Static and Dynamic Strength of Scarf-Repaired Thick-Section Composite Plates

2008 ◽  
pp. 95-95-15
Author(s):  
BA Gama ◽  
S Mahdi ◽  
C Cichanowski ◽  
S Yarlagadda ◽  
JW Gillespie
Keyword(s):  
Dynamic Strength ◽  
Composite Plates ◽  
Thick Section

Ballistic Damage Evaluation of Thick-Section S-2 Glass/SC15 Composites With and Without Predefined Delaminations

Materials ◽  
2004 ◽  
Author(s):  
Bazle A. Gama ◽  
Mostafezur Rahman ◽  
Chris P. R. Hoppel ◽  
John W. Gillespie
Keyword(s):  
Composite Plates ◽  
Damage Evaluation ◽  
Thick Section ◽  
Residual Velocity ◽  
Damage Mechanisms ◽  
X Ray ◽  
Composite Damage ◽  
Energy Dissipated ◽  
The Impact ◽  
Energy Balance Approach

Thick-section composites made from plain weave (5×5) S-2 glass fabrics and toughened API epoxy SC15 resin are impacted with right circular cylinder projectiles at different impact velocities, and at support span of diameter 101.6-mm. The impact and residual velocity of the projectiles are measured using flash X-Ray. Ballistic energy dissipated in the composite plates is determined following an energy balance approach. The damage mechanisms under ballistic impact are evaluated by sectioning each composite plate through the impact axis. Composite damage mechanisms are presented as a function of dimensionless impact and residual velocity, VI/V50 and VR/V50, respectively. It has been identified that the damage mechanisms are significantly different in case of partial-penetration (VR/V50=0), than the case of complete-penetration (VR/V500). The effect of pre-defined delamination planes on the ballistic limit and damage is investigated.

Methods for three-dimensional reconstruction of cellular components within a thick section

1986 ◽  
Vol 44 ◽  
pp. 18-21
Author(s):  
J. Frank ◽  
B. F. McEwen ◽  
M. Radermacher ◽  
C. L. Rieder
Keyword(s):  
Tilt Angle ◽  
Tomographic Reconstruction ◽  
3D Structure ◽  
Three Dimensional ◽  
Thick Section ◽  
Three Dimensional Reconstruction ◽  
Axis Ratio ◽  
Dimensional Reconstruction ◽  
Cellular Components

The tomographic reconstruction from multiple projections of cellular components, within a thick section, offers a way of visualizing and quantifying their three-dimensional (3D) structure. However, asymmetric objects require as many views from the widest tilt range as possible; otherwise the reconstruction may be uninterpretable. Even if not for geometric obstructions, the increasing pathway of electrons, as the tilt angle is increased, poses the ultimate upper limitation to the projection range. With the maximum tilt angle being fixed, the only way to improve the faithfulness of the reconstruction is by changing the mode of the tilting from single-axis to conical; a point within the object projected with a tilt angle of 60° and a full 360° azimuthal range is then reconstructed as a slightly elliptic (axis ratio 1.2 : 1) sphere.

Effect of hygrothermal relaxation stresses during ageing for composite plates

2011 ◽  
Vol 99 (3) ◽  
pp. 305-316
Author(s):  
A. Benkhedda ◽  
E.A. Adda bedia ◽  
A. Tounsi ◽  
A. Mahi
Keyword(s):  
Composite Plates

Concrete Girders Externally Prestressed With Composite Plates

PCI Journal ◽  
1994 ◽  
Vol 39 (3) ◽  
pp. 40-51 ◽  
Author(s):  
Hamid Saadatmanesh ◽  
Mohammad R. Ehsani
Keyword(s):  
Composite Plates ◽  
Concrete Girders
Sign in / Sign up

Export Citation Format

Share Document