In this subject prof. C. Kassapoglou talks about calculation methods for failure modes of sandwich panels.
The effect of waviness on the difference between analytical and real results is then explained, as wel as examined why it is relatively difficult to use this to make better predictions. Finally the last two wrinkling modes are explained, shear wrinkling and wrinkling under combined loads.
The last section of the lecture covers shear crimping, similar to asymetric wrinkling, but with zero wavelength, folowed by design considerations for the rampdown of sandwich structures back to monolithic material. Finally an example of a sandwich structure under compression is discussed.