In-situ characterization of interface delamination by a new miniature mixed mode bending setup
In-situ characterization of interface delamination by a new miniature mixed mode bending setup
复制标题
DOI：
10.1007/s10704-009-9356-1
复制
发表时间：
2009-06
影响因子：
2.5
通讯作者：
M. Kolluri;M. Thissen;J. Hoefnagels;J. V. Dommelen;M. Geers
中科院分区：
文献类型：
--
作者：
M. Kolluri;M. Thissen;J. Hoefnagels;J. V. Dommelen;M. Geers
设计并实现了一种用于微型多层结构界面脱层原位表征的微型混合模式弯曲（MMMB）装置。该装置由一种新颖的测试配置组成，以实现全范围的模式混合度，并专门设计有足够小的尺寸，以适合在室的扫描电子显微镜（SEM）或在光学显微镜下进行详细的实时断裂分析分层过程中。特别注意的是，尽量减少摩擦的影响，重力的影响，和非线性，由于几何形状的设置。使用有限元分析支持的专门设计的测试样品评估设置的性能。在模式I和混合模式加载的均匀双层样品上进行的脱层实验用扫描电子显微镜进行可视化，并显示在裂纹尖端之前形成小的微裂纹，随后是裂纹桥接和完全裂纹，从而证明原位测试的优点，以揭示微观脱层机制。
A new miniature mixed mode bending (MMMB) setup for in-situ characterization of interface delamination in miniature multi-layer structures was designed and realized. This setup consists of a novel test configuration to accomplish the full range of mode mixities and was specially designed with sufficiently small dimensions to fit in the chamber of a scanning electron microscope (SEM) or under an optical microscope for detailed real-time fracture analysis during delamination. Special care was taken to minimize the effects of friction, the influence of gravity, and non-linearities due to the geometry of the setup. The performance of the setup was assessed using specially-designed test samples supported by finite element analyses. Delamination experiments conducted on homogeneous bilayer samples in mode I and mixed mode loading were visualized with a scanning electron microscope and showed the formation of small micro cracks ahead of the crack tip followed by crack bridging and a full crack, thereby demonstrating the advantages of in-situ testing to reveal the microscopic delamination mechanism.