Finite element modeling of open-section composite beams with warping restraint effects

AIAA Journal ◽  
1997 ◽  
Vol 35 ◽  
pp. 1341-1347
Author(s):  
Matthew W. Floros ◽  
Edward C. Smith
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Composite Beams ◽  
Element Modeling ◽  
Open Section

FINITE ELEMENT MODELING OF STEEL-CONCRETE COMPOSITE BEAMS STRENGTHENED WITH PRESTRESSED CFRP PLATE

2012 ◽  
Vol 12 (01) ◽  
pp. 23-51 ◽  
Author(s):  
R. EL-HACHA ◽  
P. ZANGENEH ◽  
H. Y. OMRAN
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Parametric Study ◽  
Large Scale ◽  
Composite Beams ◽  
Experimental Results ◽  
Fe Model ◽  
Element Modeling ◽  
Cfrp Plate ◽  
Good Agreement

Results from finite element modeling (FEM) of large-scale steel-concrete composite beams strengthened in flexure with prestressed carbon fiber-reinforced polymer (CFRP) plate were validated with experimental results and presented in this paper. The effect of varying the level of prestressing as percentage of the ultimate tensile strength of the CFRP plate was investigated. Comparison was carried out in terms of overall load-deflection behavior, strain profile along the length of the CFRP plate, and strain distribution across the depth of the beam at mid-span section. Very good agreement was observed between the finite element (FE) and the experimental results. The validated FE models were used to perform a comprehensive parametric study to investigate the changes in the behavior through wider range of prestressing levels and then, determine the optimum prestressing level that maintain the unstrengthened beams' original ductility (or energy absorption). An iterative analytical model was also developed, validated with both the FE model and the experimental results, and showed good agreement. A parametric study was carried out to investigate the effect of changing the yield strength of the steel and the concrete compressive strength on the moment of resistance of the section and the strain in the CFRP plate at ultimate.

scholarly journals Dynamic Response of Orthogonal Three-Dimensional Woven Carbon Composite Beams Under Soft Impact

2015 ◽  
Vol 82 (12) ◽  
Author(s):  
P. Turner ◽  
T. Liu ◽  
X. Zeng
Keyword(s):  
Finite Element ◽  
Composite Materials ◽  
Dynamic Response ◽  
Finite Element Modeling ◽  
High Speed ◽  
Three Dimensional ◽  
Composite Beams ◽  
High Speed Photography ◽  
Element Modeling ◽  
Back Face

This paper presents an experimental and numerical investigation into the dynamic response of three-dimensional (3D) orthogonal woven carbon composites undergoing soft impact. Composite beams of two different fiber architectures, varying only by the density of through-thickness reinforcement, were centrally impacted by metallic foam projectiles. Using high-speed photography, the center-point back-face deflection was measured as a function of projectile impulse. Qualitative comparisons are made with a similar unidirectional (UD) laminate material. No visible delamination occurred in orthogonal 3D woven samples, and beam failure was caused by tensile fiber fracture at the gripped ends. This contrasts with UD carbon-fiber laminates, which exhibit a combination of widespread delamination and tensile fracture. Post impact clamped–clamped beam bending tests were undertaken across the range of impact velocities tested to investigate any internal damage within the material. Increasing impact velocity caused a reduction of beam stiffness: this phenomenon was more pronounced in composites with a higher density of through-thickness reinforcement. A three-dimensional finite-element modeling strategy is presented and validated, showing excellent agreement with the experiment in terms of back-face deflection and damage mechanisms. The numerical analyses confirm negligible influence from through-thickness reinforcement in regard to back-face deflection, but show significant reductions in delamination damage propagation. Finite-element modeling was used to demonstrate the significant structural enhancements provided by the through-the-thickness (TTT) weave. The contributions to the field made by this research include the characterization of 3D woven composite materials under high-speed soft impact, and the demonstration of how established finite-element modeling methodologies can be applied to the simulation of orthogonal woven textile composite materials undergoing soft-impact loading.

Experimental investigation and finite-element modeling of the crushing response of hat shape open section composite

2020 ◽  
pp. 1-12
Author(s):  
Redouane Lombarkia ◽  
Augustin Gakwaya ◽  
Dennis Nandlall ◽  
Marie-Laure Dano ◽  
Julie Lévesque ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Finite Element ◽  
Finite Element Modeling ◽  
Element Modeling ◽  
Open Section
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