Engineering Mechanics - Statics

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SUMMARY

The discussion centers on the concept of mobility in engineering mechanics, specifically in statics. Mobility is defined as the number of independent parameters required to specify the position of all links in a mechanism, as per Cleghorn (2005). A negative value for mobility is not possible and typically indicates an error in defining the degrees of freedom of the links. The conversation also touches on the treatment of distributed loads in mechanics, highlighting the complexity of statics compared to dynamics.

PREREQUISITES
  • Understanding of mobility in mechanical systems
  • Familiarity with degrees of freedom in mechanisms
  • Knowledge of statics and dynamics in engineering mechanics
  • Ability to interpret mechanical diagrams and load distributions
NEXT STEPS
  • Research the concept of degrees of freedom in mechanical systems
  • Study the methods for analyzing distributed loads in statics
  • Explore Cleghorn's definitions and principles in engineering mechanics
  • Learn about the graphical methods for solving mobility issues in mechanisms
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Engineering students, mechanical engineers, and professionals involved in the analysis and design of mechanical systems will benefit from this discussion.

pesisa
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Can one obtain a negative value for mobility i when working out the mobility of a structure; the structure being constrained by either pins, sliders or fixed points? What happens with a negative mobility?
 
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you cannot have negative mobility.

Mobility is defined as "the number of independent parameters required to specify the position of all links of the mechanism." -Cleghorn 2005

These parameters are typically angles of links and distances of the base joints. If you are getting negative values for mobility it may be because the degree of freedoms of the links are incorrectly define.

If you can supply a diagram of the mechanism I would be glad to help.
 
That helped me out a bit, but we already moved on onto other subjects now and I hope I passed the exam already. If not, I shall have to do a resit :( .. I can't understand why I found statics to be difficult and Mechanics to be much more simple, since the latter builds on the former.
I do have another question but I'm not sure I'm in the right place.
How do I treat distributed loads in Mechanics ?
 

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