Uniaxial ratcheting behavior of anisotropic conductive adhesive film at elevated temperature
Uniaxial ratcheting behavior of anisotropic conductive adhesive film at elevated temperature
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DOI：
10.1016/j.polymertesting.2011.04.010
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发表时间：
2011-08
期刊：
影响因子：
5.1
通讯作者：
Jian-hua Ma;Hong Gao;Li-Lan Gao;Xu Chen
中科院分区：
文献类型：
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作者：
Jian-hua Ma;Hong Gao;Li-Lan Gao;Xu Chen
利用DMA（DMA-Q800）对各向异性导电胶膜（ACF）在应力控制下进行了一系列高温单轴棘轮实验。研究了平均应力、应力幅值、温度和加载历史对ACF单轴棘轮行为的影响。结果表明，ACF的杨氏模量随温度的升高而迅速下降。棘轮应变随平均应力、应力幅值和温度的升高而增大。特别是当温度超过80 °C时，棘轮应变迅速积累。ACF在80 °C和120 °C下的单轴棘轮行为存在显著差异。在120 °C下的棘轮应变速率是在80 °C下的近20倍。棘轮应变随应力速率的增加而减小。此外，加载历史对棘轮行为的发展也起着重要的作用。先前的循环与较高的应力幅大大降低棘轮应变的后续循环在较低的应力。
A series of uniaxial ratcheting experiments on anisotropic conductive adhesive films (ACFs) were conducted under stress-control at elevated temperature using DMA (DMA-Q800). The effects of mean stress, stress amplitude, applied temperature and loading history on the uniaxial ratcheting behavior of ACF were investigated. The results show that Young’s modulus of the ACF declines rapidly with increasing temperature. The ratcheting strain increases as the mean stress, stress amplitude and temperature increased. Especially, when the temperature was over 80 °C, the ratcheting strain accumulated rapidly. There are significant differences in the uniaxial ratcheting behavior of ACF at 80 °C and 120 °C. The ratcheting strain rate at 120 °C is nearly twenty times that at 80 °C. The ratcheting strain decreases with increasing stress rate. Furthermore, the loading history also plays an important role in the progress of ratcheting. Previous cycling with higher stress amplitude greatly reduces ratcheting strain of subsequent cycling at lower stresses.