| Summary: | 碩士 === 國立屏東科技大學 === 車輛工程系所 === 99 === In this thesis, three-dimensional elastic-plastic dynamic finite element models are used to simulate the contact deformation of wound area while negative pressure is applying to the wound. The effects of different parameters on the changes of micro-mechanical behaviors, including contact stress, wound convexity displacement and sponge deformation, on the contact area between the sponge and wound are explored. The parameters discussed are the sponge material, sponge thickness, sponge pore diameter, sponge pore spacing and applied negative pressure.
The results indicate that for a general wound model, the wound normal strain and wound convexity displacement increases with an increasing sponge Young’s modulus, sponge pore diameter, or applied negative pressure and decreases with an increasing sponge thickness. For a pressure ulcer wound model with sponge not fully filled, the normal strain of wound on the A1 area increases with an increasing sponge Young’s modulus or sponge thickness and decreases with an increasing applied negative pressure. The normal strain of wound on the A2 area increases with an increasing sponge pore diameter and decreases with an increasing sponge Young’s modulus, sponge thickness, sponge pore spacing or applied negative pressure. In addition, a larger sponge Young’s modulus, sponge thickness, sponge pore diameter or negative pressure can induce a larger wound displacement on the A1 and A2 area. For a pressure ulcer wound model with sponge fully filled, the normal strain of wound on the A1 and A2 area increases with an increasing sponge pore diameter. However, a larger sponge Young’s modulus, sponge thickness, sponge pore spacing or negative pressure can reduce the normal strain of wound. The wound convexity displacement on the A1and A2 area increases with an increasing sponge Young’s modulus, sponge pore diameter, or applied negative pressure. The wound convexity displacement on the A2 area decrease with an increasing sponge pore spacing. The research results can provide a basis for the reference of wound care.
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