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An in-situ and cost-effective numerical–experimental approach for fatigue characterization of bi-material interfaces in microelectronic packages is presented. In this method using a sample-centered approach, a miniaturized sub-critical bending (MSCB) test setup is designed and fabricated based on the samples that are acquired directly from the production-line. Sub-critical crack growth (SCCG) is captured...
An accelerated and cost-effective characterization method for bi-material interfaces under cyclic loading using a Miniaturized Sub-Critical Bending (MSCB) test setup is presented. The Modified Single Leg Bending (MSLB) samples are acquired directly from production-line, Thin Quad Flat Package (TQFP). Under sub-critical cyclic loading, crack was found to occur at the polymer-metal interface. The crack...
An in-situ and cost-effective numerical-experimental approach for fatigue characterization of bi-material interfaces in Microelectronic Packages is presented. In this method using a sample-centered approach a Miniaturized Sub-Critical Bending (MSCB) test setup is designed and fabricated based on the samples that are acquired directly from production-line. The accuracy of the results and stiffness...
In this paper, an accelerated and cost-effective characterization method for bi-material interfaces under cyclic loading using a Miniaturized Cyclic Mixed-mode Bending (MCMB) test setup is presented. The Modified Single Leg Bending (MSLB) samples are acquired directly from production-line Thin Quad Flat Package (TQFP) which provide a mixed-mode I + II loading condition. Under sub-critical cyclic loading,...
In this paper we examine the influence of different characteristics of TQFP (thin quad flat package) components on package behavior by simulation and experiment. The varied parameters are the package dimensions, rate-dependent material properties such as viscoelasticity and cure shrinkage and external boundary conditions.
Strain‐Induced Crystallization (SIC) is a phenomenon characterized by a considerable increase in stiffness of natural rubbers. In this contribution, this phenomenon is studied in filled natural rubbers and a constitutive model of SIC is proposed. The influence of SIC on the mechanical behavior is described by means of the entropic strain energy subjected to a change due the crystallization. The distribution...
Material properties in general and layer‐specific stiffness in particular are critical factors to predict the initiation and growth of aneurysms. Previous experimental studies show vastly differing material stiffness and metabolic activity in the media and the adventitia. In this paper a phenomenological model using FEM is applied in order to predict the adaptive response of the arterial wall in different...
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