Macro and micro deformations in a sandwich foam core

✍ Scribed by Sheng Chang; Dan Hong; Fu-Pen Chiang

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 533 KB
• Volume: 35
• Category: Article
• ISSN: 1359-8368
• DOI: 10.1016/j.compositesb.2003.11.011

✦ Synopsis

Most of the current theoretical and experimental investigations deal with macro/global response of sandwich materials. However, damages are often initiated microscopically. Thus it is necessary that one investigates the micro-mechanics as well as macro-mechanics damage mechanisms of such a material. Two digital random speckle techniques (one macro and one micro) are introduced to map the full field deformation surrounding a crack in the foam core of a sandwich beam. We find that at the macro-scale the deformation pattern is quite similar to that in a homogeneous and isotropic material. However at the micro-scale, the deformation pattern is quite complicated.