Recovery and improvement in low-velocity impact properties of e-glass/epoxy composites through novel self-healing technique

2014 ◽  
Vol 108 ◽  
pp. 277-286 ◽  
Author(s):  
S. Zainuddin ◽  
T. Arefin ◽  
A. Fahim ◽  
M.V. Hosur ◽  
J.D. Tyson ◽  
...  
Keyword(s):  
Epoxy Composites ◽  
Low Velocity Impact ◽  
Self Healing ◽  
Low Velocity ◽  
Impact Properties ◽  
Velocity Impact

Self-healing of low-velocity impact damage in glass fabric/epoxy composites using an epoxy–mercaptan healing agent

2010 ◽  
Vol 20 (1) ◽  
pp. 015024 ◽  
Author(s):  
Yan Chao Yuan ◽  
Yueping Ye ◽  
Min Zhi Rong ◽  
Haibin Chen ◽  
Jingshen Wu ◽  
...  
Keyword(s):  
Impact Damage ◽  
Epoxy Composites ◽  
Low Velocity Impact ◽  
Glass Fabric ◽  
Self Healing ◽  
Low Velocity ◽  
Velocity Impact ◽  
Healing Agent

Optimization of Low-Velocity Impact Properties of E-Glass/Epoxy Composites Using Plasticizing Modifiers

2012 ◽  
Author(s):  
M. M. Rahman ◽  
N. Jahan ◽  
S. Zainuddin ◽  
M. V. Hosur ◽  
S. Jeelani ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Energy Absorption ◽  
Epoxy Composites ◽  
Low Velocity Impact ◽  
Resin System ◽  
Low Velocity ◽  
Flexure Strength ◽  
Impact Properties ◽  
Velocity Impact ◽  
Epoxy Resin System

The prime aim of this work is to enhance the energy absorbing capabilities of e-glass/epoxy composite under low velocity impact using plasticizing modifiers. Epoxy terminated polyol at 5–15 phr loading levels as plasticizing modifier was mixed into two-phase SC-15 epoxy resin system by a high speed mechanical stirrer. Modified epoxy resin system was then used to fabricate E-glass/epoxy composites by hot press processing. Low velocity impact test at two different energy levels was carried out to investigate the effectiveness of incorporating plasticizing modifier on impact properties of these composites. In addition, three point bend test was also conducted to examine the effects on flexure properties with plasticizing modifiers. Incorporation of epoxy terminated polyol in E-glass/epoxy laminates proved efficient with a significant improvement of 23% in impact energy absorption capability over control counterpart. On the other hand, flexure strength and modulus has been decreased upon polyol loading whereas failure strain has been increased. The flexible polymer chain of polyol group inserted between epoxy molecules by chemical reaction enhances the ductility of the composites and reduces the number of cross-linking. Hence, energy absorption capability or overall toughness was found to increase with a slight reduction of peak strength and flexure strength and stiffness.

Recovery of Low-Velocity Impact Properties of Glass Fiber Reinforced Composites Through Self-Healing Technique

2013 ◽  
Author(s):  
Shaik Zainuddin ◽  
Arefin Tauhid ◽  
Mahesh V. Hosur ◽  
Shaik Jeelani ◽  
Ashok Kumar
Keyword(s):  
Glass Fibers ◽  
Energy Levels ◽  
Peak Load ◽  
Low Velocity Impact ◽  
Self Healing ◽  
Low Velocity ◽  
Impact Properties ◽  
Velocity Impact ◽  
Significant Recovery ◽  
Control Samples

In this study, we report the self-healing of e-glass/epoxy composites achieved through embedding self-healing agents (SHA) filled hollow glass fibers (HGFs). At first, catalytic technique was used to fill bonded HGFs with SHA. The HGFs were then laid on e-glass fibers and the laminates were fabricated using vacuum assisted resin molding (VARIM) technique. Low-velocity impact tests at two different energy levels were conducted multiple times in the closest proximity to determine the healing efficiency. Optical microscopic study was done to see the changes in the SHA filled HGFs samples before and after impact. Results showed significant recovery of impact properties with 4.47% lost in peak load after second impact in SHA samples whereas it was 27.7% in control samples. The loss in energy to peak load was 20.44% in SHA filled samples, whereas 41% in control samples. Optical microscopy images showed filling of cracks produced after impact with SHA reflecting the significant recovery of impact properties.

Influence of Fiber Orientation and Fillers on Low Velocity Impact Response of the Fabric Reinforced Epoxy Composites

2021 ◽  
Author(s):  
M. Bunea ◽  
V. Bria ◽  
F. S. Silva ◽  
I. G. Bîrsan ◽  
M. Buciumeanu
Keyword(s):  
Fiber Orientation ◽  
Impact Response ◽  
Epoxy Composites ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact

scholarly journals Low-velocity impact response of 3D woven hybrid epoxy composites with carbon and heterocyclic aramid fibres

2021 ◽  
pp. 107314
Author(s):  
Caizheng Wang ◽  
Dandan Su ◽  
Zhifeng Xie ◽  
Ke Zhang ◽  
Ning Wu ◽  
...  
Keyword(s):  
Impact Response ◽  
Epoxy Composites ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Aramid Fibres

Effect of SiO2 Nanoparticles on the Mechanical and Low Velocity Impact Properties of Epoxy/Glass Composites

2016 ◽  
Vol 838 ◽  
pp. 29-35
Author(s):  
Michał Landowski ◽  
Krystyna Imielińska
Keyword(s):  
Flexural Strength ◽  
Energy Absorption ◽  
Impact Energy ◽  
Epoxy Matrix ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Nanoparticle Suspension ◽  
Impact Properties ◽  
Velocity Impact ◽  
The Impact

Flexural strength and low velocity impact properties were investigated in terms of possibile improvements due to epoxy matrix modification by SiO2 nanoparticles (1%, 2%, 3%, 5%, 7%wt.) in glass/epoxy laminates formed using hand lay-up method. The matrix resin was Hexion L285 (DGEBA) with Nanopox A410 - SiO2 (20 nm) nanoparticle suspension in the base epoxy resin (DGEBA) supplied by Evonic. Modification of epoxy matrix by variable concentrations of nanoSiO2 does not offer significant improvements in the flexural strength σg, Young’s modulus E and interlaminar shear strength for 1% 3% and 5% nanoSiO2 and for 7% a slight drop (up to ca. 15-20%) was found. Low energy (1J) impact resistance of nanocomposites represented by peak load in dynamic impact characteristics was not changed for nanocompoosites compared to the unmodified material. However at higher impact energy (3J) nanoparticles appear to slightly improve the impact energy absorption for 3% and 5%. The absence or minor improvements in the mechanical behaviour of nanocomposites is due to the failure mechanisms associated with hand layup fabrication technique: (i.e. rapid crack propagation across the extensive resin pockets and numerous pores and voids) which dominate the nanoparticle-dependent crack energy absorption mechanisms (microvoids formation and deformation).

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