Date of Award


Document Type


Degree Name

Master of Science (MS)


Aerospace, Physics, and Space Sciences

First Advisor

David Fleming

Second Advisor

Razvan Rusovici

Third Advisor

Vladislav Bukshtynov


The purpose of this work is to explore the stress-based topology optimization of structure that utilizes laminated composites and 3D woven Pi preform joints. Simple geometry, loading, and boundary conditions are considered. At a finite element level, an aggregate stress ratio is developed for Pi joint and acreage laminate elements. A basic descent method of moving asymptotes (BDMMA) algorithm is created to solve all optimization problems. Topology results for two different stress-based formulations and a compliance minimization problem are compared, followed by an in-depth analysis at a Pi joint and laminate level.