Calculating Force Needed to Break Objects with a Maul

  • Context: High School 
  • Thread starter Thread starter Cemelion
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    Break Force
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Discussion Overview

The discussion revolves around calculating the force needed to break objects using a maul, with a focus on the concepts of pressure, fatigue life, and material properties. Participants explore theoretical and practical aspects of force application and material failure over time.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about a formula to predict the force needed to break a maul and compares it to the force required to open a bottlecap.
  • Another participant suggests that there is no theoretical framework for predicting the breaking point, implying that empirical testing is necessary.
  • Some participants argue that while there is theoretical background, no general equation exists due to the complexity of factors involved, such as the nature of the force, frequency of application, and material properties.
  • A later reply discusses the complexity of material behavior under stress, using glass as an example to illustrate how materials can deform and fail over time.

Areas of Agreement / Disagreement

Participants express differing views on the existence of a theoretical framework for predicting breaking forces, with some asserting that empirical testing is the only solution while others point to the relevance of fatigue life theory. The discussion remains unresolved regarding a definitive approach to the problem.

Contextual Notes

Limitations include the lack of a general equation for predicting material failure and the dependence on specific material properties and conditions. The discussion highlights the complexity of material behavior under repeated stress.

Cemelion
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I was splitting some wood the other day with an old maul and the maul broke. I was wondering if anyone knows of a formula to predict or give a sum of the force needed over time to break said maul.

so what i really want to know is how many times can i hit something with 600lbs of pressure with a maul that breaks after 1200lbs of pressure or.. how many beers can i open with a force of .000001lbs with a bottlecap remove that breaks after 70lbs of pressure?
 
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Hahaha There were actually no theory for that problem.
The only way to find out is to do it until it get broken.
 


There is plenty of theory actually, but no general equation for it. It depends so heavily on the nature of the force, how often it occurs, the shape and material of the object and many other things. Look up fatigue life. That would be a good place to start.
 


kk, thanks guys... not a big deal just curious... i look into fatigue life
 


Way too complex for almost all materiels... ordinary glass for instance will deform over a long time due to pressure or gravity (old glass bottles you find in dumps are folded flat, old stained glass windows get thin at the top and thick at the bottom). Then, if you fracture glass, the speed of advancement of the crack can exceed 5000 feet per second, yet even what appears to be the motionless end of a static crack is really still continuing to advance very slowly as the molecular bonds maintain a minimum breaking rate (on the order of hundreds of bonds per hour for typical pane glass)... and that's just "simple" glass.
 

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