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September 8, 2010
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Welcome to ASCGENOA.com
The Leading Software Solution for Material and Structural Failure Analysis
Quick News & Press Release
GENOA 4.4 Released
NANO Capability Introduced
New PFA Unit Cell
New MCO Unit Cell
Issue #18 - 7/13/2009
Numerical Approach to Determine Crack Path and Delamination Growth in Composite Structures
Issue #16 - 10/20/2008
Material Qualification and Certification Determine Allowables by Means of Virtual Simulation Combined With Limited Testing
Issue #15 - 6/10/2008
Predicting Post-Buckling Response and Ultimate Failure of Composite 2-Stringer Panels
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Advanced Composite Technology (ACT) Three Stringer Panel
The model shown is a three-stringer stiffened panel subject to
uniaxial tension. It measures 40 inches long by 24 inches
wide. The distance between stringers is 8 inches while the
stringer height is 1.8 inches. The discrete source damage
(DSD) was simulated by a slit in the panel center. Slit length
was 7 inches. The finite element model had 1208 thick shell
elements and 1518 nodes. An adaptive mesh scheme was employed
to catch the stress concentration at crack fronts during crack
growth. The analysis demonstrated GENOA's ability to model
and determine structural residual strengths. Such an analysis
process can reduce the cost and time required to certify the
damage tolerance of primary wing structures against DSD events.
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Static
ACT Damages
Animation
of the analysis with a display of the force loading
at the edge and the node damages occurring with their
respective damage criteria types displayed in percentages.
Watch
Video
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Static
ACT Ply Damages
Animation
of the ply schedule areas assigned throughout the
model with damages involved in the first ply schedule
area. Four plies are selected and shown simultaneously
through the use of mesh layers stacked in the Z direction.
Watch
Video
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Static
ACT Photo-Elasticity
Animation
of the analysis using a photoelastic camera view of
the strain distribution.
Watch
Video
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T-Joint Model
T-joint with a Pi section reinforcement that was originally designed
for X-37 mini space plane. GENOA simulation demonstrated
how the joint failed around the juncture area.
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T-Joint
Ply Schedules
Demonstration
of the ply schedule areas assigned to the model
before analysis.
Watch
Video
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T-Joint
Force Loading
Demonstration
of damage evolution due to an applied load at the
bottom of the upright.
Watch Video
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T-Joint
Damages
Animation
of the analysis, showing the node damages occurring
and their respective damage criteria types (displayed
with percentages).
Watch Video
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T-Joint
Ply Damages
Demonstration
of the ply damages involved in the first ply schedule
area. Eight plies are selected and shown simultaneously
through the use of mesh layers stacked in the Z
direction.
Watch
Video
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T-Joint
Ply Damages Part 2
A
different view of the ply damages in a different
stacking orientation with two ply schedule areas
selected at the same time.
Watch
Video
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Filament Winding (FW) Model
This model demonstrated the winding and PFA analysis of a 20"
inch length tank with spherical end domes using a combination
of helical and hoop tape windings. Fiber orientation and
tank thickness can be accurately predicted with GENOA-FW.
The radius was about 3.2 inch. The tank had an aluminum
liner overwrapped by composite. GENOA-PFA predicted a burst
pressure of 11,200 psi. This was only 4.5 percent off from
observed test value of 10,700psi. The first node fracture
was detected when the pressure reach 11,200 psi. After the
fracture initialed, it propagated to adjacent nodes very
rapidly with no pressure increase. Therefore, the tank burst
pressure is 11,200 psi.
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FW
Ply Angles
Overview
of the ply angle distribution used after the winding
process is completed with layer-by-layer showing
and color spectrum display.
Watch
Video
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FW
Displacements
Graphical
display of the displacements occuring in X, Y, and
Z directions with color shading showing magnitude.
Watch Video
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FW
Damages
The
playback of the analysis with the node damages occuring
and their respective damage criteria types displayed
with percentages.
Watch Video
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FW
Ply Damages
Demonstration
of the ply damages involved in the first 4 plies
including the inner liner.
Watch Video
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FW
Photo-Elasticity
The
playback of the analysis with a Photo-Elastic camera
view of the strain distribution.
Watch Video
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