Tennis racket non-destructive experiment

Update:21-09-2018
Summary:

In most manufacturing processes, quality, balance point […]

In most manufacturing processes, quality, balance point and rotational mass are monitored at different stages to identify problems as early as possible in the process. The quality, balance point, rotation quality and frame stiffness of the tennis racket are the basic indicators of the manufacturing process. They are usually tested at random or after the tennis racket is completed.
There is a specific experiment, a three-point bending test, that tests the bending strength along the impact direction of the racquet length. Select two points on each side of the racket face to support the racket, while the clock hands point to the 5 o'clock and 6 o'clock positions on the other side, and the other side at 10 o'clock and 11 o'clock (the face of the racket is considered The surface of a clock) is clamped to the discrete points along the face of the racket with a load on both sides of the frame, and the deviation of all points is tested and compared with other different rackets. The test of the racket torsion degree is a torque test, which is similar to the three-point bending test, but the support points are different. The support point of the torque test is on either side of the racket face instead of the two sides, that is, at 5 o'clock and 11 At the hour, this produces a torsion on the frame, which is measured by the deviation to reflect the degree of torsion of the racket.
The top deformation experiment uses a two-point loading method to load the load at 1 o'clock and 11 o'clock at the top of the racket to indicate the strength of the top of the racket along the radial direction. This is a critical area on the racquet face and can be subjected to very large loads when subjected to impact. In addition, the experiment was also used to test the deviation of the load used.

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