Three-dimensional Finite Element Analysis of the Effect on the Clasp Stiffness and Stress with Various Curvatures of the Cast Circumferential Clasp Arm
1995 Volume 39 Issue 1 Pages 146-152
Details
1995 Volume 39 Issue 1 Pages 146-152
The effect of the variation of the curvature of the cast circumferential clasp arm on clasp stiffness and stress was evaluated using three-dimensional finite element analysis.The results were as follows:
1. The curvature of the clasp arm under the condition of different lengths affected stiffness and stress.
1) The clasp arm using a non-tapered pattern with a small curvature showed less stiffness and lower stress than the arm with a large curvature.
2) The clasp arms using the original patterns, which were established from our previous study (taper 0.8, T/W ratio: 1/2 or 1/3), showed constant stiffness and low stress instead of change of curvature.
3) The clasp arm using Rapid flex pattern with large curvature showed lower stress than the arm with a small curvature.
2. The clasp arm with an adequate curvature in the condition of the same length showed low stress. This seemed to be the effect of torsion elasticity which was regarded to distribute the stress in the clasp arm.
