Mieloszyk Magdalena, Majewska Katarzyna, Andrearczyk Artur
Institute of Fluid Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-231 Gdansk, Poland.
Materials (Basel). 2022 Apr 4;15(7):2653. doi: 10.3390/ma15072653.
Additive manufacturing (AM) polymers are applied in many branches of the industry due to the possibility of fast and accurate production of elements with various and complex shapes. Fibre Bragg grating sensors (FBG) are widely applied in structural health monitoring (SHM) systems. The main objective of this research is to perform analyses of the influence of embedded FBG sensors on AM polymer elements' durability. Two polymers (M3 X and M3 Crystal) with different mechanical properties were analysed. The tests were performed on samples with FBG sensors embedded in (different alignment) and attached to the surfaces of the elements. Firstly, the samples were exposed to elevated or sub-zero temperatures under stable relative humidity levels. The strain in the samples was measured using fibre Bragg grating (FBG) sensors. The achieved results allow us to determine the relationships between strain and temperature for both materials and the differences in their mechanical response to the thermal loading. Then, the samples were subjected to a tensile test. A comparison of the tensile strength values was performed for the samples without and with embedded FBG sensors. The samples after the tensile tests were compared, showing differences in the mechanisms of failures related to the polymers and the thermal treatment influence on the material internal structure. Additionally, strain values measured by the FBG sensors were compared to the strain values achieved from the testing machine showing a good agreement (especially for M3 X) and indicating the differences in the materials' mechanical properties. The achieved results allow us to conclude there is a lack of influence of embedded FBG sensors on the mechanical durability of AM polymers.
增材制造（AM）聚合物因其能够快速、精确地生产具有各种复杂形状的元件而被应用于许多工业领域。光纤布拉格光栅传感器（FBG）广泛应用于结构健康监测（SHM）系统。本研究的主要目的是分析嵌入式FBG传感器对增材制造聚合物元件耐久性的影响。分析了两种具有不同机械性能的聚合物（M3 X和M3 Crystal）。对嵌入（不同排列）FBG传感器并附着在元件表面的样品进行了测试。首先，在稳定的相对湿度水平下，将样品暴露于高温或低温环境中。使用光纤布拉格光栅（FBG）传感器测量样品中的应变。所获得的结果使我们能够确定两种材料的应变与温度之间的关系，以及它们对热载荷的机械响应差异。然后，对样品进行拉伸试验。对未嵌入和嵌入FBG传感器的样品的拉伸强度值进行了比较。对拉伸试验后的样品进行了比较，结果表明与聚合物相关的失效机制以及热处理对材料内部结构的影响存在差异。此外，将FBG传感器测量的应变值与试验机获得的应变值进行了比较，结果显示出良好的一致性（特别是对于M3 X），并表明了材料机械性能的差异。所获得的结果使我们能够得出结论，嵌入式FBG传感器对增材制造聚合物的机械耐久性没有影响。
