Mechanical Behavior of Aerospace Materials

This course serves as an overview for materials behavior for students without a materials background, including seniors and entry-level graduate students. Materials are at the foundation for all of engineering, as evident by the latest products that we design, to the airplanes that we fly, to the latest smart phones. In fact breakthroughs with material research are often accompanied by rapid advancements in technology. Thus it is paramount for all engineers to have an understanding of the structure and behavior of materials. In this class, we focus on the structure of materials, the microstructure connection to mechanical properties, and ultimately failure mechanisms. Materials play an important role in both design and manufacturing, which will be addressed in the context of components and extreme environments. Of specific interest will be defects within materials, defect formation/evolution, and their role in strengthening mechanisms. Material anisotropy, micromechanisms, and elasto-plastic properties at the atomic, singlecrystal/ constituent, and polycrystal/material levels and their use in explaining the deformation and failure characteristics in metals, polymers, and ceramics; failure mechanisms and toughening in composites; structure and behavior of aerospace materials: metal alloys, ceramic-matrix composites, and fiber-reinforced polymer composites. Particular topics will also include: elastic deformation, dislocation mechanics, plastic deformation and strengthening mechanisms, creep, and failure mechanisms; design criteria; special topics. We will attempt to have minimal overlap with AAE 554 Fatigue of Structures and Materials, therefore we will not cover fracture, fatigue, or stress concentrators.

AAE54800

Credit Hours:

3

Learning Objective:

Please refer to syllabus

Description:

This course serves as an overview for materials behavior for students without a materials background, including seniors and entry-level graduate students. Materials are at the foundation for all of engineering, as evident by the latest products that we design, to the airplanes that we fly, to the latest smart phones. In fact breakthroughs with material research are often accompanied by rapid advancements in technology. Thus it is paramount for all engineers to have an understanding of the structure and behavior of materials.
In this class, we focus on the structure of materials, the microstructure connection to mechanical properties, and ultimately failure mechanisms. Materials play an important role in both design and manufacturing, which will be addressed in the context of components and extreme environments. Of specific interest will be defects within materials, defect formation/evolution, and their role in strengthening mechanisms.
Material anisotropy, micromechanisms, and elasto-plastic properties at the atomic, single-crystal/ constituent, and polycrystal/material levels and their use in explaining the deformation and failure characteristics in metals, polymers, and ceramics; failure mechanisms and toughening in composites; structure and behavior of aerospace materials: metal alloys, ceramic-matrix composites, and fiber-reinforced polymer composites. Particular topics will also include: elastic deformation, dislocation mechanics, plastic deformation and strengthening mechanisms, creep, and failure mechanisms; design criteria; special topics. We will attempt to have minimal overlap with AAE 554 Fatigue of Structures and Materials, therefore we will not cover fracture, fatigue, or stress concentrators.

Topics Covered:

  • Indicial Notation
  • Crystallography
  • Elasticity
  • Stress-Strain Relationships and Yielding
  • Dislocation Mechanics
  • Partial Dislocations and Stacking Faults
  • Crystallographic Slip
  • Twinning and Shape Memory Effects
  • Strengthening Mechanisms
  • Creep
  • Two Bar Problems and Residual Stress
  • Ceramics, Probability of Failure, and Statistical Variations
  • Polymer Structure, Deformation, Fracture, and Viscoelasticity
  • Composites

Prerequisites:

Basic undergraduate knowledge of strength and materials. No prior knowledge of materials science is required.

Applied / Theory:

50/50

Homework:

Assigned weekly (given on Brightspace). There will be approximately 9 homework assignments throughout this course.

Projects:

TBD

Exams:

There will be two midterm exams throughout the semester. The exams will be accumulative. The material on the exam will be closely related to the lectures and types of questions asked on the homework.

Textbooks:

Mechanical Behaviour of Engineering Materials: Metals, Ceramics, Polymers, and Composites, Roseler, Joachim, Harders, Harald, Baeker, Martin; Springer, 2007; ISBN 978-3-540-73446-8
Other Requirements:
Matlab and MS Office

Instructor(s)

Michael Sangid

Email
msangid@purdue.edu