Analysis of baseball bats performance using field and non-destructive tests

R. W. Smith, T. H. Liu, T. Y. Shiang

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Currently the most common and excepted methods for testing bats are those approaches according to ASTM and NCAA. Both of these methods are done in a lab setting, in order to control the environment. The ASTM method measures Bat Performance Factors (BPF) of the bat, and the NCAA method measures Ball Exit Speed Ratios (BESR) of the bat. While these methods are proven effective, they neglect to take into account the actual envi ronment when the bat is used in the field. The purpose of this research is to draw a correla tion between BESR and BPF (bat performance factor) of three types of wood materials found in field tests, with values of a natural frequency and MOEd (dynamic modules of elasticity) found in the lab. By analyzing correlations between the field tests and non destructive testing (NDT), a new index can be drawn, which then can transform the natu ral frequency and MOEd results into BESR and BPF results. Research results show no sig nificant differences between the BESR and BPF when comparing the three types of wood materials. However there was a strong, positive correlation between the transverse natural frequency and the BESR and BPF of the bats. In other words, the higher frequency of the bat resulted in higher BESR and BPF values. In conclusion, the NDT method was proven to be effective both in the laboratory and in the field analysis. Future use of the NDT could be further used to create a new index to better analyze bat performances.

Original languageEnglish
Title of host publicationImpact of Technology on Sport II
Number of pages7
Publication statusPublished - 2008
Externally publishedYes
EventImpact of Technology on Sport II - Singapore, Singapore
Duration: 2007 Sept 12007 Sept 1

Publication series

NameImpact of Technology on Sport II


OtherImpact of Technology on Sport II

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation


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