This website presents the fundamental principles of fracture mechanics, with many examples included. Lecture notes mechanics and materials ii mechanical. Course outline the course covers the basic aspects of engineering fracture mechanics. Basic notions of fracture mechanics ductile fracture. Som from iit kharagpur made available by nptel elearning initiative.
The lengths of the cracks are different in different bodies. Engineering fracture mechanics free video lectures. Nptel provides elearning through online web and video courses various streams. Both the mechanics and the materials sides of fracture should be studied in order to obtain a balanced, complete picture of the. The method of continuum mechanics is to view a solid as a continuous distribution of material particles. Using a diamond saw, you cut each body with a crack of length 2a.
To lay foundations for the me4 advanced forming and fracture course. Fracture mechanics provides a means for analytical predictions, but still experiments are paramount. This is the case for linear elastic fracture mechanics lefm. Video lectures tutorials lecture 1 introduction lecture 3 crystal geometry lecture 17 phase diagrams lecture 6 crystal structure lecture 2 internal energy enthalpy lecture 9 structure of solid materials lecture 4 crystal geometry lecture 11 polymers contd. Selected topics in dynamic fracture will also be covered. We now carry out a linear elastic stress analysis of the cracked body, which will allow us to formulate critical conditions for the 16 growth of flaws more precisely. Ramesh, department of applied mechanics, iit madras. The starting point of a fracture mechanics analysis therefore is a structure with a preexisting crack or flaw. Mechanical engineering engineering fracture mechanics see other formats 1 engineering fracture mechanics by prof. Nptel provides courseware in the form of video lectures and web courses. Advanced topics that will be covered include elastic plastic fracture mechanics, ad hoc damage and failure models, cohesive zone models, phasefield model, and numerical methods. A fracture is described as ductile or brittle depending on the amount of deformation i.
Fracture mechanics fracture mechanics is a branch of mechanics that is concerned with the study of the propagation of cracks and growth of flaws. It covers both linear lefm and nonlinear fracture mechanics, including jintegrals, as well as fatigue crack growth concepts and mechanisms. Lecture 32 fracture lecture 27 mechanical behaviour of materials. He has also developed innovative tools for teaching various courses that include software such as pscopetm and analysis package for processing. Introduction to fracture mechanics david roylance department of materials science and engineering massachusetts institute of technology cambridge, ma 029 june 14, 2001. This book develops the basic elements needed for both fracture research and engineering practice. Introduction to fracture mechanics david roylance department of materials science and engineering massachusetts institute of technology cambridge, ma 029. Aj kinloch and rj young, fracture behavious of polymers.
Prediction of crack growth can be based on an energy balance. Lecture notes fracture and fatigue materials science. Spectacular failures that triggered the birth of fracture mechanics, modes of loading, classification as lefm and epfm, crack growth and fracture mechanisms, energy release rate, resistance, griffith theory of fracture, extension of griffith theory by irwin and orowan, rcurve, popin phenomena, crack branching. This text is prepared for a series of lectures on fracture mechanics. Conventional fracture mechanics is mainly based on the theory of elasticity and it is used for studying the stability and propagation of existing cracks. Nptel, iit, lectures, courses, video, engineering, online.
You can also get course completion certification for some of the courses. Most of these courses consists 40 videos and 1 hour duration each. Mechanics and materials lecture notes download book. Apr 03, 2012 engineering fracture mechanics by prof. Four lectures on elastic fracture mechanics these four lectures were prepared during my sabbatical visit to espci paris tech during the months of november 20 to march 2014. Engineering fracture mechanics online course video lectures. The emphasis is on continuum mechanics models for energy flows and cracktip stress and deformation fields in elastic and elasticplastic materials. Nptel mechanical engineering engineering fracture mechanics.
Engineeringfracture mechanics rameshdepartment appliedmechanics, iit madras. Objectives the objective of this section is to understand in detail the use of fracture mechanics for welded structures. Click on any video lecture link to view and download that video. For the love of physics walter lewin may 16, 2011 duration. Fracture failure mechanism stress concentration factor for a crack is extremely high, so plastic zone is created at tip the key is stability of crack which is a function of.
The preceding analysis considered fracture from an energy standpoint. So, if you start with fracture mechanics, keep going and study up on the physical aspects of fracture across a broad class of materials and read some fracture case studies 1 to see how all this gets put into. Find materials for this course in the pages linked along the left. Spectacular failures fracturemechanics, modes loading,classification epfm,crack growth fracturemechanisms, energy release rate, resistance, griffith theory fracture,extension griffiththeory orowan,rcurve, popin phenomena, crack branching.
Nov 30, 2010 nptel provides courseware in the form of video lectures and web courses. The modern form of application of fracture mechanics to concrete, which was first developed in lund, differs from the conventional fracture mechanics in both these respects. Lecture notes fracture and fatigue materials science and. Use nptel mechanical engineering app to understand your subjects better using video lectures and pdfs and make your concept stronger. Central questions in fracture mechanics are for example. Scope teaching hours 4 the scope of theory covered is. Dynamic behavior of materials and structures fracture mechanics fracture mechanics is a branch of mechanics that is concerned with the study of the propagation of cracks and growth of flaws. Using nptel mechanical engineering mech app you can read text content pdf of all videos which helps you to save mobile data. Nptel syllabus advanced marine structures video course course outline the course will give a brief overview of ultimate load design principles and plastic capacity of sections capacity estimate of tubular joints under axial, flexural and torsional buckling will be discussed.
Physical metallurgy fracture mechanics lecture 2 fracture of a steel. The focus of these lectures is on certain fundamental aspects of elastic. During this time i was supported by michelin corporation, by espci and by total corporation. Pdf on jan 1, 2018, alaa abdulhasan atiyah and others published fracture mechanics lecture notes find, read and cite all the research you need on researchgate. The course covers the basic aspects of engineering fracture mechanics. Fracture mechanics fracture mechanics lecture notes course. Fracture mechanics fracture mechanics lecture notes. Nptel materials science nptel video lectures from iits and iisc. Feb 03, 2018 for the love of physics walter lewin may 16, 2011 duration. Inglis solution for an elliptical hole has brought out the severity of a crack. Tl anderson, fracture mechanics fundamentals and applications 3rd ed. Discrete time dynamics, local stability, cycle stability, hamiltonian dynamics, world in a mirror, qualitative dynamics, for pedestrians, qualitative dynamics, for cyclists, fixed points and how to get them, counting, transporting densities.
Failure involving instability can be particularly surprising fatigue is a failure mode that can be characterized experimentally without the need for fracture mechanics. Nptel materials science nptel video lectures from iits. Page 1 of 10 ductiletobrittle transition during world war ii when a number of welded transport ships, away from combat, suddenly split in half. Ramesh, department of mechanical engineering, iit madras. The modern form of application of fracture mechanics to concrete, which was first developed in lund, differs from the. Engineering fracture mechanics nptel online videos. View notes fracture mechanics from drm 1234 at cranfield university. Linear elastic fracture mechanics many structural failure modes are discovered by disasters examples. The main aim of the lectures is to provide amrl staff who are involved in aircraft fatigue and fracture research with a broad. Links for youtube playlists for fluid mechanics lectures. Physical metallurgy fracture mechanics lecture 1 in the next two lectures oct. Mechanics of fracture indian institute of technology.
Fundamentals of impact analysis and its application. Fluid mechanics video lectures nptel engineering video. A fracture is described as ductile or brittle depending on the amount of. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Search by nptel course id, course name, lecture title, coordinator.