What is the Energy Absorbed in a Charpy Test with a 50-Degree Initial Angle?

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SUMMARY

The energy absorbed in a Charpy test using a 60-lb, 31.5-inch pendulum released from a 50-degree angle can be calculated by analyzing the difference in potential energy before and after impact. The pendulum rises to a 20-degree angle post-impact, indicating energy loss due to the impact with the test bar. This energy loss is quantified by the formula for gravitational potential energy, which is essential for determining the absorbed energy during the test.

PREREQUISITES
  • Understanding of gravitational potential energy calculations
  • Familiarity with the Charpy impact test methodology
  • Knowledge of pendulum mechanics and energy conservation principles
  • Basic trigonometry for angle measurements
NEXT STEPS
  • Study the principles of the Charpy impact test and its significance in material science
  • Learn how to calculate gravitational potential energy using the formula PE = mgh
  • Explore the mechanics of pendulum motion and energy transfer during impacts
  • Investigate factors affecting energy absorption in impact tests, such as material properties
USEFUL FOR

Students in mechanical engineering, materials science researchers, and professionals involved in material testing and analysis will benefit from this discussion.

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Homework Statement



What would be the energy absorbed if a 60-lb, 31.5-in pendelum was released from an angle of 50 degrees hit a test bar, then rose to an angle of 20 degrees after impact?

This is done using a charpy test

Homework Equations



Not sure where to begin


The Attempt at a Solution



Not sure where to begin
 
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Why do you suppose the pendulum only has a 20 degree rise after the impact, when the initial angle was 50 degrees? What's different?
 

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