3 research outputs found
Strength and Fatigue Analysis of FDM-fabricated Non-assembly Bi-material Compliant Mechanisms
No full textMulti-material compliant mechanisms have shown the potential to be utilized in the upper-limb prosthesis. The mechanisms consist of flexural and rigid parts, where the flexural components can serve as flexible joints between rigid bodies in the device (e.g., finger and finger segments). This configuration is feasible to be fabricated using a type of additive manufacturing called Fused Deposition Modelling (FDM) process, without the need of further assembly and extensive post-processing. Knowledge of the mechanical characteristics of such mechanisms, however, is still limited. Therefore, this study presents the strength and fatigue characteristics of bi-material compliant mechanisms to determine the feasibility of applying the mechanisms in the upper-limb prosthesis for long-term use. The basis of the mechanisms was a configuration of two rigid clamps and a flexible beam that were automatically assembled during manufacturing. Two materials selections (PLA-TPU and Tough PLA-TPU) and three geometries (rectangular, cylindrical, and tapered-shaped interface) were used to create six groups of samples. These groups were subjected to tensile testing and fatigue testing to assess their strength and fatigue behavior. The results of mechanical testing were also verified with the results of finite element simulation. It was found that four groups fulfilled the strength requirement, which were mechanisms in both material configurations with cylindrical and tapered-shaped interface. These groups, however, failed to demonstrate their durability during fatigue testing. Finally, the proposed method of fabrication and mechanical testing as well as the obtained mechanical characteristics of the mechanisms were analyzed to give insights for future development.Biomedical Engineerin
FUNCTION, MEANING, AND MESSAGE OF THE NATURAL ENVIRONTMENT IN THE STORY OF KEONG MAS
No full textThis research discusses the meaning and function of the natural environment in one folk tale that is well known in the Javanese community. This folktale is known in all circles of society, despite having social differences. An interesting problem in this folklore is the placement of functions and environmental meanings as the main elements of stories or tales. The focus of this research is to raise the function and meaning of the natural environment contained in one story of Keong Mas. This study aims to explain carefully the function and meaning of the natural environment which is the background of a fairy tale. The background story that uses the natural environment as the main object of the story often gets no attention. In the story of Keong Mas, it is precisely the setting that contains the natural environment that has functions and meanings that are very important to understand. This study uses a qualitative research paradigm procedure, which gives researchers the opportunity to interpret available data. The results of the study show that the story of Keong Mas is not just an ordinary folktale. Keong Mas folklore has a very specific story setting, which is a particular natural environment. Keong Mas or Pila ampullacea are animals that can live on land or in water. Rural communities who live on the banks of the river by cultivating crops such as rice, can find these types of animals around their environment. No wonder this animal is an inspiration to make a story in the background of the natural environment in the countrysid
FUNCTION, MEANING, AND MESSAGE OF THE NATURAL ENVIRONTMENT IN THE STORY OF KEONG MAS
No full textThis research discusses the meaning and function of the natural environment in one folk tale that is well known in the Javanese community. This folktale is known in all circles of society, despite having social differences. An interesting problem in this folklore is the placement of functions and environmental meanings as the main elements of stories or tales. The focus of this research is to raise the function and meaning of the natural environment contained in one story of Keong Mas. This study aims to explain carefully the function and meaning of the natural environment which is the background of a fairy tale. The background story that uses the natural environment as the main object of the story often gets no attention. In the story of Keong Mas, it is precisely the setting that contains the natural environment that has functions and meanings that are very important to understand. This study uses a qualitative research paradigm procedure, which gives researchers the opportunity to interpret available data. The results of the study show that the story of Keong Mas is not just an ordinary folktale. Keong Mas folklore has a very specific story setting, which is a particular natural environment. Keong Mas or Pila ampullacea are animals that can live on land or in water. Rural communities who live on the banks of the river by cultivating crops such as rice, can find these types of animals around their environment. No wonder this animal is an inspiration to make a story in the background of the natural environment in the countrysid
