This course gives an overview of fracture and deformation of engineering materials including metals, polymers, ceramics and their composites. It is necessary for the students to understand mechanical responses of materials in general and also to know a special phenomenon of each material relating to the mechanism. Different two viewpoints of generalization and analysis are very strong way to estimate the mechanical reliability of materials used in the real world, and also brings the students touch of learning in their lifes.
By the end of this course, students will be able to
1) grasp general feature of mechanical response of materials including metals, polymers, ceramics, and their composites
2) understand the strengthening and toughening mechanisms of the materials
3) think from the standpoint of fracture mechanics
4) analyze the strength distribution data to estimate strength reliability
Elasticity, Metals Dislocation, Strengthening mechanisms of metals, Polymers, visco-elasticity, Stress relaxation, Creep, Internal friction, Ceramics, Composites, Fracture mechanics, Stress intensity factor, Energy release rate, Fracture toughness, Process zone, Toughening mechanisms of ceramics, Fracture statistics, Weibull distribution, Thermal stress, Thermal shock fracture
|Intercultural skills||Communication skills||Specialist skills||Critical thinking skills||Practical and/or problem-solving skills|
The students are required to download learning materials in every class and read it before coming to class.
The instructor explains important points in each class.
The instructor poses questions for debate.
Students designated by the instructor will express their ideas to the question.
The instructor will summarize the discussion.
|Course schedule||Required learning|
|Class 1||Elasticity, Elastic stiffness tensor, Energy elasticity, Entropy elasticity||Explain elastic stiffness tensor.|
|Class 2||Dislocation theory in metals, Edge dislocation, Screw dislocation, Mixed dislocation, Glide motion, Climb motion, Fracnk-Reed source||Explain structure and motion of dislocations.|
|Class 3||Grain boundary of metals, Tilt boundary, Twist Boundary, Coincidence site lattice, Overview on metals||Explain grain boundaries in metals|
|Class 4||Strengthening mechanisms of metals, Work hardening, Solid solution strengthening, Precipitation strengthening, Dispersion strengthening, Fiber reinforcement, Composite materials||Explain strengthening mechanisms of metals|
|Class 5||Visco-elasticity, Maxwell model, Voigt model, Stress relaxation, Creep. Integral law||Explain visco-elasticity in polymers|
|Class 6||Anelasticity, Internal friction Overview on polymers||Explain anelasticity and internal friction|
|Class 7||Overview on ceramics, Al2O3, ZrO2, Si3N4, SiC, C/C composites||Explain typical ceramics|
|Class 8||Al2O3, Powder compaction process||Explain alumina ceramics and powder compaction process|
|Class 9||Si3N4, Sintering process||Explain silicon nitride ceramics and sintering process|
|Class 10||Fracture mechanics, Stress intensity factor, Critical stress intensity factor, Strength and flaw size, Process zone||Explain fracture based on stress intensity factor|
|Class 11||Fracture mechanics, Energy release rate, Critical energy release rate, Relation between KIC and GIC||Explain fracture based on energy release rate|
|Class 12||Toughening mechanisms in ceramics, Elastic inhomogeneity, Thermal expansion inhomogeneity, Crack bowing, Crack deflection||Explain the basic toughening mechanisms in ceramics|
|Class 13||Toughening mechanisms in ceramics, Stress-induced phase transformation toughening, Microsrack Toughening, Elastic bridging, Fiber pullout||Explain the special toughening mechanisms in ceramics|
|Class 14||Fracture statistics, Weibull distribution, Weakest flaw, Weakest link theory, Weibull plot, Most likelihood method||Explain fracture statistics|
|Class 15||Thermal stress, Thermal shock fracture, Stationary thermal stress, Non-stationary thermal stress, Un-coupled quasi-static theory, Thermal shock fracture theory||Explain thermal stress and thermal shock|
Teaching materials are distributed in OCW-i
Hertzberg, Deformation and Fracture Mechanics of Engineering Materials, 4th ed. Wiley
Students will be assessed on their understanding of fracture and deformation of engineering materials, and their ability to apply them to estimate and discuss mechanical reliability.
Students’ course scores are based on several reports (100%)
Taking the related classes is recommended, not mandatory.
Contact by e-mail in advance to schedule an appointment
The classes are served for students to use their brains and polish their intelligence.