Test Results: Composite Panel Deflection & Stiffness

  • Thread starter Thread starter har_rai
  • Start date Start date
  • Tags Tags
    Test
Click For Summary
SUMMARY

The discussion focuses on the discrepancies between hand calculations and test results for the deflection and stiffness of a composite panel under uniform pressure load. The user observed that hand equations yielded higher deflection values, leading to an unacceptable stiffness calculation. The conversation emphasizes the importance of considering the panel's material properties, particularly in complex laminates, to ensure accurate stiffness assessments.

PREREQUISITES
  • Understanding of composite materials and their properties
  • Familiarity with stiffness and deflection calculations
  • Knowledge of hand calculation methods for structural analysis
  • Experience with testing methodologies for composite panels
NEXT STEPS
  • Research advanced composite material properties and their impact on stiffness
  • Learn about the finite element analysis (FEA) for composite structures
  • Explore the effects of orthotropic materials on deflection calculations
  • Investigate the ASTM standards for testing composite panels under load
USEFUL FOR

Structural engineers, materials scientists, and anyone involved in the design and testing of composite materials will benefit from this discussion.

har_rai
Messages
10
Reaction score
0
Hi:

Recentlly we tested a composite panel for uniform pressure load and tablulated the deflection at few location where we were intersted.But when I tried to use hand equations to calculate the stiffness/deflection and I got totally diffefrent results for deflection.Actually deflections are more in hand eqations.

Now am I wondering which deflection to use to calculate stiffness.

If I use from hand results, stiffness (total load from pressure /deflection)is not acceptable because sfiffness is small than required.

Can anyone tell what I am missing?

Thanks in adwanse.
 
Engineering news on Phys.org
How did you come up with your values of stiffness and so? Was thinking whether the theoretical background you utilized is able to take account the properties of your panel, in case it's a more complex lamina/laminate (several layers which are orthotropic for example).
 

Similar threads

Cantilever beam deflection with point mass and point load at the end
  • · Replies 3 ·
Replies
3
Views
3K
Stiffened panel - moments of inertia
  • · Replies 4 ·
Replies
4
Views
3K
Simply supported beam with a spring support in the middle - deflection
  • · Replies 6 ·
Replies
6
Views
4K
Max Deflection Hand Calculations: Find 1.734in Plate Bending
  • · Replies 1 ·
Replies
1
Views
2K
What is the best beam design for my aluminum tandem axle trailer?
  • · Replies 33 ·
2
Replies
33
Views
6K
Cantilevered OSB Bending in the Wind
  • · Replies 2 ·
Replies
2
Views
2K
What Size Aluminum Angle for 200-Pound Load on Attic Hoist?
  • · Replies 6 ·
Replies
6
Views
5K
Mechanical Testing Options for Sandwich Panels
  • · Replies 1 ·
Replies
1
Views
2K
Engineering Need help in solving SDOF cantilever
  • · Replies 1 ·
Replies
1
Views
2K
Calculating Deflections of I-Beams with Varying Loads and Supports
  • · Replies 5 ·
Replies
5
Views
3K