NUMERICAL ANALYSES ON MODAL SHAPE AND IMPACT PERFORMANCE OF COMPOSITE SOFTBALL BAT

Abstract

Abstract: Comparied with the traditional aluminium alloy softball bat and wooden softball bat, carbon fiber composite softball bat hare some major advantages, such as light in weight, high strength, high impact resistance, and high fatigue life. In this paper, ANSYS/LS-DYNA finite element software was used to establish a composite softball bat model. The experimental results^[6]could be predicted by the proposed numerical model with sufficient accuracy. Moreover, the proposed numerical model was used to simulate three common composite softball bats on modal shapes and softball rebound velocities. The results demonstrated that Demarini softball bat has smaller bending modal shape and hoop modal shape, which resulted in good working performance, and such softball bat also has better batting performance.

Key words: softball bat, composite, modal shape, rebound velocity

CLC Number:

TB332

XIE Xin, MAO Jia-jia, CHEN Ji-ye. NUMERICAL ANALYSES ON MODAL SHAPE AND IMPACT PERFORMANCE OF COMPOSITE SOFTBALL BAT[J]. Fiber Reinforced Plastics/Composites, 2018, 0(12): 47-52.

References

[1]杜善义. 先进复合材料与航天航空 [J]. 复合材料学报, 2007, 24(1): 1-14.
[2]Meltem A K, Hasan G. A review on machinability of carbon fiber re-inforced polymer (CFRP) and glass fiber reinforced polymer (GFRP) composite materials[J]. Defence Technology, 2018, 14: 318-326.
[3]Silberschmidt V V. Damage and fracture in composite materials and structures[M]. Woodhead Publishing, 2016.
[4]Daniel R. The sweet spot of a hollow baseball or softball bat[J]. The Journal of the Acoustical Society of America, 2004, 116(4): 2602.
[5]Mcdowell M. Assessment of softball bat safety performance using mid-compression polyurethane softballs[J]. Sports Biomechanics, 2004, 3(2): 185-194.
[6]Yee J, Sherwood J A, Fitzgerald S. Batted-ball performance of a composite softball bat as a function of ball type[J]. Procedia Engineering, 2014, 72: 465-470.
[7]Daniel R. Acoustics and vibration of baseball and softball bats[J]. Acoustics Today, 2017, 13(4): 35-42.
[8]LS-DYNA keyword user′s manual, Version 971[M]. Livermore, USA: Livermore Software Technology Corporation, 2006.
[9]Hallquist J. LS-DYNA theory manual[M]. Livermore, USA: Livermore Software Technology Corporation, 2006.
[10]Belytschko T, Lin J I, Tsay C S. Explicit algorithms for the nonlin-ear dynamics of shells[J]. Computer Methods in Applied Mechanics and Engineering, 1984, 42(2): 225-251.
[11]Feraboli P, Wade B, Deleo F, et al. LS-DYNA MAT54 modeling of the axial crushing of a composite tape sinusoidal specimen[J]. Composites: Part A, 2011, 42: 1809-1825.
[12]Feraboli P, Deleo F, Wade B, et al. Predictive modeling of an energy-absorbing sandwich structural concept using the building block approach[J]. Composites: Part A, 2010, 41: 774-786.
[13]McCallum S. The influence of preload and boundary conditions on pre-damaged composite plates subject to soft-body impact[J]. Materials & Design, 2015, 83: 848-857.
[14]Diaconescu C, Tabacu S, Oltean A. Design and analysis of a fused deposition modelling manufactured part[J]. IOP Conference Series: Materials Science and Engineering, 2017, 252(1): 1-8.
[15]Heimbs S, Cichosz J, Klaus M, et al. Sandwich structures with tex-tile-reinforced composite foldcores under impact loads[J]. Composite Structures, 2010, 92: 1458-1497.