Static and Dynamic Response of a Sandsich Structure under Axial Compression






Static and Dynamic Response of a Sandwich

Structure Under Axial Compression

by

Wooseok Ji

A dissertation submitted in partial ful¯llment

of the requirements for the degree of

Doctor of Philosophy

(Aerospace Engineering)

in The University of Michigan

2008

Doctoral Committee:

Professor Anthony M. Waas, Chair

Professor Alan Wineman

Assistant Professor Veera Sundararaghavan

Professor Zden·ek Ba·zant, Northwestern University



LIST OF TABLES

2.1 Material properties of the lamina in the face sheets

2.2 Material properties of the core material

2.3 Geometric and material parameters used in Fig. 2.10 (moduli unit: GPa)

3.1 Summary of the formulations for each case

3.2 Material properties of the lamina in the face sheets

3.3 Material properties of the core material from the experiment of Fagerberg

4.1 Properties of various beam materials

5.1 Failure loads of the sandwich specimens with the 12.5 mm thick core from uniaxial

end compression tests

5.2 Failure loads of the sandwich specimens with the 25 mm thick core from uniaxial

end compression tests

6.1 Summary of the impact tests


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