| Title |
An Experimental Study on the Bending Stiffness of the Bolt Inserted Ball Joint |
| Authors |
Park Chul-Ho ; Han Sang-Eul |
| Keywords |
볼조인트 ; 반강접 ; 래티스돔 ; 탄소성볼조인트 ; 반강접 ; 래티스돔 ; 탄소성 |
| Abstract |
A single layer latticed dome is one of the most efficient structures because of a low specific gravity. For easily analyzing of a single layer latticed dome, joint system is assumed to be pin or rigid joint. But, its joint uses ball whose system has intermediate properties of pin and rigid joint. Therefore this study has a grasp of bending rigidity, stress ,and mechanical properties through experimental and analyzing method of the bolt inserted ball joint. To analyze the stress of bolt and sleeve, this study uses through 3D elastic contact and cubic element, and then the ball and the bolt are perfectly connected for easily analyzing. ??Compared experimental results to F.E.M, each specimen is an error of less than 12 percent. In the results of stress distribution through F.E.M, stresses occured in bottom of bolt to top of sleeve, and most of tension appears on the bolt, also compression occurs in upper parts of the bolt to the sleeve. The assumption of bending stiffness in ball joint is well known??that bolt resists only tension and upper sleeve resists compression. Results of experiment and analysis have 7～56 % error, assuring that upper part of bolt occurs of partial compression. |