PA4012 Fracture Mechanism and Analysis in Polymers Syllabus:
PA4012 Fracture Mechanism and Analysis in Polymers Syllabus – Anna University PG Syllabus Regulation 2021
OBJECTIVES:
To impart knowledge on mechanics of cracked components of different modes by which these components fail under static load conditions.
To identify the role of deformation of materials in fracture.
To understand about crack growth curve
To evaluate various crack arrest mechanisms.
To evaluate various applications of fracture mechanics
UNIT I ELEMENTS OF SOLID MECHANICS
The geometry of stress and strain, elastic deformation, plastic and elasto-plastic deformation – limit analysis–Airy’s function – field equation for stress intensity factor.
UNIT II STATIONARY CRACK UNDER STATIC LOADING
Two dimensional elastic fields–Analytical solutions yielding near a crack front–Irwin’s approximation – plastic zone size–Dugdaale model–determination of J integral and its relation to crack opening displacement.
UNIT III ENERGY BALANCE AND CRACK GROWTH
Griffith analysis–stable and unstable crack growth–Dynamic energy balance–crack arrest mechanism– K1c test methods – R curves – determination of collapse load.
UNIT IV FATIGUE CRACK GROWTH CURVE
Empirical relation describing crack growth law–life calculations for a given load amplitude – effects of changing the load spectrum–rain flow method– external factors affecting the K1c values.- leak before break analysis.
UNIT V APPLICATIONS OF FRACTURE MECHANICS
Crack Initiation under large scale yielding – thickness as a design parameter – mixed mode fractures – crack instability in thermal and residual stress fields – numerical methods.
TOTAL: 45 PERIODS
OUTCOMES:
At the end of the course, students will be able to
Familiarize with the design of components that contain cracks under static load conditions
Understand cracking under various loading conditions.
Acquire knowledge about energy balance in crack growth.
Conduct various analysis on crack growth
Acquire knowledge of applications of fracture mechanics
REFERENCES:
1. David Broek,”Elementary Engineering Fracture Mechanics “, Fifth off and Noerdhoff International Publisher, 1978.
2. John M. Barson and Stanely T. Rolfe Fatigue and fracture control in structures Prentice hall Inc. Englewood cliffs. 1977.
3. Kare Hellan, “Introduction of Fracture Mechanics”, McGraw-Hill Book Company, 1985.
4. Preshant Kumar, “Elements of Fracture Mechanics”, Wheeler Publishing, 1999. Tribikram Kundu, “Fundamentals of Fracture Mechanics”, Ane Books Pvt. Ltd. New Delhi/ CRC Press, 1st Indian Reprint, 2012.