhances the sustainability of the environment.

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Axial Crushing of Multicorner Sheet Metal Columns

Journal of Applied Mechanics ◽

10.1115/1.3176030 ◽

1989 ◽

Vol 56 (1) ◽

pp. 113-120 ◽

Cited By ~ 319

Author(s):

W. Abramowicz ◽

T. Wierzbicki

Keyword(s):

Sheet Metal ◽

Compressive Load ◽

Structural Plasticity ◽

Finite Deformations ◽

Kinematic Parameters ◽

Arbitrary Angle ◽

Axial Compressive Load ◽

Crushing Force ◽

Thin Walled ◽

Theory And Experiments

A method is developed for predicting crush behavior of multicorner prismatic columns subjected to an axial compressive load. The corner element of an arbitrary angle is analyzed first using rigorous methods of structural plasticity with finite deformations and rotations. On that basis, crush predictions are made for multicorner columns with an even number of corners. Static crush tests on square, hexagonal, and rhomboidal thin-walled columns are also reported here. Good correlation between the theory and experiments was obtained for the magnitude of a mean crushing force and kinematic parameters describing the process of progressive folding.

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