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首页> 外文会议>International Cocoa Beach Conference >PIEZOELECTRIC ACTUATION OF CRACK GROWTH ALONG POLYMER/METAL INTERFACES IN ADHESIVE BONDS
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PIEZOELECTRIC ACTUATION OF CRACK GROWTH ALONG POLYMER/METAL INTERFACES IN ADHESIVE BONDS

机译：兼粘合剂中的聚合物/金属界面的压电致动

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A new experimental technique for determining mechanical properties of the polymer/metal interface was developed by replacing the conventional mechanical testing machine with a piezoelectric actuator. The actuator was made from a thin ferroelectric ceramic beam attached to a bilayer polymer/metal composite specimen. The trilayer specimen was loaded by applying ac electric fields on the piezoelectric actuator to drive crack growth along the polymer/metal interface. Using this technique, fatigue crack growth behavior of epoxy/aluminum interface was studied as a function of electric field, crack length and cyclic frequency. The crack growth rate was found to depend on the magnitude of the applied electric field and decrease with testing frequency.
机译：通过用压电致动器代替传统的机械试验机来开发用于确定聚合物/金属界面的机械性能的新实验技术。致动器由连接到双层聚合物/金属复合样品的薄铁电陶瓷束制成。通过在压电致动器上施加交流电场来装载三晶样标本，以驱动沿聚合物/金属界面的裂纹生长。使用这种技术，研究了环氧/铝界面的疲劳裂纹生长行为作为电场，裂缝长度和循环频率的函数。发现裂缝生长速率取决于所施加的电场的大小，并随着测试频率的降低。

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