Dynamic Behavior of Carbon Fiber Explosion Containment Vessels

2015 ◽  
Vol 138 (1) ◽  
Author(s):  
Qi Dong ◽  
Bayi Hu
Keyword(s):  
Carbon Fiber ◽  
Dynamic Response ◽  
Glass Fiber ◽  
Dynamic Behavior ◽  
Experimental Observation ◽  
Scale Effect ◽  
Failure Modes ◽  
Cylindrical Shells ◽  
Load Bearing ◽  
Internal Blast Loading

The dynamic behavior of carbon fiber containment vessels subjected to internal blast loading is studied. The experimental observation of dynamic response of carbon fiber cylindrical shells is presented, in which failure modes of structures are especially concerned. The load-bearing capability and scale effect of carbon fiber cylindrical shells are discussed. Carbon fiber cylindrical shells demonstrate better explosion-resistant performance than that of glass fiber cylindrical shells for the specific types of tests and shell configurations investigated. The current study may contribute to the further understanding on the design and application of carbon fiber containment vessels.

Experimental Study on Composite Containment Vessels

2014 ◽  
Author(s):  
Qi Dong ◽  
Yan Gu
Keyword(s):  
Experimental Study ◽  
Carbon Fiber ◽  
Dynamic Response ◽  
Glass Fiber ◽  
Failure Modes ◽  
Fiber Composite ◽  
Experimental Results ◽  
Carbon Fiber Composite ◽  
Glass Fiber Composite ◽  
Design And Application

In this paper, we present experimental results of tests performed on composite containment vessels. The experimental observations of dynamic response of glass fiber composite vessels and carbon fiber composite vessels are compared, in which the carbon fiber composite vessels demonstrate better performance than that of glass fiber composite vessels. The study on the failure of composite vessels is also presented, in which it is found that failure modes of glass fiber composite vessels and carbon fiber composite vessels are different. The current study may contribute to the further understanding on the design and application of composite containment vessels.

Experimental Tests on Strengthened Masonry Vaults

2014 ◽  
Vol 578-579 ◽  
pp. 1396-1399 ◽  
Author(s):  
Łukasz Hojdys ◽  
Piotr Krajewski
Keyword(s):  
Carbon Fiber ◽  
Glass Fiber ◽  
Failure Modes ◽  
Cement Mortar ◽  
Experimental Tests ◽  
Load Carrying Capacity ◽  
Lime Mortar ◽  
Clay Bricks ◽  
Load Carrying ◽  
Masonry Vaults

This paper reports and discusses the results of experiments performed on masonry barrel vaults strengthened externally with a composite material. The vaults characterized by 125-mm thickness, 2000-mm internal span and 730-mm rise, were built of solid clay bricks and lime mortar. As a strengthening glass fiber grids or carbon fiber grids were used. They were embedded in a polymer-cement mortar at the vaults extrados. The main aim of presented research was to determine load-carrying capacity and examine failure modes of tested specimens. The results of performed tests show that observed failure modes depended on reinforcement ratio of strengthening layer. The specimen strengthened with one layer of glass fiber grid failed due to fibers rupture, whereas the vault strengthened with carbon fiber grid failed due to sliding along a mortar joint just above the abutment.

scholarly journals Dynamic Response of Steel Box Girder under Internal Blast Loading

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Shujian Yao ◽  
Nan Zhao ◽  
Zhigang Jiang ◽  
Duo Zhang ◽  
Fangyun Lu
Keyword(s):  
Shock Wave ◽  
Dynamic Response ◽  
Failure Modes ◽  
Numerical Study ◽  
Blast Loading ◽  
Deformation Degree ◽  
Box Girder ◽  
Steel Box Girder ◽  
Internal Shock ◽  
Internal Blast Loading

