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James A. Sherwood Patrick J. Drane SGMA Meeting 04 October 2003

Introduction. Effect of Use on Aluminum Baseball Bat PerformanceMachine testingField hitting. Outline. BackgroundTest MethodologiesAnalysis MethodologiesEffect of Use ResultsConclusionsRecommendations. Outline. BackgroundTest MethodologiesAnalysis MethodologiesEffect of Use ResultsConclusionsRecommendations.

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James A. Sherwood Patrick J. Drane SGMA Meeting 04 October 2003

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    1. James A. Sherwood Patrick J. Drane SGMA Meeting 04 October 2003 Introduce myself Welcome Everyone Mention Title of Thesis Introduce myself Welcome Everyone Mention Title of Thesis

    2. Introduction Effect of Use on Aluminum Baseball Bat Performance Machine testing Field hitting Identify the 2 topicsIdentify the 2 topics

    3. Outline Background Test Methodologies Analysis Methodologies Effect of Use Results Conclusions Recommendations Go through outlineGo through outline

    4. Outline Background Test Methodologies Analysis Methodologies Effect of Use Results Conclusions Recommendations “Within the Background section I will discuss...”“Within the Background section I will discuss...”

    5. Motivation for Research Maintaining the integrity of collegiate baseball Increased interest in what drives changes in performance

    6. Effect of Use Aluminum bats can be used for a long period of time Aluminum bats are certified for the NCAA with a performance limit Concern: An increase in performance resulting from use of a bat could cause certified bat to exceed limit

    7. UMLBRC Established in 1998 Research testing for MLB Official certification center for all bats used in NCAA and high school baseball

    8. BRC Capabilities Baum Hitting Machine

    10. UMLBRC Capabilities 3-Pt Bend Testing Modal Testing

    11. Workhardening Theory Increase of Yield Strength Plastic deformation causes changes in the microstructure that leads to hardening

    12. C405 tensile test

    13. Terminology Bat Performance Sweet Spot Certification Cycle The Bat

    15. Effect of Use – Test Method Performance Testing in the Hitting Machine All-in-Machine / Field Use with Testing NCAA certification testing procedure Same 5 locations impacted each time Use of official NCAA baseballs Complete after significant cracking or denting

    17. BESR

    19. Effect of Use Test Bats

    20. PD01

    21. PD01

    22. PD01

    23. PD01

    25. Confidence Intervals Statistical tool for evaluating magnitude of confidence in test average Helps to predicts likelihood of samples being from the same population 95% Confidence used

    29. PD01

    30. PD01

    31. PD01

    32. PD02

    33. PD02

    34. PD03

    35. PD03

    36. PD03

    37. PD03

    38. PD03

    39. PD03

    40. PD04

    41. PD04

    42. PD04

    43. PD04

    44. PD05

    45. PD05

    46. PD05

    47. Effect of Use Results Summary

    49. Conclusion The result of using an aluminum baseball bat may lead to a slight increase in batted-ball performance Increase is probably a result of softening of the aluminum – due to increased contact time

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