High velocity impact properties of composites reinforced by stitched and unstitched glass woven fabrics

2021 ◽  
pp. 152808372199986
Author(s):  
Zeynab Behroozi ◽  
Hooshang Nosraty ◽  
Majid Tehrani
Keyword(s):  
High Velocity ◽  
Woven Fabrics ◽  
Ballistic Impact ◽  
Woven Fabric ◽  
Impact Behavior ◽  
Stacking Sequence ◽  
High Velocity Impact ◽  
Velocity Impact ◽  
Damage Area ◽  
Properties Of Composites

The present research aimed to investigate the effect of stitching angle and stacking sequence of stitched layers on high velocity impact behavior of composites reinforced by glass woven fabrics. To study the effect of stitching angle on ballistic impact behavior, six different angles of (0°), (90°), (45°), (0°,90°), (±45°) and (0°,90°,±45°) were chosen as stitching angles. These stitching angles were applied on eight layers of glass woven fabric. To study the effect of stacking sequence of stitched layers, a different number of layers were stitched together with the angle of 0°. Unstitched and stitched composites were exposed to high velocity impact with 180 m/s using a spherical projectile. The residual velocity of projectile and dimensions of damage area on the composites’ front and back sides were measured. It was found that the sample with the 45° stitching angle had the best behavior against ballistic impact and its energy absorption was significantly higher than the other samples. Stitching also reduces damage area in front and back sides of the composites and inhibits delamination.

Modeling and simulation of impact behavior of 3D woven solid structure for ballistic application

2020 ◽  
pp. 152808372098046
Author(s):  
Lekhani Tripathi ◽  
Soumya Chowdhury ◽  
BK Behera
Keyword(s):  
Numerical Models ◽  
Woven Fabrics ◽  
Ballistic Impact ◽  
Woven Fabric ◽  
Low Velocity Impact ◽  
Impact Behavior ◽  
Low Velocity ◽  
Velocity Impact ◽  
The Impact ◽  
Analytical Approaches

This study was carried out to understand and evaluate the response of 3 D woven fabrics upon the simulated ballistic forces. Under the low-velocity impact, analytical and numerical models were developed for determining the impact energy, which was used to evaluate the ballistic impact of projectile onto multiple-layered woven fabric panels based on the ballistic impact of single textile yarns. The behavior of primary and secondary yarns in a fabric under the ballistic impact was analyzed by both the models. The mechanisms of failure and energy dissipation of Kevlar fabric subjected to low-velocity impact were numerically investigated by using the ABAQUS platform as a tool of finite element method (FEM). The results obtained from numerical and analytical approaches were validated against experimental value which showed a good agreement.

scholarly journals High-velocity impact behavior of hybrid fiber-reinforced epoxy composites

2021 ◽  
Vol 43 (9) ◽  
Author(s):  
Clifton Stephen ◽  
B. Shivamurthy ◽  
Abdel-Hamid I. Mourad ◽  
Rajiv Selvam
Keyword(s):  
Energy Absorption ◽  
High Velocity ◽  
Composite Laminates ◽  
Epoxy Composite ◽  
Matrix Cracking ◽  
Impact Behavior ◽  
Stacking Sequence ◽  
High Velocity Impact ◽  
Velocity Impact ◽  
Hybrid Fabric

AbstractIn this study, non-hybrid and hybrid (Kevlar, carbon and glass) fabric epoxy composite laminates were fabricated with different stacking sequences by hand lay-up followed by hot-compression molding. Experimental tests were conducted to investigate tensile, flexural, and hardness characteristics. It was found that the stacking sequence did not significantly affect the tensile strength and hardness values of the composites; however, it affected their flexural strength. Damage morphology of the specimens through SEM images showed that the major damage mechanisms in the composites were delamination, fiber breakage, pull-out, and matrix cracking. Based on the static experimental results, the high-velocity impact behavior was investigated through simulation study using LS-DYNA finite element analysis (FEA) software. To study the ballistic impact, a steel projectile with a hemispherical penetrating edge at impact velocities of 100 m.s−1, 250 m.s−1, and 350 m.s−1 was considered. Among non-hybrid fabric epoxy composite specimens, Kevlar/epoxy specimen was found to have the highest impact energy absorption followed by carbon/epoxy and glass/epoxy, respectively. Regarding the hybrid fabric epoxy composite specimens, the ones with Kevlar plies in the rear face exhibited better energy absorption compared to other stacking sequences. The non-hybrid glass/epoxy specimen had the lowest energy absorption and highest post-impact residual velocity of projectile among all specimens. From the FEA results, it was noted that impact resistance of hybrid composites improved when Kevlar fabric was placed in the rear layer. Thus, the stacking sequence was observed to be of substantial importance in the development of fabric-reinforced composite laminates for high-velocity impact applications.