This paper aims at investigating the dynamic response of the steel box girder under internal blast loads through experiments and numerical study. Two blast experiments of steel box models under internal explosion were conducted, and then, the numerical methods are introduced and validated. The dynamic response process and propagation of the internal shock wave of a steel box girder under internal blast loading were investigated. The results show that the propagation of the internal shock wave is very complicated. A multi-impact effect is observed since the shock waves are restricted by the box. In addition, the failure modes and the influence of blast position as well as explosive mass were discussed. The holistic failure mode is observed as local failure, and there are two failure modes for the steel box girder's components, large plastic deformation and rupture. The damage features are closely related to the explosive position, and the enhanced shock wave in the corner of the girder will cause severe damage. With the increasing TNT mass, the crack diameter and the deformation degree are all increased. The longitudinal stiffeners restrict the damage to develop in the transverse direction while increase the crack diameter along the stiffener direction.

scholarly journals Seismic Retrofitting of RC Circular Columns Using Carbon Fiber, Glass Fiber, or Ductile PET Fiber

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Donguk Choi ◽  
Seongwon Hong ◽  
Myung-Kwan Lim ◽  
Sang-Su Ha ◽  
Sorrasak Vachirapanyakun
Keyword(s):  
Carbon Fiber ◽  
Glass Fiber ◽  
Failure Modes ◽  
Plastic Hinge ◽  
Seismic Retrofitting ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Strain Behavior ◽  
Reinforced Polymer ◽  
Non Linear

AbstractThe effectiveness of seismic retrofitting using three different fibers—carbon fiber (CF), glass fiber (GF), polyethylene terephthalate (PET) fiber—and a fiber combination of aramid fiber (AF) and PET fiber (called hybrid fiber reinforced polymer (HF)) wrapped on reinforced concrete (RC) circular columns was experimentally evaluated. A total of 11 RC circular columns were tested: three control columns and eight retrofitted columns in three different test groups. The purpose of fiber wrapping was flexural strength improvement as well as enhancement of rotational capacity in the plastic hinge region. Mechanical properties of CF, GF, AF, and PET were first defined; that is, CF, GF, and AF exhibited linear stress–strain behavior with limited ultimate strain capacity typically less than 3%, while ductile PET exhibited as much as 15% strain and non-linear stress–strain behavior with a very low elastic modulus. In the RC column tests, all three different fibers and the AF + PET fiber combination were effective in enhancing the strength and ductility but resulted in different structural behaviors and failure modes depending on the fiber type and the fiber amount used. The column sections were then analytically studied by section analysis using the behavior of confined concrete, the non-linear relationship of fiber-reinforced polymer (FRP), and the actual material properties of reinforcement. The analytical and experimental results revealed that ductile PET is beneficial, as it demonstrates more ductile behavior with a degree of strength enhancement similar to that of CF and GF.

Strengthening of Prefab Slab using Fiber Reinforce Composites

2017 ◽  
Vol MCSP2017 (01) ◽  
pp. 27-29
Author(s):  
Gitanjali Biswal ◽  
Manoj Kumar Rath ◽  
Sagarika Panda
Keyword(s):  
Glass Fiber ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Structural Members ◽  
Load Bearing ◽  
Concrete Members ◽  
Shrinkage Cracks ◽  
Glass Fiber Reinforced ◽  
New Material ◽  
Fiber Reinforce

The main objective of using strengthening of pre fab slab by wraping with frp to to make it more durable during shock as a modification for the prevention of shrinkage cracks. The aim of research is to strengthening of Pre-fab structures slab using glass fiber reinforced composites. Slabs will act as structural members; provide a sensible application for the new material because they can be casted as load bearing and non-load bearing concrete members.

scholarly journals Comparison of Mode Shapes of Carbon-Fiber-Reinforced Plastic Material Considering Carbon Fiber Direction

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 311
Author(s):  
Chan-Jung Kim
Keyword(s):  
Carbon Fiber ◽  
Modal Analysis ◽  
Dynamic Behavior ◽  
Mode Shapes ◽  
Modal Parameters ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Direction ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic

