Computational and Experimental Investigation of the Low Velocity Impact Behavior of Nano Engineered E-Glass Fiber Reinforced Composite Laminates

2012 ◽  
Author(s):  
Abu Rasel ◽  
Evan Kimbro ◽  
Ram Mohan ◽  
Ajit D. Kelar
Keyword(s):  
Composite Laminates ◽  
Energy Levels ◽  
Electrospun Nanofibers ◽  
Low Velocity Impact ◽  
Impact Behavior ◽  
Low Velocity ◽  
Velocity Impact ◽  
Glass Fiber Reinforced ◽  
Impact Energies ◽  
The Impact

This paper presents computational and experimental investigation of the low velocity impact behavior of nano engineered E-glass fiber reinforced composite laminates. The Tetra Ethyl Orthosilicate (TEOS) chemically engineered glass nanofibers were manufactured using electrospinning technique and were investigated for their potential to improve the interlaminar properties. Plain weave fiberglass prepregs were used for manufacturing ten ply thick laminates. For production of the laminates with electrospinning interface layers the addition of the electrospinning sheets and an additional layer of resin film was used. The fabricated laminates were subjected to low velocity impacts of various energy levels to study the progressive damage and deformation mechanics of fiberglass laminates with and without electrospun nanofibers. The low velocity impact behavior was modeled using the transient dynamic finite element program LSDYNA. It was observed that the simulations results are in good agreement with the experimental results for lower impact energies. In addition, the simulated maximum impact force is smaller than the experimental value (soft response) at each drop height and at higher energy levels, the area under impact force vs time increases when electrospun nanofibers are used in the laminates. The study indicates that, the impact duration increases when electrospun nanofibers are used. Impact duration increases due to an additional damage accumulations in electrospun nanofibers layers. Both computational and experimental investigations clearly indicate that inserting interlaminar electrospun nanofiber layers improves the impact resistance of composites by absorbing additional impact energies.

Low-velocity impact behavior of glass fiber epoxy composites modified with nanoceramic particles

2019 ◽  
Vol 54 (16) ◽  
pp. 2217-2228
Author(s):  
Harish Kallagunta ◽  
Jitendra S Tate
Keyword(s):  
Energy Levels ◽  
Epoxy Composites ◽  
Low Velocity Impact ◽  
Impact Behavior ◽  
Initial Stiffness ◽  
Low Velocity ◽  
Velocity Impact ◽  
Damage Area ◽  
New Type ◽  
Impact Energies

The introduction of new type of nanomaterials has provided challenges in a deeper level understanding of mechanical behavior and failure mechanisms of fiber-reinforced composites. In this study, a comparison of low-velocity impact behavior of E-Glass epoxy composites modified with 10 wt% nanosilica and 2.5 wt% Nafen™ alumina nanofibers manufactured using vacuum-assisted resin transfer molding is reported. Low-velocity impact tests at three impact energies of 29 J, 39 J, and 50 J are conducted and impact responses, such as impact strength, absorbed energy, and damage area are determined and compared for the two nanoparticles. The damage sustained by composite samples is evaluated by optical microscopy and infrared thermography. Nanosilica-incorporated composites showed rigid behavior, whereas alumina nanofiber-modified composites showed increased stiffness at increased energy of impact as observed from the initial stiffness and deflection of samples. The degree of damage in case of 10 wt% nanosilica-modified composites is reduced by 7.04%, 3.96%, and 7.92% for energy levels of 29 J, 39 J, and 50 J respectively when compared to nonmodified composites, whereas 2.5 wt% alumina nanofiber-modified composites showed 1.66%, −7.35%, and 26.39% for energy levels of 29 J, 39 J, and 50 J, respectively.

