ES 240 Project - Stress Analysis of Bullet Holes on the Boeing 737 Fuselage
See Attached
See Attached
Professor Y. C. Fung, Professor Emeritus of Bioengineering at UC San Diego's Jacobs School of Engineering, is the recipient of the Fritz J. and Dolores H. Russ Prize of 2007.
The Russ Prize is presented biannually to an outstanding candidate in the field of bioengineering who has made significant contributions to improving the human condition through research, development, teaching, or management. The recipient receives a $500,000 cash award and an engraved gold medallion.
This is the last problem set this semester. It is due on Friday, Dec. 14, 2007.
See attachment for ES 240 lecture notes on plasticity.
Lei and I will be working on developing the appropriate relations and numerical methods for topological optimization of 2D ideal structures. In this constraint-based optimization study we will try to determine the density distribution which minimizes the strain energy for a fixed volume of material. This problem is a subset of the so-called "G-closure" problem in topological optimization where we have restricted our possible configurations to certain ideal geometries.
Andrew and I decided to work on some design topics.
Given a reference domain, some boundary conditions and a limited amount of material, which can not fill the whole domain, we want to determine the material distribution inside the domain so that the structure generated will contain the minimum elastic energy. This is called minimum compliance problem, a topic in the field of topology optimization.
Nathan Thielen and I will be investigating straight beams, bent beams and how the analysis can be applied to hooks. We did not have much time to investigate beams in ES240 this term so we hope to gain a broader understanding of this area and share our findings with the rest of the class. The primary goal is to compare the analysis necessary for straight beams versus the analysis needed for bent beams. We choose the project because we also will have ample opportunity to investigate bent beams and hooks using FEM.
Christian and I thought comparing the theory of bent beams to that of straight beams would be interesting because we only explored straight beams this semester in class. Bent beams are important since they are encountered regularly in practice, for example a hook. The geometry of a bent beam changes the equations governing the behavior. So, understanding how the geometry changes the beams behavior is our primary interest.
My project will be a literature study on ferroelasticity and how it applied to how of the topics we covered in class.
Eric Kiser