a performance comparison between cricket bat designs
DESCRIPTION
A Performance Comparison Between Cricket Bat DesignsTRANSCRIPT
04/21/2023 1
A performance comparison between cricket bat designs
CH ANILDepartment of Chemical Engineering
IISc Bangalore
CH ANIL IISc Bangalore
04/21/2023 CH ANIL IISC Bangalore 2
OutlinesIntroductionObjectiveMaterials and methods
Vibration analysisMoment of inertiaBending stiffness
Results and discussionconclusions
04/21/2023 CH ANIL IISC Bangalore 3
IntroductionDesign variations
Efficiency of the shotReduce the effort of
the playerCricket bat
performanceSweet spotStiffnessMoment of inertiaCoefficient of
restitution
04/21/2023 CH ANIL IISC Bangalore 4
ObjectiveTesting of cricket bats performanceEffect of novel designs on physical
properties and performanceSource: T Eptaxiopoulou.et
al,proc.IMechE, vol226 part P, J.sports engg. and technology
04/21/2023 CH ANIL IISC Bangalore 5
Materials Bat Mass(K
g)Blade length(mm)
Blade width(mm)
status
description
Bat 1 1.266 375 106 legal Short blade
Bat 2 1.223 532 108 legal Standard curved profile
Bat 3 1.176 542 106 legal Standard curved profile
Bat 4 1.168 557 108 legal Standard curved profile
Bat 5 1.138 540 108 illegal
Carbon handle
Bat 6 1.164 549 108 legal Standard curved profile
Bat 7 1.212 537 108 illegal
Carbon handleDescription of the bats
Source: T Eptaxiopoulou.et al, proc.IMechE, vol226 part P, J.sports engg. and technology
04/21/2023 CH ANIL IISC Bangalore 6
Vibration analysisImpulse hammer technique
04/21/2023 CH ANIL IISC Bangalore 7
Experimental set upSource: T Eptaxiopoulou.et al, proc.IMechE, vol226 part P, J.sports engg. and technology
04/21/2023 CH ANIL IISC Bangalore 8
Vibration analysisImpulse hammer techniqueMiniature accelerometerMode shape or vibration modeNode of a vibration modeAccuracy - Coherence function
04/21/2023 CH ANIL IISC Bangalore 9
Moment of inertia
Source: T Eptaxiopoulou.et al, proc.IMechE, vol226 part P, J.sports engg. and technology
Pendulum arrangement for MoI
04/21/2023 CH ANIL IISC Bangalore 10
Contd.The period of a physical pendulum
where
I: moment of inertia of bat d: distance between pivot point and centre of
mass
04/21/2023 CH ANIL IISC Bangalore 11
Bending stiffness
Source: T Eptaxiopoulou.et al, proc.IMechE, vol226 part P, J.sports engg. and technology
04/21/2023 CH ANIL IISC Bangalore 12
Three point bending testBending stiffness(EI)Uniaxial material testing
machine( Instron model 5866)
A 1000N load cell
WhereE: Elastic modulus, I:
second moment of areaP: load, L: length between
two supports, w: deflection
04/21/2023 CH ANIL IISC Bangalore 13
Source: T Eptaxiopoulou.et al, proc.IMechE, vol226 part P, J.sports engg. and technology
04/21/2023 CH ANIL IISC Bangalore 14
Contd..The size of sweet spot for carbon fiber handle bats(5,7)-----
0.19m for short blade bat(1) -----0.18mTraditional design bats ----0.135 to 0.16m
04/21/2023 CH ANIL IISC Bangalore 15
Bat Mass(Kg)
Distance to CoM (m)
Moment of Inertia(Kg m2)
Bending stiffness (EI) of sweet spot(Nm2)
Bending stiffness(EI) of handle(Nm2)
Bat 1
1.266 0.479 0.3475 901 79
Bat 2
1.223 0.461 0.3131 432 66
Bat 3
1.176 0.485 0.3014 683 39
Bat 4
1.168 0.450 0.2866 661 48
Bat 5
1.138 0.491 0.3220 602 26
Bat 6
1.164 0.449 0.2770 653 42
Bat 7
1.212 0.480 0.3270 610 25Source: T Eptaxiopoulou.et al, proc.IMechE, vol226 part P, J.sports engg. and technology
04/21/2023 CH ANIL IISC Bangalore 16
ConclusionsSeven bats were testedMoI, bending stiffness and vibration
analysis conductedSweet spot area estimatedRedistribution of mass
Moment of inertia increases, increases in coefficient of restitution
Carbon fibers-imparting the maximum energy to the ball
04/21/2023 CH ANIL IISC Bangalore 17
Thank you