Application of DIC in Solid Mechanics

Bhise, V S (2013) Application of DIC in Solid Mechanics. Masters thesis, Indian Institute of Technology Hyderabad.

Preview

Text
ME11M1003.pdf - Submitted Version
Download (5MB)

Abstract

During service life, composite structures are susceptible to damage which reduces their structural integrity. For improved service life, the damage needs to be repaired. In case of low velocity impact damage adhesively bonded patch repair has shown to be cost effective and most efficient in extending service life of damaged parts. The repair performance is mainly influenced by patch stacking sequence, patch shape, patch thickness, overlap length and adhesive strength. In the first phase of work, a 3D finite element based study is carried out using mechanics based approach to optimize the patch dimensions and stacking sequence so that the performance of repaired structure can be improved. Also, a genetic algorithm based approach in-conjunction with finite element analysis is implemented for arriving at an optimized patch and adhesive dimensions. Experimental study is then carried out with optimized geometry using non-contact optical based technique namely digital image correlation (DIC). The mechanics of double and single sided repair are discussed in detail and strain field from DIC have been compared with finite element (FE) estimates.

[error in script]

IITH Creators: