Analyse the cutting force of this bolt cutter

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Homework Help Overview

The discussion revolves around analyzing the cutting force of a bolt cutter, specifically focusing on the force generated in the small opening when a 250 N force is applied on both sides of the plier. Participants are exploring the mechanics involved in this force calculation.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants are attempting to determine the force in the small opening and have expressed difficulty in arriving at the correct answer. Questions about the completeness of the provided diagrams and the inclusion of necessary components, such as fulcrums, have been raised.

Discussion Status

The discussion is ongoing, with some participants providing guidance on the need for a free body diagram (FBD) and highlighting the importance of including all relevant fulcrums in the analysis. There is an acknowledgment of the initial calculations shared by the original poster, but no consensus has been reached on the correct approach yet.

Contextual Notes

Participants have noted that the original poster's diagram lacks essential components, such as the second fulcrum and additional pivots, which may affect the analysis of the cutting force. There is an emphasis on the need for clarity in the setup and assumptions made in the problem.

BiostudentWouter
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Homework Statement
force calculations
Relevant Equations
Determine the force created due to the compression of the plier
Schermafbeelding 2020-01-17 om 20.26.14.png

The question is to determine the force in the small opening, delivered from the 250 N on both sides of the plier.
i tried multiple things but can't get the answer right. Anyone that could help me?
This is my work so far:
IMG_4362.jpg
 
Last edited:
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Welcome to the PF. :smile:
BiostudentWouter said:
Homework Statement:: force calculations
Homework Equations:: Determine the force created due to the compression of the plier

View attachment 255743
The question is to determine the force in the small opening, delivered from the 250 N on both sides of the plier.
i tried multiple things but can't get the answer right. Anyone that could help me?
We cannot help you until you show your work so far. Please post your FBD and show your calculations that you have tried. Thanks.

EDIT -- it looks like you've gone back and posted your initial calculations. Thank you. :smile:
 
Last edited:
This would be an excellent place to employ the Principle of Virtual Work.
 
  • Informative
Likes   Reactions: berkeman
haruspex said:
Your diagram omits the second fulcrum, the one 70mm from the workpiece.
This is an essential part of the mechanism.

Yes, and there are two more pivots 230mm from the work that the force diagram appears to treat as rigid.
 

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