On Study of Impact Force and Humerus Injury for a Baseball
-
- SAKAI Shinobu
- Department of Human and Mechanical Systems Engineering, Kanazawa University
-
- ODA Juhachi
- Department of Human and Mechanical Systems Engineering, Kanazawa University
-
- YONEMURA Shigeru
- (株) PFU
-
- SAKAMOTO Jiro
- Department of Human and Mechanical Systems Engineering, Kanazawa University
Bibliographic Information
- Other Title
-
- 野球ボールの衝撃力と上腕損傷に関する研究
- ヤキュウ ボール ノ ショウゲキリョク ト ジョウワン ソンショウ ニ カンスル ケンキュウ
Search this article
Abstract
In the United States and Japan, baseball is a very popular sport played by many people. However, the ball used is hard and moves fast. A professional baseball pitcher in good form can throw a ball at up to 41.7 m/s (150km/hr). If a ball at this speed hits the batter, serious injury is quite likely. In this paper we will describe our investigations on the impact of a baseball with living tissues by finite element analysis. Baseballs were projected at a load cell plate using a specialized pitching machine. The dynamic properties of the baseball were determined by comparing the wall-ball collision experimentally measuring the time history of the force and the displacement using dynamic finite element analysis software (ANSYS/LS-DYNA). The finite element model representing a human humerus and its surrounding tissue was simulated for balls pitched at variable speeds and pitch types (knuckle and fast ball). In so doing, the stress distribution and stress wave in the bone and soft tissue were obtained. From the results, the peak stress of the bone nearly yielded to the stress caused by a high fast ball. If the collision position or direction is moved from the center of the upper arm, it is assumed that the stress exuded on the humerus will be reduced. Some methods to reduce the severity of injury which can be applied in actual baseball games are also discussed.
Journal
-
- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
-
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 73 (734), 1177-1182, 2007
The Japan Society of Mechanical Engineers
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390282679455483904
-
- NII Article ID
- 110006419397
-
- NII Book ID
- AN0018742X
-
- ISSN
- 18848338
- 03875008
-
- NDL BIB ID
- 9251657
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
-
- Abstract License Flag
- Disallowed