Strength of Material and Structure
TeachersHASHIMOTO, KeizoStaffInfo
Grade, SemesterYear 1 2nd semest [Master's program, Division of Integrated Science and Engineering]
CategorySpecial Subjects
Elective, CreditsElective 2credit
 Syllabus Number

Course Description

This lecture presents the relationships between the mechanical properties of materials and their structures that are utilized in jet engines and airplanes. Strengthening mechanisms of materials are understood systematically, based on the lattice defects such as vacancies, dislocations, stacking faults, grain boundaries, solute atoms, interstitial atoms and precipitates. Fracture and creep behavior and fatigue of metallic materials are also discussed. An overview of the effects of lattice defects on the mechanical properties of materials will be looked at. Observations of fractured specimens using the scanning electron microscope will be trained.

Course Objectives

Effects of microstructures on the mechanical properties of materials such as plastic deformation have been discussed. Strengthening mechanism of materials are studied systematically, based on the dislocation theory. The role of lattice defects such as vacancies, dislocations, stacking faults, grain boundaries, solute atoms, interstitial atoms, and precipitates will be discussed in detail using DVD program in University of Pennsylvania. Student will be able to discuss with experts in this field.

Grading Policy

submission of assignments(50%) and final report(50%)

Textbook and Reference

KindTitleAuthorPublisher
TextbookIntroduction to Engineering Materials (DVD)

C.J. McMahonUniversity of Pennsylvania
ReferencesStrength of MaterialsM. Kato, S. Kumai, S. OnakaAsakura Publishing Co (1999)ISBN978-4-254-23693-4

Requirements(Assignments)

This course is related with the strength and mechanical properties of materials in undergraduate course. Answer the questions in each chapter and report them. Group discussions are recommended.

Note

Schedule

1Materials for jet engine: mechanism and structure
2Mechanical Properties 1; Definition of stress and strain
3Mechanical Properties 2; Elastic deformation, Hookes law
4Mechanical Properties 3; Plastic deformation Yielding and Schmid factor
5Mechanical Properties 4; Large scale deformation, necking, fracture
6Dislocation and Plastic Deformation 1; Slip
7Dislocation and Plastic Deformation 2; Definition of dislocation
8Dislocation and Plastic Deformation 3; Observations of dislocation using TEM
9Dislocation and Plastic Deformation 4; Plastic deformation of crystal
10Dislocation and Plastic Deformation 5; Stress field of screw dislocation
11Dislocation and Plastic Deformation 6; Stress field of edge dislocation and Interaction of parallel dislocations, strain energy
12Exercise 1; Tensile test of ss400 steel specimen.
13Exercise 2; Instruction of scanning electron microscopy (SEM)
14Exercise 3; Scanning microscope observations of fracture surface of the tensile tested specimen
15Exercise 4; Scanning microscope observations of fracture surface and Discussion