GolfGist.com
Current Golf Research
Evaluation of the mechanical performance of golf shafts
Cheong, S.K. (Seoul National University of Technology, Department of
Mechanical Engineering); Kang, K.W.; Jeong, S.K.
Source: Engineering
Failure Analysis, v 13, n 3 SPEC. ISS., April, 2006, p 464-473
Abstract of the Article
Major mechanical properties of the golf shafts are
experimentally and numerically evaluated. Experimentally, the deflection
is measured by hanging a mass on the tip with the butt fixed. The degree
of torsion is measured by applying the twisting moment, 13.72 (kgf cm), to
the tip. The frequency of vibration is measured by adding a mass to the
tip of a shaft and shaking it. The position of the kick point, that is,
the maximum deflection point is measured by compressing the tip.
The
composite structure of a golf shaft made of fiber-reinforced plastics is
modeled and the mechanical performance of the structure is numerically
evaluated. Both a linear static and dynamic analysis for a golf shaft have
been performed. Comparing the present numerical results with experimental
data, the effects of major parameters on the performance of golf shafts
are also discussed. The finite element results for deflection, degree of
torsion, frequency of vibration, and position of kick point of golf club
shafts converge very rapidly. The present simulation gives satisfactory
results within a few percent of error compared with the experimental data.
The numerical results show that the major parameters of golf shafts are
strongly dependent on the material properties of fibers and design
pattern. The present results will be useful in designing sheet-rolled golf
shafts.
GolfGist.com Home