Preview

failure theories

Good Essays
Open Document
Open Document
2806 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
failure theories
Design of Machine Elements, July - Nov 2013

Design of Machine Elements, July - Nov
2013
ME3350
Narasimhan Swaminathan: n.swaminathan@iitm.ac.in
Indian Institute of Technology Madras - Chennai 600 036

1/83

Design of Machine Elements, July - Nov 2013

Outline

2/83

Design of Machine Elements, July - Nov 2013
Failure of materials

Outline I
1

2

Failure of materials
Classification
Failure of Materials
Ductile materials
Von-mises criterion
Factor of safety in Von-mises criterion

3
4

Mohr and Mohr-Coulomb theory for Ductile materials
How to decide if material is ductile or brittle?
Brittle materials
Dowling factors to predict failure in brittle materials

5

6
7

Stress concentrations
Stress concentrations
Problem
solution
3/83

Design of Machine Elements, July - Nov 2013
Failure of materials

Outline II
8

Fatigue

9

Life

10

Stress-Life approach (High fatigue limits)
Corrections to fatigue strengths
Stress concentration in fatigue and notch sensitivity
Applying Stress concentration in Fatigue

11

Effects of mean stresses

12

Designing for high cycle fatigue with mean stress

13

Finding factor of safety with Good man diagrams
Multiaxial fatigue

14

Fracture mechanics

15

References
4/83

Design of Machine Elements, July - Nov 2013
Failure of materials
Classification

Classification Recap
Loads
1
2

Static loads
Dynamic loads - Fatigue

Geometry
1

Flawed materials - Static loads and Dynamic loads

Materials
1
2

Ductile
Brittle

5/83

Design of Machine Elements, July - Nov 2013
Failure of Materials

Outline I
1

2

Failure of materials
Classification
Failure of Materials
Ductile materials
Von-mises criterion
Factor of safety in Von-mises criterion

3
4

Mohr and Mohr-Coulomb theory for Ductile materials
How to decide if material is ductile or brittle?
Brittle materials
Dowling factors to predict failure in brittle
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Better Essays

    Steel 1045 Final Report
    • 1478 Words
    • 6 Pages

    Steel 1045 Final Report

    Out of the three materials tested, the steel 1045 exhibited the most elastic properties, with it being able to deform elastically for a greater amount of stress than for the other specimens, as indicated by its stress-strain curve as shown in figure 1, and further supported by it having the highest modulus of elasticity of all three specimens, as shown in table 2. The mild steel specimen had the second greatest modulus of elasticity, and the aluminium specimen had the lowest modulus of…

    • 1478 Words
    • 6 Pages
    Better Essays
    Read More
  • Satisfactory Essays

    The Broken Window Theory
    • 116 Words
    • 1 Page

    The Broken Window Theory

    The Broken Windows theory was first discussed in the late 1960s and has since been put in to use, greatly impacts the way that police and city-level political officials view crime and disorder Some believed that Broken windows was a success because it hit multiple facets of public policy. It provided a way for police to “do something” about disorder and crime. But, many academics in criminology and criminal justice, believe that the practice is fatally flawed and that its associated policing strategy does not reduce crime and can damage police and community relationships. However I believe it does work and can still work. As we grow thing need to change in order to keep…

    • 116 Words
    • 1 Page
    Satisfactory Essays
    Read More
  • Satisfactory Essays

    Ib 270 Research Paper
    • 723 Words
    • 3 Pages

    Ib 270 Research Paper

    Description: You will solve problems related to key concepts in engineering mechanics of materials covered over the semester.…

    • 723 Words
    • 3 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Four Failures That Matters
    • 608 Words
    • 2 Pages

    Four Failures That Matters

    Omission failures either due to process crash or either due to communication link failures detected via timeouts. However, in an asynchronous system a timeout is an indication only that a process is not responding. The process crashed or just slow down due to heavy processing load. As usually as a timeout, we pick a maximum period. The maximum period allows to account for either the network became congested and therefore slower on the response return/ the slower processing in the process and the…

    • 608 Words
    • 2 Pages
    Good Essays
    Read More
  • Best Essays

    Theories and Models
    • 754 Words
    • 3 Pages

    Theories and Models

    Morris, T. (2005). Behavior therapy. In M. Hersen, J. Rosqvist, A. Gross, R. Drabman, G. Sugai, & R. Horner (Eds.), Encyclopedia of behavior modification and cognitive behavior therapy: Volume 1: Adult clinical applications volume 2: Child clinical applications volume 3: Educational applications. (Vol. 2, pp. 699-705). Thousand Oaks, CA: SAGE Publications, Inc. doi: http://dx.doi.org.contentproxy.phoenix.edu/10.4135/9781412950534.n2013…

    • 754 Words
    • 3 Pages
    Best Essays
    Read More
  • Good Essays

    Broken Windows Theory
    • 329 Words
    • 2 Pages

    Broken Windows Theory

    Broken windows is a theory introduced in the 70’s and 80’s to examine the problem with rising criminal activity. The theory looks at areas in a city plagued with structures vandalized with graffiti, broken windows, unmaintained properties, and poor lighting (Swanson, 2017). The core of the theory is surrounded by physical and social dysfunction leading to the fear of crime thus leading community members to leave to other communities (Chappell, 2011).…