Improvement in impact resistance performance of glass/epoxy composite through carbon nanotubes and silica nanoparticles

2016 ◽  
Vol 232 (9) ◽  
pp. 785-799 ◽  
Author(s):  
Zahra Naghizadeh ◽  
Mehdi Faezipour ◽  
Mohammad Hossein Pol ◽  
Gholam Hossein Liaghat ◽  
Ali Abdolkhani
Keyword(s):  
Silica Nanoparticles ◽  
High Velocity ◽  
Polymer Matrix Composites ◽  
Impact Resistance ◽  
Experimental Studies ◽  
Impact Behavior ◽  
Matrix Composites ◽  
High Velocity Impact ◽  
Velocity Impact ◽  
Multi Walled Carbon Nanotube

Experimental studies are presented on the high velocity impact behavior of nanomaterial dispersed resin viz laminates made using E-glass fabric with epoxy resin. The nanomaterials used are silica nanoparticles and carboxyl functionalized multi-walled carbon nanotube (COOH-MWCNT) for polymer matrix composites. The composites' ballistic limit ( Vbl) and impact energy absorbed ( Eab) were determined by subjecting the material to impact loading of 85, 100, and 112 m/s by conical nose projectile. It was found that the high velocity impact response of epoxy composites improved when a nanomaterial was used as reinforcement. COOH-MWCNTs reinforced composites exhibited better energy absorption than silica nanoparticles composites. Moreover, the damage pattern for different types of materials studied is presented. It is observed that the damage size on the target around the point of impact decreases on addition of nanoparticles especially COOH-MWCNTs. Quantitative data are presented for high velocity impact behavior of the seven types of specimens studied.

scholarly journals The Impact Performance of Woven-Fabric Thermoplastic and Thermoset Composites Subjected to High-Velocity Soft- and Hard-Impact Loading

2019 ◽  
Vol 26 (5-6) ◽  
pp. 1389-1410 ◽  
Author(s):  
Jun Liu ◽  
Haibao Liu ◽  
Cihan Kaboglu ◽  
Xiangshao Kong ◽  
Yuzhe Ding ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Impact Loading ◽  
High Velocity ◽  
Image Correlation ◽  
Woven Fabric ◽  
High Velocity Impact ◽  
Velocity Impact ◽  
Impact Performance ◽  
The Impact ◽  
Carbon Fibre Composites

Abstract The present paper investigates the impact performance of woven-fabric carbon-fibre composites based upon both thermoplastic- and thermoset-matrix polymers under high-velocity impact loading by conducting gas-gun experiments at impact velocities of up to 100 m.s−1. The carbon-fibre reinforced-polymers (CFRPs) are impacted using soft- (i.e. gelatine) and hard- (i.e. aluminium-alloy) projectiles to simulate either a soft bird-strike or a hard foreign-body impact (e.g. runway debris), respectively, on typical composites employed in civil aircraft. The out-of-plane displacements of the impacted composite specimen are obtained by means of a three-dimensional Digital Image Correlation (DIC) system for the soft-projectile impact on the composites and the extent of damage is assessed both visually and by using portable C-scan equipment. The perforation resistance and energy absorbing capability of the composites are also studied by performing high-velocity impact experiments using the hard-projectile and the resulting extent and type of damage are identified. In addition, a Finite Element (FE) model is also developed to investigate the interaction between the projectile and the composite target.

scholarly journals A numerical study on the high-velocity impact behavior of pressure pipes

2016 ◽  
Vol 17 (6) ◽  
pp. 443-453 ◽  
Author(s):  
Zhen-yu Wang ◽  
Yang Zhao ◽  
Guo-wei Ma ◽  
Zhi-guo He
Keyword(s):  
High Velocity ◽  
Numerical Study ◽  
Impact Behavior ◽  
High Velocity Impact ◽  
Velocity Impact ◽  
Pressure Pipes
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