Mechanical Design and Evaluation of Hand Free Crutch



Liew, Zheng Jie (2018) Mechanical Design and Evaluation of Hand Free Crutch. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Crutch is an important and widely used medical equipment for patients who suffer from bottom body injuries. Conventional crutches bring a lot of inconvenience to the patients hence hand free crutch might be a better solution for patients. The benefits and limitations of both conventional crutch and hand free crutches are studied from several researches and resources. Few types of conventional crutches and their structures are learnt for optimization of the design for hand free crutch. There were some researches been done on these conventional crutches which measured on the pressure during the crutched walking. These researches can determine the suitable pressure and the strength of the hand free crutches with different length and material. Hence, using these information, further development of hand free crutch is enhanced by adding damper to the struts. Few studies had been carried out which consist of effects of mesh size on the reaction force to run the simulation, remodel of hand free crutch, design of hand free crutch with damper added and effect of damper height on the reaction force. From the simulation and result analyzed, few observations can be made. Firstly, the effect of mesh size on the reaction force is significant. Few mesh sizes have to be simulated to obtain the optimum mesh size so that the result will have higher accuracy. For the hand free crutch model that is used, the optimum mesh size is around 10,000 to 12,000 number of element. Second, the effect of damper height relative to the lateral foot tips is also a significant parameter to be determined. From the results obtained, the higher the height of damper, the smaller the reaction force therefore the higher the damping effect. Optimum height for this hand free crutch model is 380mm from the lateral foot tip.

Item Type: Final Year Project
Subjects: Technology > Mechanical engineering and machinery
Faculties: Faculty of Engineering and Technology > Bachelor of Engineering (Honours) Mechanical
Depositing User: Library Staff
Date Deposited: 10 Oct 2018 09:38
Last Modified: 10 Oct 2018 09:38