Previous studies have demonstrated the sensitivity of the dynamic behavior of carbon-fiber-reinforced plastic (CFRP) material over the carbon fiber direction by performing uniaxial excitation tests on a simple specimen. However, the variations in modal parameters (damping coefficient and resonance frequency) over the direction of carbon fiber have been partially explained in previous studies because all modal parameters have only been calculated using the representative summed frequency response function without modal analysis. In this study, the dynamic behavior of CFRP specimens was identified from experimental modal analysis and compared five CFRP specimens (carbon fiber direction: 0°, 30°, 45°, 60°, and 90°) and an isotropic SCS13A specimen using the modal assurance criterion. The first four modes were derived from the SCS13A specimen; they were used as reference modes after verifying with the analysis results from a finite element model. Most of the four mode shapes were found in all CFRP specimens, and the similarity increased when the carbon fiber direction was more than 45°. The anisotropic nature was dominant in three cases of carbon fiber, from 0° to 45°, and the most sensitive case was found in Specimen #3.

scholarly journals Flexural bearing capacity and failure mechanism of CFRP-aluminum laminate beam with double-channel cross-section

2021 ◽  
Vol 28 (1) ◽  
pp. 139-152
Author(s):  
Teng Huang ◽  
Dongdong Zhang ◽  
Yaxin Huang ◽  
Chengfei Fan ◽  
Yuan Lin ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Bearing Capacity ◽  
Failure Mechanism ◽  
Cross Section ◽  
Failure Criterion ◽  
Failure Modes ◽  
Channel Cross Section ◽  
Fiber Layer ◽  
Flexural Bearing Capacity ◽  
Double Channel

Abstract In this study, the flexural bearing capacity and failure mechanism of carbon fiber-reinforced aluminum laminate (CARALL) beams with a double-channel cross-section and a 3/2 laminated configuration were experimentally and numerically studied. Two types of specimens using different carbon fiber layup configurations ([0°/90°/0°]3 and [45°/0°/−45°]3) were fabricated using the pressure molding thermal curing forming process. The double-channel CARALL beams were subjected to static three-point bending tests to determine their failure behaviors in terms of ultimate bearing capacity and failure modes. Owing to the shortcomings of the two-dimensional Hashin failure criterion, the user-defined FORTRAN subroutine VUMAT suitable for the ABAQUS/Explicit solver and an analysis algorithm were established to obtain a progressive damage prediction of the CFRP layer using the three-dimensional Hashin failure criterion. Various failure behaviors and mechanisms of the CARALL beams were numerically analyzed. The results indicated that the numerical simulation was consistent with the experimental results for the ultimate bearing capacity and final failure modes, and the failure process of the double-channel CARALL beams could be revealed. The ultimate failure modes of both types of double-channel CARALL beams were local buckling deformation at the intersection of the upper flange and web near the concentrated loading position, which was mainly caused by the delamination failure among different unidirectional plates, tension and compression failure of the matrix, and shear failure of the fiber layers. The ability of each fiber layer to resist damage decreased in the order of 90° fiber layer > 0° fiber layer > 45° fiber layer. Thus, it is suggested that 90°, 0°, and 45° fiber layers should be stacked for double-channel CARALL beams.

scholarly journals Enhanced Impact Properties of Hybrid Composites Reinforced by Carbon Fiber and Polyimide Fiber

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2599
Author(s):  
Boyao Wang ◽  
Bin He ◽  
Zhanwen Wang ◽  
Shengli Qi ◽  
Daijun Zhang ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Failure Modes ◽  
Flexural Modulus ◽  
Charpy Impact ◽  
Fiber Reinforced Composites ◽  
Stacking Sequence ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Polyimide Fiber

A series of hybrid fiber-reinforced composites were prepared with polyimide fiber and carbon fiber as the reinforcement and epoxy resin as the matrix. The influence of stacking sequence on the Charpy impact and flexural properties of the composites as well as the failure modes were studied. The results showed that hybrid fiber-reinforced composites yielded nearly 50% increment in Charpy impact strength compared with the ones reinforced by carbon fiber. The flexural performance was significantly improved compared with those reinforced solely by polyimide fibers and was greatly affected by the stacking sequence. The specimens with compressive sides distributed with carbon fiber possessed higher flexural strength, while those holding a sandwich-like structure with carbon fiber filling between the outer layers displayed a higher flexural modulus.

Sign in / Sign up

Export Citation Format

Share Document