Low Velocity Impact of Carbon/Zylon and Carbon/Kevlar Composite Laminates

Materials ◽  
2005 ◽  
Author(s):  
Kamaldeen Yusuff ◽  
Mohammad Mahinfalah ◽  
Amin Salehi-Khojin ◽  
Mohammad Alimi
Keyword(s):  
Carbon Fiber ◽  
Composite Laminates ◽  
Energy Levels ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Low Modulus ◽  
Side Face ◽  
Impact Side ◽  
The Impact

The response of composite laminates to low velocity impact at different energy levels for carbon fiber, carbon/Zylon and carbon/Kevlar composites were investigated in this study. The samples consisted of impact-side face sheet having different combination of 8-layer carbon, 6-layer carbon/2-layer Zylon and 6-layer carbon/2-layer Kevlar laminates. Tests were conducted at energy levels of 8J, 15J, 25J, and 50J. The aim of this study was to investigate the impact of adding a high modulus fiber or low modulus fiber to carbon fiber with respect to Low velocity impact at different energy levels. Results and overall conclusions for each of the composite laminates are presented in detail.

Low-velocity impact response of pre-stressed glass fiber/nanotube filled epoxy composite tubes

2020 ◽  
pp. 002199832096155
Author(s):  
Mustafa Taşyürek ◽  
Memduh Kara
Keyword(s):  
Glass Fiber ◽  
Ultrasonic Method ◽  
Energy Levels ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Impact Behavior ◽  
Low Velocity ◽  
Velocity Impact ◽  
Force Time ◽  
The Impact

The aim of this study is to investigate the low velocity impact behavior of pre-stressed glass fiber/epoxy (GRP) nanocomposite tubes. During the production of filament wound tubes with a winding angle of ±55°, carbon nanotubes (CNT) were introduced to the epoxy resin at 0.5%wt and 1.0%wt by ultrasonic method. The nanocomposite tubes were pre-stressed to 32 bars internal pressure, one of the specified operating pressures according to ANSI/AWWA C950 standards. Low velocity impact tests were performed on the pure and CNT added pre-stressed GRP tubes at 5, 10 and 15 Joule energy levels. As a result of the experiments, the contact force-time, force-displacement graphs and absorbed energy values by the samples were obtained. In addition, the damage zones on the specimens were investigated. The effects of CNT reinforcements on the impact response and damage mechanisms of the specimens were evaluated. By adding CNT, it was observed that the damage areas of the samples decreased and was found to affect the impact response of nanocomposite tubes.

scholarly journals Impact and Post Impact Behavior of Hybrid Composites

2018 ◽  
Vol 11 (4) ◽  
pp. 46-52
Author(s):  
Aidel Kadum Jassim Al-shamary
Keyword(s):  
Impact Energy ◽  
Hybrid Composites ◽  
Energy Levels ◽  
Testing Machine ◽  
Impact Testing ◽  
Low Velocity Impact ◽  
Impact Behavior ◽  
Low Velocity ◽  
Velocity Impact ◽  
The Impact

In this study, the effect of low velocity impact  response of Kevlar/carbon hybrid composite has been investigated. Then the impacted specimens were subjected to compression and buckling tests at room temperature experimentally. The height, width and thickness of the specimens are 150, 100 and 2.1 mm, respectively. Impact tests have been performed under different impact energy levels by using low velocity impact testing machine. Compression and buckling tests were conducted by Shimadzu testing machine. According to obtained results, the damage increases by increasing the impact energy level in the subjected specimens to impact test.  Compression strength value is higher about 3  times than buckling strength value.

scholarly journals Investigation of damage to thick composite laminates under low-velocity impact and frequency-sweep vibration loading conditions

2020 ◽  
Vol 12 (10) ◽  
pp. 168781402096504
Author(s):  
Miaomiao Duan ◽  
Zhufeng Yue ◽  
Qianguang Song
Keyword(s):  
Composite Laminates ◽  
Energy Levels ◽  
Experimental Tests ◽  
Element Model ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Internal Damage ◽  
Frequency Sweep ◽  
Velocity Impact ◽  
The Impact

A detailed investigation of damage and failure mechanisms of composite laminates under low-velocity impact (LVI) by experimental tests and numerical modeling is presented. Five impact energy levels were investigated on composite laminates by drop-weight tests. Permanent indentations were measured, and delamination areas of each interface induced by each LVI event were captured using an ultrasonic C-scan. The 3D volume elements with a user-defined, material-based finite element model (FEM) has been applied to predict the LVI event considering damage modes, including intra-ply damage and inter-ply damage. The results of the FEM were found to agree well with experimental observations. Internal damage of the laminate during the impact process was analyzed. For thick laminates, the initiation of damage is observed at the first layer, and then spreads from the impact surface to the back, leading to a pine-type damage pattern as the thickness increases. Frequency-sweep vibration tests of composite laminates subjected to LVI events were studied under a “fixed ends” boundary condition. Our results show that it is reasonable to use frequency-sweep vibration experiments to evaluate the damage of laminates subjected to LVI events.

