Question

Critical Buckling Load--Spring Connection 

The leg in (a) acts as a column which can be modeled as in (b), where the spring connection at the knee has stiffness k (torque/rad). Assuming the bones to be rigid, determine the critical buckling load. 

The critical load of a spring connection is: 

• is a larger value than the pre-load state 

• assumed to be a small angle approximation before buckling occurs 

• found through the analysis of the FBD 

• all of the above  

Answer 1