{"id":1314,"date":"2026-04-01T10:56:00","date_gmt":"2026-04-01T01:56:00","guid":{"rendered":"https:\/\/www.muratasoftware.com\/en_wacul_new\/fwp-new-wacul\/?post_type=case&#038;p=1314"},"modified":"2026-09-01T10:53:34","modified_gmt":"2026-09-01T01:53:34","slug":"gal030","status":"publish","type":"case","link":"https:\/\/www.muratasoftware.com\/en\/case\/gal030\/","title":{"rendered":"Contact Analysis Between Ball and Bat Leading to Bat Breakage"},"content":{"rendered":"\n<figure class=\"wp-block-table blockPattern__table\"><table><thead><tr><th>General<\/th><th>This is a contact analysis example of a baseball bat and a ball, in which the bat fractures after contacting the ball.<\/th><\/tr><\/thead><tbody><tr><td>Analysis Model<\/td><td>Initial velocities in opposite directions are assigned to the bat and the ball.<br><em>Contact Surface<\/em>&nbsp;and&nbsp;<em>Target Surface<\/em>&nbsp;boundary conditions are defined at the contact region.<br>To analyze the states before and after the bat fractures, two models are prepared and a result-import analysis is performed.<br>A gap is created in advance at the intended fracture location of the bat. The surfaces of this gap are assigned&nbsp;<em>Rigid Surface<\/em>&nbsp;boundary conditions. In the model after result import, these boundary conditions are changed to&nbsp;<em>Free<\/em>&nbsp;(unconstrained). This approach simulates the fracture of the bat.<\/td><\/tr><tr><td>Result<\/td><td>The displacement plot shows that the bat fractures while in contact with the ball, and that the broken portion separates while rotating.<br>A video of this analysis example is also available on the official Femtet YouTube channel. Please take a look by clicking&nbsp;<a href=\"https:\/\/youtu.be\/OBJR106vCLM\"><strong>here<\/strong><\/a>.<\/td><\/tr><tr><td>Keyword<\/td><td>Transient Stress Analysis, Contact Analysis, Contact Force, Rigid Surface, Baseball Bat Fracture<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6abb699a51ac8&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6abb699a51ac8\" class=\"wp-block-image size-full wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"506\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" data-id=\"3991\" 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