Energy needed to deform metal sheets

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Discussion Overview

The discussion revolves around the calculations and methodologies for determining the energy required to deform metal sheets, specifically focusing on reaching plastic deformation and the conditions leading to breakthrough. Participants explore various resources, concepts, and variables involved in the deformation process.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant seeks information on calculating the force needed for plastic deformation of metal sheets and requests suggestions for resources.
  • Another participant provides a link to a search for "tool and die design," indicating a potential resource for further information.
  • A different participant mentions searching for information specifically on energy deformation of metal sheets.
  • There is a suggestion that the term "deflection" may be relevant to the discussion, prompting a request for comments on this terminology.
  • A participant recommends two books on metal forming, highlighting their relevance to the topic and suggesting "sheet metal forming" as a useful search term.
  • One participant expresses a need to calculate the energy required to dent a metal sheet to the point of breakthrough, noting that the level of detail is not crucial for their current model.
  • Another participant emphasizes the significant differences between minor denting and breakthrough, suggesting that practical tests may be necessary due to the many variables affecting dent resistance.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best approach to calculating the energy needed for deformation, with multiple competing views and suggestions for resources and methodologies remaining unresolved.

Contextual Notes

Participants mention various factors that influence dent resistance, including sheet thickness, strength, toughness, and the characteristics of the impacting object, indicating a complex interplay of variables that may not be fully accounted for in theoretical models.

liquidFuzz
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I'm doing some calculations on deforming of metal sheets. I have a formula for calculating the force needed to bend metal sheets. Does anyone have suggestions on where I can find more information? What I would like to end up with a way of calculating the force needed to deform metal sheets such that they reach plastic deformation.

Thanks!
 
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I've been 'googling' too but more in the line of energy deformation metal sheets.
 
It seems that the term deflection is used for this. Any comment on this maybe?
 
How deep do you want to get? The book Metal Forming - Mechanics and Metallurgy by Hosford and Caddell, was the basis for a graduate level class on that subject. Another book, Manufacturing Processes for Engineering Materials by Kalpackjian, has a chapter on sheet metal forming that is much more readable.

Good search term is sheet metal forming on both Google and scholar.google.com.
 
I'm looking for a way of calculating the energy needed to deform a metal sheet, like denting a metal sheet to the point of breakthrough. In an attempt to try and answer your question about how deep I want to go - I have a some rough estimations in my current model so the level of detail for the denting energy isn't crucial.
 
There is a huge difference between barely denting, as implied in your first post, and denting to the point of breakthrough. It sounds like you are better off running some tests. There many variables - sheet thickness, strength, toughness, size, edge support, kinetic energy, momentum, shape, and strength of the object all affect the dent resistance. Support a piece of sheet metal, drop objects from different heights, find what dents and how deep.
 

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