Deepak Polaki

ORCID Identifier(s)


Graduation Semester and Year




Document Type


Degree Name

Master of Science in Mechanical Engineering


Mechanical and Aerospace Engineering

First Advisor

Robert M Taylor


This is a design optimization study that focuses on the value of free size optimization technology on composite structures which incorporates realistic structural requirements and practical manufacturing limitations to achieve an iterative design with effective structural performance. To detail a study on such practical implementation, a sample structure is required. A rectangular composite laminate with a central hole cutout is considered for this study and is designed using finite elemental tools which includes compression, tension and shear loading conditions with load reactions at bolted joints and buckling stability. Free size optimization and size optimization are used in this study to design this laminate and compared with a conventional three zone laminate to estimate the structural integrity of the designs. Various design constraints are implemented that includes static strength, damage tolerance, structural stability, bearing-bypass criteria at bolted joints and manufacturing constraints in this study involves ply drop off effect and tow dimensional limits to reduce ply shape complexity, increase manufacturability and subsequently reducing manufacturing cost. Ply ramp rate effect and ply drop effect are studied by investigating the results with various values, ply dimensions and layout are simplified by implementing a set of rules that induce suitable dimensional limits.


Composite materials, Design optimization, Structural and manufacturing constraints, Free- size optimization, Size optimization


Aerospace Engineering | Engineering | Mechanical Engineering


Degree granted by The University of Texas at Arlington