Advantages of the extended finite element method for the analysis of crack propagation in power modules

Nwanoro, Kenneth Chimezie; Lu, Hua; Yin, Chunyan; Bailey, C.

doi:10.1016/j.pedc.2022.100027

Cited by 7 publications

(3 citation statements)

References 40 publications

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“…This trend is consistent with the findings in [20], it was reported a similar pattern in their experiments. It is also similar to the reduction in bond shear strength that occurs with increasing crack growth, as reported in [21]. Despite the low value of Vce (less than 5%) shown in Fig.…”

Section: Crack Evolutionsupporting

confidence: 88%

New model of crack propagation of aluminium wire bonds in IGBT power modules under low temperature variations

Halouani

Khatir

Lallemand

et al. 2023

Microelectronics Reliability

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Section: Crack Evolutionsupporting

confidence: 88%

New model of crack propagation of aluminium wire bonds in IGBT power modules under low temperature variations

Halouani

Khatir

Lallemand

et al. 2023

Microelectronics Reliability

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“…The depicted results are obtained from a probing point, which is a line/path along the wire bond shown in Fig. 7a, considering the significance of the site [34]. FOM-ANSYS and pROM (Lagrange and Bi-linear) stress results are displayed in Fig.…”

Section: Resultsmentioning

confidence: 99%

Thermal-Mechanical Analysis of a Power Module with Parametric Model Order Reduction

Hassan,

Rajaguru,

Stoyanov

et al. 2024

IMAPSource Proceedings

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This paper presents parametric model order reduction (pMOR) by the Lagrange approach of matrix interpolation for the thermal-mechanical and reliability study of a power electronics module (PEM) with nonlinear behaviours. Most previous research in model order reduction (MOR) studies reports thermal-mechanical simulations using a sequentially coupled method. In this research, a direct-coupled thermal-mechanical analysis, which simultaneously solves the thermal and structural governing equations, has been used to obtain thermal and deformation results. Furthermore, for pMOR, the linear approach of matrix interpolation is limited to linear changes between sampled-parametric points. Hence, a new way of interpolating system matrices using the Lagrange interpolation method has been adopted to implement the matrix interpolation efficiently. The parametric reduced-order model (pROM) solution by the Lagrange approach of matrix interpolation agrees well with the full-order model (FOM) and takes similar computational time as the linear (bi-linear) approach of matrix interpolation. pROM simulations offer up to 85.5% reduction in computational time.

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“…heat generating source, SiC-based semiconductor, to its opposite side. So, the results show the predicted stresses in the wire body for the considered probing point (line/path), considering the importance of this area [37,38]. Fig.…”

Section: E Resutls and Discussionmentioning

confidence: 98%

Parametrising Temperature Dependent Properties in Thermal-Mechanical Analysis of Power Electronics Modules using Parametric Model Order Reduction

Hassan

Rajaguru

Stoyanov

et al. 2023

2023 46th International Spring Seminar on Electronics Technology (ISSE)

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In this paper, a direct-coupled thermalmechanical analysis of a Power Electronics Modules (PEM) using ANSYS-FEM (Finite Element Method) is integrated with a Parametric Model Order Reduction (pMOR) technique. Unlike most present studies on model order reduction, which perform the coupled thermal-mechanical analysis by sequentialcoupled thermal-mechanical models, the direct-coupled thermal-mechanical approach deployed in this study solves the thermal and structural models simultaneously. Commonly, pMOR mainly focuses on parametrising model parameters (e.g., material properties, loads.) that are constants. In this investigation, a new approach to parametrise temperaturedependent properties using pMOR, such as the coefficient of thermal expansion (CTE) of the materials in PEM structures, has been demonstrated in the context of the reliability assessment of electronic modules. A two-dimensional finite element model of a PEM is developed and used to study the temperature-dependent CTE effects of the Aluminium (Al) alloy on the thermal-mechanical response of the system under thermal load. A Krylov subspace-based technique, PRIMA, has been used for the model order reduction and a linear approach of matrix interpolation for the parametrisation in the pMOR. The full-order state-space model has 30,612 degrees of freedom (DOFs), and the reduced model achieved by pMOR has just 8 DOFs. The simulation runs show that with this approach, a substantial reduction in computational time can be achieved, for this problem, by 81% between the full and the reduced order models. In modelling predictions, the pMOR-based solution has retained the accuracy of results. In this instance, the average difference in stress result, compared to the ANSYS-FEM model (FOM) solution, is only 0.43%.

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Advantages of the extended finite element method for the analysis of crack propagation in power modules

Cited by 7 publications

References 40 publications

New model of crack propagation of aluminium wire bonds in IGBT power modules under low temperature variations

New model of crack propagation of aluminium wire bonds in IGBT power modules under low temperature variations

Thermal-Mechanical Analysis of a Power Module with Parametric Model Order Reduction

Parametrising Temperature Dependent Properties in Thermal-Mechanical Analysis of Power Electronics Modules using Parametric Model Order Reduction

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