Finite Element Analysis of Laminated Composite Structures - Engineering Assignment Help

Assignment Task :

Learning Outcomes
The following module learning outcomes and professional body learning outcomes are tested in this assessment:

• Analyse engineering structures using finite element methods
• Evaluate stresses and deflections in engineering structures under complex loading.
• Analyse post failure behaviour of engineering structures. 

1. Description

Laminated composite panels have been widely used in engineering applications due to their excellent high strength-to-weight ratio, modulus-to-weight ratio, and the controllability of the structural properties with the variation of fibre orientation and the lamina number. However, in such applications, the structures are susceptible to buckling as usually the thickness of composite laminates being significantly smaller than the width and length of the panels. Buckling is a very dangerous phenomenon related to thin-walled structures because it can appear well before the developed stresses in a structural member reach the compressive yield strength of the respective member. A rectangular plate of dimensions ba× (i.e. length × width) under a uniaxial compressive load is shown in Figure 1.

2. Aims The aims of the present assignment are: 

• To be able to calculate the theoretical critical buckling load of a laminated composite plate ? To become familiar with the analysis of a laminated composite plate using ANSYS finite element software.

3. Deliverables
Part 1: 
a) What is buckling and why is it important in engineering?
b) What is a ‘Degree of Freedom’?
c) What is a “mesh independent result”?
d) How can the critical buckling load of a plate be computed using a “FEA -eigenvalue analysis”?
e) How can the critical buckling load of a plate be computed using a “FEA - nonlinear analysis”?
f) What is a laminated composite plate?
g) What are the main assumptions for the Classical Laminated Plate Theory (CLPT)?
h) What are the main assumptions for the first-order shear deformation theory (FSDT)?
i) How can the results from the FE analysis of a laminated composite plate be validated?

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