Analysis | Cwuprostheticarm

A-1: The scenario for weight being applied solely on the fingers is the basis of this analysis. The fingers are designed with limiting tabs to stop backward rotation and need a minimum specified size.

A-2: This analysis was meant to test the pin dimensions of the finger joints. Specifying a 1/8” steel pin.

A-3: This analysis was for the necessary thickness of the tab that may be used to facilitate the wrist movement at an angle.

A-4: An analysis of what bending stress the palm would be under in a 50 pound load situation, and if it would fail.

A-5: An analysis of the necessary fit of the joint pins in order to produce unrestricted movement.

A-6: An initial analysis on the max load of ABS glue as the halves of a joint are tested. A max property could not be found due to the glue being considered permanent in a standard environment.

A-7: An analysis of the shell thickness needed to hollow out the palm for articulation purposes.

A-8: An analysis on the potential failure point of the ears on the finger joints. They are the thinnest area, being 1/8 inch thick.

A-9: Analysis of the angled upper finger joint in terms of force components in the x and y axis. Necessary information for actuation cam design.

A-10: An analysis of the available area within the lower finger joints so that components for motion have ample room to move.

A-11: This is analysis of the shear component working on the upper finger joint. The 80 pound value was determined from A-9.

A-12: An analysis of the hollowed lower finger joint as a column. A column analysis was chosen to determine if the joint is susceptible to buckling when the test load is applied.

Click Here to go to the assorted green sheets and Here for the detailed analysis information.