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基于模糊理论的随机振动条件下叠层PBGA焊点可靠性分析

韦何耕1,黄春跃2

韦何耕1,黄春跃2. 基于模糊理论的随机振动条件下叠层PBGA焊点可靠性分析[J]. 焊接学报, 2018, 39(2). DOI: 10.12073/j.hjxb.2018390039
引用本文: 韦何耕1,黄春跃2. 基于模糊理论的随机振动条件下叠层PBGA焊点可靠性分析[J]. 焊接学报, 2018, 39(2). DOI: 10.12073/j.hjxb.2018390039

基于模糊理论的随机振动条件下叠层PBGA焊点可靠性分析

  • 摘要: 对叠层塑料球栅阵列(plastic ball grid array package, PBGA)焊点在随机振动条件下的可靠性进行了研究. 通过模态分析,提取固有频率和振型,接着进行随机振动分析,得到叠层PBGA焊点的应力分布特性;引入模糊理论修正钎料的应力—寿命曲线(S-N curve),并结合三带技术对叠层PBGA焊点随机振动疲劳寿命进行了计算. 结果表明,组件在一阶固有频率下振动时,芯片处的振幅最大;组件边角叠层焊点受到的应力最大,且芯片侧应力大于PCB侧;模糊理论的引入使得1 σ与2 σ应力水平对叠层PBGA焊点产生的损伤得以考虑,从而实现对叠层PBGA焊点振动疲劳寿命更准确预测.
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出版历程
  • 收稿日期:  2016-04-19

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