The Energy Absorption of Carbon Fiber Reinforced Polymer under Different Impact Speed

2012 ◽  
Vol 535-537 ◽  
pp. 174-177
Author(s):  
Guo Zheng Quan ◽  
Ying Tong ◽  
Gui Sheng Li
Keyword(s):  
Carbon Fiber ◽  
Energy Absorption ◽  
Impact Velocity ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Element Analysis ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced ◽  
The Impact

In order to investigate the energy absorption of carbon fiber reinforced polymer (CFRP) under different impact velocity, ABAQUS finite element analysis software was used to simulate the impact experiments under the velocities of 1～100m/s. The kinetic energy reduction of the bullet was analyzed. The results shows that: the energy absorption of the composites panel improves with the initial impact velocity increasing, while as the velocity increasing to a certain value, such energy absorption approaches a constant value. And taking further analysis found that property of impact resistance of CFRP has a speed effect, with the strain rate increasing, the dynamic mechanical properties improve.

scholarly journals The Impact of the HMCFRP Ratio on the Strengthening of Steel Composite I-Beams

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
E. Agcakoca ◽  
M. Aktas
Keyword(s):  
Finite Element ◽  
Carbon Fiber ◽  
Polymer Materials ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Steel Beams ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced ◽  
The Impact

Carbon fiber-reinforced polymer materials have become popular in the construction industry during the last decade for their ability to strengthen and retrofit concrete structures. The recent availability of high-modulus carbon fiber-reinforced polymer strips (HMCFRP) has opened up the possibility of using this material in strengthening steel structures as well. The strips can be used in steel bridge girders and structures that are at risk of corrosion-induced cross-sectional losses, structural deterioration from aging, or changes in function. In this study, a set of bending experiments was performed on three types of steel beams reinforced with HMCFRP. The results were used to enhance a nonlinear finite element model built with ABAQUS software. The accuracy of the mathematical models for HMCFRP, epoxy, and steel profiles was compared with the experimental results, and the ability of HMCFRP to continue carrying load from the steel beams during rupture and postrupture scenarios was observed using numerical analysis. Using these verified finite element models, a parametric analysis was performed on the HMCFRP failure modes and the quantity to be used with IPE profile steel beams. The maximum amount of HMCFRP needed for strengthening was determined, and an upper limit for its use was calculated to avoid any debonding failure of the fiber material.

scholarly journals PARAMETRIC STUDY OF SQUARE REINFORCED CONCRETE COLUMNS CONFINED BY CARBON FIBER REINFORCED POLYMER UNDER UNIAXIAL LOAD

2021 ◽  
Vol 25 (Special) ◽  
pp. 4-13-4-21
Author(s):  
Basim M. Talib ◽  
◽  
Hayder A. Mehdi ◽  
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Concrete Columns ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Concrete Columns ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced ◽  
The Impact

This paper studies the effects of the behavior of normal strength square concrete (NSC) columns confined by carbon fiber-reinforced polymer (CFRP) sheets. Six reinforced concrete columns of dimensions (100mmx100mmx1200mm) have been casted and tested, those samples have been subjected to uniaxial compression load (eccentricity=0.5b) up to failure. Included the study the impact of three parameters which are the CFRP distribution (5 strips and fully wrapping), column slenderness ratio (40, 30) and steel reinforcement ratio (ρ= 0.0113, 0.0314, 0.0678). Those results showed high improvements in the columns’ load capacity of cracking and ultimate load for all the columns.

Acoustic emission monitoring and finite element analysis of debonding in fiber-reinforced polymer rebar reinforced concrete

2016 ◽  
Vol 16 (6) ◽  
pp. 674-681 ◽  
Author(s):  
Weijie Li ◽  
Siu Chun Michael Ho ◽  
Devendra Patil ◽  
Gangbing Song
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Acoustic Emission Technique ◽  
Element Analysis ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

The acoustic emission technique is widely used for mechanical diagnostics and damage characterization in reinforced concrete structures. This article experimentally investigated the feasibility of debonding characterization in fiber-reinforced polymer rebar reinforced concrete using acoustic emission technique. To this end, carbon-fiber-reinforced polymer rebar reinforced concrete specimens were prepared and they were subjected to pullout tests to study the interfacial debonding between concrete and reinforcement. Test results showed that the debonding failure between concrete and reinforcement was characterized by the total peeling off of the helical wrapping layer of the carbon-fiber-reinforced polymer reinforcement. The response of acoustic emission activity was analyzed by descriptive parameters, such as cumulative acoustic emission hits, amplitude, and peak frequency. The evolution of debonding failure is thus characterized by these acoustic emission parameters. The results demonstrated a clear correlation between the damage evolution of carbon-fiber-reinforced polymer rebar pullout and the acoustic emission parameters. In addition, finite element analysis was adopted to study the stress field during the pullout of the reinforcement. The simulation results agreed well with the experimental investigations.

Restoring Initially Cracked Reinforced Concrete Beams utilizing Carbon Fiber Reinforced Polymer Strips

2019 ◽  
Vol 7 (1) ◽  
pp. 30-34
Author(s):  
A. Ajwad ◽  
U. Ilyas ◽  
N. Khadim ◽  
Abdullah ◽  
M.U. Rashid ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Loading Test ◽  
Control Beam ◽  
Reinforced Polymer ◽  
Cfrp Sheet ◽  
Carbon Fiber Reinforced

Carbon fiber reinforced polymer (CFRP) strips are widely used all over the globe as a repair and strengthening material for concrete elements. This paper looks at comparison of numerous methods to rehabilitate concrete beams with the use of CFRP sheet strips. This research work consists of 4 under-reinforced, properly cured RCC beams under two point loading test. One beam was loaded till failure, which was considered the control beam for comparison. Other 3 beams were load till the appearance of initial crack, which normally occurred at third-quarters of failure load and then repaired with different ratios and design of CFRP sheet strips. Afterwards, the repaired beams were loaded again till failure and the results were compared with control beam. Deflections and ultimate load were noted for all concrete beams. It was found out the use of CFRP sheet strips did increase the maximum load bearing capacity of cracked beams, although their behavior was more brittle as compared with control beam.

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