In-situ strain measurements in the plastic deformation regime inside casted parts using fibre-optical strain sensors A contribution to the production of intelligent parts
In-situ strain measurements in the plastic deformation regime inside casted parts using fibre-optical strain sensors A contribution to the production of intelligent parts
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DOI：
10.1007/s11740-019-00874-7
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发表时间：
2019-06-01
影响因子：
1.7
通讯作者：
Volk, Wolfram
中科院分区：
文献类型：
--
作者：
Heilmeier, Florian;Koos, Robert;Volk, Wolfram
光纤布拉格光栅（fbg）被用作拉伸试样内的内部应变传感器，拉伸试样由铸造铝合金加工而成。嵌入式fbg有可能直接测量铸件内的应变，以便更好地了解零件设计过程中的载荷情况。此外，如果fbg留在部件中，则可以在实际条件下测量菌株，并为健康监测提供有价值的证据。通过外部和内部应变测量的比较，提供了应用的证明。逐步校准试验证明了fbg在外部应变和内部响应之间存在线性过渡，因此获得了恒定的转换因子。在普通拉伸试验中的应用证明了fbg的精确应变测量及其耐久性，直到试样失效前很短的时间。这些发现为fbg在实际结构部件中的应用奠定了基础，从而在未来的工作中生产智能部件。综上所述，与普通方法相比，使用fbg进行内部应变测量有可能提供额外的应变数据，从而改进设计过程，并监测运行条件下的铸件。
Fibre Bragg Gratings (FBGs) were employed as internal strain sensors within tensile specimens that were machined out of a casted aluminium alloy. Embedded FBGs have the potential to directly measure strains within a casted part for a better understanding of load cases for the part design process. In addition, if the FBGs remain in the part, strains can be measured under real-life conditions and return valuable evidence for health monitoring. The proof of application is provided by the presented tests by comparison of external and internal strain measurements. The step-wise calibration test gives evidence for a linear transition between external straining and internal response by the FBGs and thus a constant conversion factor was obtained. The application in a common tensile test proves a precise strain measurement by the FBGs and their durability until a short time before the specimens failed. These findings form the basis for an application of FBGs within real structural parts and thus the production of intelligent parts in future work. As a conclusion, internal strain measurements using FBGs have the potential to provide additional strain data compared to common methods and hence to improve the design process as well as to monitor casted parts under operating conditions.