scholarly journals Low velocity impact behavior of interlayer hybrid composite laminates with carbon/glass/basalt fibres

2019 ◽  
Vol 176 ◽  
pp. 107191 ◽  
Author(s):  
Dongdong Chen ◽  
Quantian Luo ◽  
Maozhou Meng ◽  
Qing Li ◽  
Guangyong Sun
Keyword(s):  
Hybrid Composite ◽  
Composite Laminates ◽  
Low Velocity Impact ◽  
Impact Behavior ◽  
Low Velocity ◽  
Velocity Impact

Analysis on Low Velocity Impact Damage and Compressive Residual Strength of Composite Laminates

2014 ◽  
Vol 566 ◽  
pp. 463-467
Author(s):  
Pu Xue ◽  
H.H. Chen ◽  
W. Guo
Keyword(s):  
Experimental Data ◽  
Residual Strength ◽  
Composite Laminates ◽  
Damage Mechanics ◽  
Impact Damage ◽  
Numerical Results ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
The Impact

This paper studies the impact damage under low velocity impact for composite laminates based on a nonlinear progressive damage model. Damage evolution is described by the framework of the continuum damage mechanics. The real impact damage status of composite laminates has been used to analyze the residual compressive strength instead of assumptions on damage area after impact. The validity of the methodologies has been demonstrated by comparing the numerical results with the experimental data available in literature. The delamination area has an error of 11.3%. The errors of residual strength and compressive displacement are 8.9% and 15%, which indicate that the numerical results matched well with the experimental data.

Impact Behaviour of Woven Natural Silk Composite Face-Sheet Sandwiched Foam under Low Velocity Impact

2013 ◽  
Vol 774-776 ◽  
pp. 1242-1249 ◽  
Author(s):  
Albert U. Ude ◽  
Ahmad K. Ariffin ◽  
Che H. Azhari
Keyword(s):  
Impact Load ◽  
Energy Levels ◽  
Low Velocity Impact ◽  
Face Sheet ◽  
Low Velocity ◽  
Velocity Impact ◽  
Natural Silk ◽  
Damage Initiation ◽  
The Impact ◽  
Composite Face

This paper describes the result of an experimental investigation on the impact damage on woven natural silk/epoxy composite face-sheet and PVC foam core sandwich panel. The test panels were prepared by hand-lay-up method. The low-velocity impact response of the composites sandwich panels is studied at three energy levels of 32, 48, and 64 joule respectively. The focus is to investigate damage initiation, damage propagation, and mechanisms of failure. It was observed that absorption energy capability decreased as impact energy increased. There was deflection on each impact load configuration at some point but their margin was insignificant. Physical examination of the specimen show that damage areas increased with increase in impact load. The novelty of this research is the use of woven natural silk fabric as a reinforcement fibre.

Failure Analysis of CCF300/5428 Laminates under Low Velocity Impact Based on Properties of Advanced Composite Material

2013 ◽  
Vol 387 ◽  
pp. 185-188
Author(s):  
Jian Yu Zhang ◽  
Ming Li ◽  
Li Bin Zhao ◽  
Bin Jun Fei
Keyword(s):  
Failure Analysis ◽  
Composite Laminates ◽  
Damage Model ◽  
Failure Criteria ◽  
Low Velocity Impact ◽  
Material System ◽  
Low Velocity ◽  
3D Fem ◽  
Velocity Impact ◽  
The Impact

A progressive damage model (PDM) composed by 3D FEM, Hashin and Ye failure criteria and Changs degradation rules was established to deeply understand the failure of a new material system CCF300/5428 under low velocity impact. User defined subroutines were developed and embedded into the general FEA software package to carry out the failure analysis. Numerical simulations provide more information about the failure of composite laminates under low velocity impact, including initial damage status, damage propagation and final failure status. The history of the impact point displacement and various damage patterns were detailed studied.

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