What are open pairs defined as in the study of mechanism joints__________________?
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Answer: C. elements of pairs not held together mechanically
Explanation
Kinematic pairs that rely solely on physical contact without mechanical fastening are classified as open pairs. Gravity or external external forces typically keep the contacting elements together during their operating cycle. This lack of permanent mechanical connection means the joint can separate if opposing separation forces exceed constraints. Kinematic pairs are classified based on the nature of contact and the mechanical constraints holding them together. Closed pairs are mechanically enclosed or locked so that relative motion is constrained in all directions. Cam and follower mechanisms often operate as open pairs when relying on springs to maintain surface contact.
Point or line contact describes higher kinematic pairs rather than the fastening characteristics of open joints. Surface contact refers to lower kinematic pairs which distribute applied loads across a wider area. Pairs that permit relative motion define the general category of kinematic pairs rather than distinguishing open types.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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