scholarly journals High-velocity impact responses of 2618 aluminum plates for engine containment systems under combined actions of projectile form and oblique angle

2019 ◽  
Vol 32 (6) ◽  
pp. 1428-1441 ◽  
Author(s):  
Cunxian WANG ◽  
Tao SUO ◽  
Yulong LI ◽  
Pu XUE ◽  
Zhongbin TANG
Keyword(s):  
High Velocity ◽  
High Velocity Impact ◽  
Oblique Angle ◽  
Velocity Impact ◽  
Combined Actions ◽  
Impact Responses ◽  
Aluminum Plates

Analyses on the In-Plane Impact Resistance of Auxetic Double Arrowhead Honeycombs

2015 ◽  
Vol 82 (5) ◽  
Author(s):  
Jinxiu Qiao ◽  
Chang Qing Chen
Keyword(s):  
Energy Absorption ◽  
High Velocity ◽  
Theoretical Models ◽  
Absorption Capacity ◽  
Functionally Graded ◽  
High Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Impact Responses ◽  
The Impact

Double arrowhead honeycombs (DAHs) are a type of auxetic materials, i.e., showing negative Poisson's ratio (NPR), and are promising for energy absorption applications. Their in-plane impact responses are theoretically and numerically explored. Theoretical models for the collapse stress under quasi-static, low-velocity, and high-velocity impacts are developed, based upon the corresponding microstructural deformation modes. Obtained results show that the collapse stress under quasi-static and low velocity impacts depends upon the two re-entrant angles responsible for NPR, while it is insensitive to them under high-velocity impact. The developed theoretical models are employed to analyze the energy absorption capacity of DAHs, showing the absorbed energy under high-velocity impact approximately proportional to the second power of velocity. Extension of the high-velocity impact model to functionally graded (FG) DAHs is also discussed. Good agreement between the theoretical and finite element (FE) predictions on the impact responses of DAHs is obtained.

High Velocity Impact Testing for Evaluation of Intermetallic Projectiles

2019 ◽  
Author(s):  
Colton B. Cagle ◽  
Kevin J. Hill ◽  
Connor Woodruff ◽  
Michelle L. Pantoya ◽  
Joseph Abraham ◽  
...  
Keyword(s):  
High Velocity ◽  
High Speed ◽  
Impact Testing ◽  
Testing System ◽  
High Velocity Impact ◽  
Flame Spreading ◽  
Lower Velocity ◽  
Velocity Impact ◽  
Target Interaction ◽  
Aluminum Plates

Abstract Experiments were performed to study penetration through multiple aluminum plates followed by impact into an inert steel anvil using a High-velocity Impact-ignition Testing System (HITS). The projectiles are intermetallic pellets launched from a propellant driven gun into a catch chamber equipped with view ports and imaging diagnostics. Penetration, impact and reaction are monitored using high-speed cameras that provide local and macroscopic perspectives of projectile and target interaction as well as overall reactivity. Results demonstrate the range of visual data that can be captured by a non-gas generating intermetallic projectile that fragments and reacts upon penetration and impact. Results show that higher velocity projectiles (~ 1300 and 800 m/s) produce smaller fragments upon target penetration that result in flame spreading through the chamber upon impact while lower velocity projectiles (~ 500 m/s) negligibly fragment upon target penetration and produce no flames even upon anvil impact.

Effect of strain rate, off-axis loading and high-velocity impact damage on the compressive strength of C/SiC composite

2018 ◽  
Vol 53 (4) ◽  
pp. 535-546 ◽  
Author(s):  
M Altaf ◽  
S Singh ◽  
VV Bhanu Prasad ◽  
Manish Patel
Keyword(s):  
Compressive Strength ◽  
Strain Rate ◽  
High Velocity ◽  
Impact Damage ◽  
The Other ◽  
High Velocity Impact ◽  
Fibre Bundles ◽  
Velocity Impact ◽  
Kink Bands ◽  
Other Hand

The compressive strength of C/SiC composite at different strain rates, off-axis orientations and after high-velocity impact was studied. The compressive strength was found to be 137 ± 23, 130 ± 46 and 162 ± 33 MPa at a strain rate of 3.3 × 10−5, 3.3 × 10−3, 3.3 × 10−3 s−1, respectively. On the other hand, the compressive strength was found to be 130 ± 46, 99 ± 23 and 87 ± 9 MPa for 0°/90°, 30°/60° and 45°/45° fibre orientations to loading direction, respectively. After high-velocity impact, the residual compressive strength of C/SiC composite was found to be 58 ± 26, 44 ± 18 and 36 ± 3.5 MPa after impact with 100, 150 and 190 m/s, respectively. The formation of kink bands in fibre bundles was found to be dominant micro-mechanism for compressive failure of C/SiC composite for 0°/90° orientation. On the other hand, delamination and the fibre bundles rotation were found to be the dominant mechanism for off-axis failure of composite.

scholarly journals Analysis of High Velocity Impact on Hybrid Composite Fan Blades

1980 ◽  
Vol 17 (10) ◽  
pp. 763-766 ◽  
Author(s):  
C. C. Chamis ◽  
J. H. Sinclair
Keyword(s):  
Hybrid Composite ◽  
High Velocity ◽  
High Velocity Impact ◽  
Velocity Impact
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