    • 329 Words
    • 2 Pages
    Good Essays
    Read More
  • Better Essays

    Cultivating Failure

    • 930 Words
    • 3 Pages

    Cultivating Failure

    desperate daily scrabbles to wrest suspense from dirt” (Flanagan 1). Through her use of a variety…

    • 930 Words
    • 3 Pages
    Better Essays
    Read More
  • Good Essays

    Broken Windows Theory
    • 1387 Words
    • 6 Pages

    Broken Windows Theory

    The topic I chose to research about is which police strategy/tactic is most effective in reducing crime and disorder. There are various forms of policing such as community-oriented policing, problem-oriented policing, hot spots policing, broken windows theory, and zero-tolerance policing. COP is a model of policing that stresses a two-way working relationship between the community and the police along with the police becoming more integrated into the local community, and citizens assuming an active role in crime control and prevention. POP is a concept created by Herman Goldstein in which he believes the police should take the categories of crime, order maintenance, and service and break them down into discrete problems and then develop specific…

    • 1387 Words
    • 6 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Flawed Responses To Failure
    • 219 Words
    • 1 Page

    Flawed Responses To Failure

    Managers at all levels of organizations, and at any stage of their careers, can fix their flawed responses to failure.…

    • 219 Words
    • 1 Page
    Satisfactory Essays
    Read More
  • Good Essays

    Broken Windows Theory
    • 631 Words
    • 3 Pages

    Broken Windows Theory

    The “broken windows” theory as explained in the article; which holds that physical detoriation and an increase in unrepaired buildings leads to increased concerns for personal safety of residents and a rise in the crime rates, is an applicable theory for the conditions in the inner cities. I believe it also can apply to the current conditions in some suburban areas that are degrading, such as the local town of Norristown where I grew up.…

    • 631 Words
    • 3 Pages
    Good Essays
    Read More
  • Powerful Essays

    Bad Leadership Theories
    • 1212 Words
    • 5 Pages

    Bad Leadership Theories

    When I think of bad or evil leadership, I think the power between leaders and followers are often locked in a complicated dance of sorts. Leadership today is a phenomenon, which implies that a leader, by nature, is someone wise and inspirational. However, it is better to understand that sometimes a leader is driven by darker forces, as well as their followers. Leadership can be painted in shades of gray, sometimes in black and bad leadership is as ubiquitous as it is insidious. This is not to say that bad leadership is more prevalent than good leadership, anymore than it could be said that bad people are greater in number than good people, but just as human nature is complex, leadership is prone to shades of gray and black as in white.…

    • 1212 Words
    • 5 Pages
    Powerful Essays
    Read More
  • Powerful Essays

    failure
    • 2645 Words
    • 11 Pages

    failure

    SYSTEM FAILURE CASE STUDIES SEPTEMBER 2009 VOLUME 3 ISSUE 06 A Half-Inch to Failure At 6:05 pm, on Wednesday, August 1, 2007, the Interstate-35 West (I-35W) bridge over the Mississippi River in Minneapolis collapsed. On the day of the collapse, four of the bridge’s eight lanes were closed for planned construction. Four weak connector plates fractured under the combined burden of rush hour traffic, concentrated construction equipment, and previous heavy renovations. The bridge fell 108 feet into the Mississippi River.…

    • 2645 Words
    • 11 Pages
    Powerful Essays
    Read More
  • Good Essays

    The Queer Art Of Failure Analysis
    • 741 Words
    • 3 Pages

    The Queer Art Of Failure Analysis

    Based on Judith Halberstam’s reading, The Queer Art of Failure and Homosexuality and Facism, we live in a predominantly binary world. There are usually only two options for most things. For example, girl or boy, yes or no, succeed or fail…etc. For example, Halberstam mentions at the beginning of the reading that we have winners and losers in this world. The, “...losers leave no records, while winners cannot stop talking about it, and so the record of failure is ‘a hidden history of pessimism in a culture of optimism’”. This seems as if there is only failure and success. As in, you either succeed, live a good life, and history remembers your success, or you fail and become excluded from history. Furthermore, history is often omitted or alternated…

    • 741 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Critical Analysis of Strategy For Learning From Failure
    • 456 Words
    • 2 Pages

    Critical Analysis of Strategy For Learning From Failure

    In Strategy For Learning From Failure, Amy C. Edmondson explain his strategy of how to get benefit from failure and be better. He presents this strategy in the form of a publication in which he shows his opinions about firms’ mistaken approach toward failure and how to fix that wrong. This paper will review Edmondson’s strategy as well as his main arguments, and will evaluate the quality of his writing and focus on weakness within the publication.…

    • 456 Words
    • 2 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Government Failures
    • 367 Words
    • 2 Pages

    Government Failures

    Collective choice exercised through government structures offers the possibility for correcting the perceived deficiencies of individual choice.…

    • 367 Words
    • 2 Pages
    Satisfactory Essays
    Read More

Related Topics