An In Situ Experimental‐Numerical Approach for Characterization and Prediction of Interface Delamination: Application to CuLF‐MCE Systems
An In Situ Experimental‐Numerical Approach for Characterization and Prediction of Interface Delamination: Application to CuLF‐MCE Systems
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界面分层表征和预测的原位实验数值方法：在 CuLF-MCE 系统中的应用
DOI：
10.1002/adem.201200110
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发表时间：
2012
影响因子：
3.6
通讯作者：
M. Geers
中科院分区：
文献类型：
--
作者：
M. Kolluri;J. Hoefnagels;Mohammad Samimi;Hans van Dommelen;O. van der Sluis;M. Geers
通过改进设计预防分层失效需要精确表征和预测混合模式界面分层。本文提出了一种结合原位实验-数值方法来充分表征分层预测的界面行为。该方法在两种类型的工业相关界面样品上进行了演示-涂覆铜引线框架-黑色模塑料环氧树脂和未涂覆铜引线框架-白色模塑料环氧树脂，使用小型化原位SEM混合模式弯曲装置详细表征了分层行为，并使用新开发的自适应内聚区（CZ）有限元框架进行了模拟。为此，分析了混合模式载荷位移响应、断裂韧性与模式角的趋势以及分层前缘的真实的时间显微观察结果，以确定所有CZ参数。各种模拟结果被发现与可访问的模式混合度范围内的实验一致，表明表征过程能够准确地获得不同界面的内聚特性，以及自适应CZ框架的稳定性和效率。
Prevention of delamination failures by improved design calls for accurate characterization and prediction of mixed‐mode interface delamination. In this paper, a combined in situ experimental‐numerical approach is presented to fully characterize the interface behavior for delamination prediction. The approach is demonstrated on two types of industrially‐relevant interface samples – coated copper lead frame‐black molding compound epoxy and uncoated copper lead frame‐white molding compound epoxy, – for which the delamination behavior is characterized in detail using a miniaturized in situ SEM mixed‐mode bending setup and simulated using a newly developed self‐adaptive cohesive zone (CZ) finite element framework. To this end, mixed‐mode load‐displacement responses, fracture toughness versus mode angle trends, and real‐time microscopic observations of the delamination front are analyzed to determine all CZ parameters. The various simulation results are found to be in agreement with experiments for the range of mode mixities accessible, demonstrating the ability of the characterization procedure to accurately obtain the cohesive properties of different interfaces, as well as the stability and efficiency of the self‐adaptive CZ framework.