复合纤维材料中压力传感器的应力分析和优化

在流量控制系统中,需要在由复合纤维材料制成的机翼中嵌入压力传感器.由于机翼结构会对压力传感器的性能产生影响,因此,通过有限元分析软件对该模型在一定拉力作用下的应力情况进行模拟,发现在压力传感器的边缘出现了应力集中.通过3种改进设计,可以降低或者消除应力集中,即对传感器的4个外直角进行倒棱操作;将传感器旋转45°后嵌入;在传感器外围黏合铝合金薄片.在对上述3种优化方法进行有限元分析模拟后,发现在传感器外围黏合铝合金薄片有效提高了传感器的抗拉强度,消除了应力集中.

Stress analysis and optimization of embedded pressure sensor in composite fiber material

In flow control system,pressure sensor is embedded in wing in material made of composite fiber of which the structure will affect performance of the pressure sensor.The stress situation of the embedded pressure sensor can be simulated with the help of finite-element-analysis software.The result is,that the stress concentration appears at the edge of the pressure sensor.By improving the design of sensor,the stress concentration can be reduced or eliminated.The improving methods include the chamfer of 4 right-angle corners of sensor,rotation of 45°before embedding,and a peripheral bonding with an aluminum foil.As a result of the finite-element-analysis simulation of these three improving methods,the bonding with aluminum foil effectively improves the tensile strength of the sensor and eliminates the stress concentration.