【摘 要】
：
In order to enhance the performance of piezoresistive sensors, insight gained from engineering experiences has been exploited to locally amplify strain or s
【机 构】
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TheStateKeyLaboratoryofDigitalManufacturingEquipmentandTechnology,HuazhongUniversityofScienceandTech
【出 处】
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ASMDO 2012(Forth International Conference on Multidisciplina
论文部分内容阅读
In order to enhance the performance of piezoresistive sensors, insight gained from engineering experiences has been exploited to locally amplify strain or stress in the local region where piezoresistive elements are placed.However, there lacks a systematic and automatic method for tailoring the stress in a specified local region to enhance the performance of a piezoresistive sensor.In order to deal with this issue, a shape and topology optimization based approach is investigated in the present study.Based on the analysis of a typical configuration of piezoresistive sensors, the intensity and uniformity of stress in piezoresistive elements are identified as the parameters that affect the performance of a sensor.To enhance the performance, a shape and topology optimization problem is formulated to ensure the stress is high and uniform in a local region where the piezoresistive elements are placed.The optimization problem is solved via the level set based method.To compute stress accurately, artificial weak material conventionally that are often used to mimic void is avoided in the finite element analysis.Numerical examples in two dimensions are investigated.
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