Damage detection via embedded sensory particles – Effect of particle/matrix interphase properties
Damage detection via embedded sensory particles – Effect of particle/matrix interphase properties
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DOI：
10.1016/j.compstruct.2019.111536
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发表时间：
2020-01
影响因子：
6.3
通讯作者：
M. Mirsayar;D. Hartl
中科院分区：
文献类型：
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作者：
M. Mirsayar;D. Hartl
最近的研究支持，裂纹内部的主机材料将导致一个特别强的应力集中，因此可以通过监测或传感的局部变化的磁性颗粒在金属复合材料中检测。使用有限元分析校准从实验中，这项工作研究的材料特性和厚度的颗粒/基体界面上的相变响应的嵌入式传感器颗粒在附近的裂纹存在于主机矩阵。根据界面弹性和内聚性质、其厚度和已知延迟或促进马氏体转变的操作温度，发现界面损伤可能在低于在MSMA颗粒中引发相变所需的应力水平的应力水平下发生。这样的响应将减轻粒子变换的程度并降低粒子灵敏度。通过完全析因试验设计，研究了颗粒相对于裂纹尖端的位置对界面损伤和颗粒相变响应的影响。为了评估该技术的真正可行性，在给定恒定施加的磁场和施加的应力场的颗粒附近的磁导率的平均变化进行评估。
Supported by recent studies, a crack interior to the host material will cause an especially strong stress concentration and thus can be detected by monitoring or sensing the localized changes in the magnetic properties of the particles in metallic composites. Using finite element analysis calibrated from the experiments, this work investigates the effects of material properties and thickness of the particle/matrix interphase on the phase transformation response of embedded sensory particles in the vicinity of a crack existing in the host matrix. Depending on the interphase elastic and cohesive properties, its thickness, and the operational temperature, which is known to delay or promote martensitic transformation, it is found that interphase damage may occur at stress levels lower than that needed to initiate phase transformation in MSMA particles. Such a response would mitigate the degree to which the particle transforms and reduces particle sensitivity. The effect of particle position relative to the crack tip on interphase damage and particle transformation response is studied via the full factorial design of experiments. To assess the true feasibility of the technique, the average change in magnetic permeability in the vicinity of the particle given constant applied magnetic and applied stress fields is evaluated.