Special Issue "Mechanical Reliability of Advanced Materials and Structures for Harsh Applications"

Submission Deadline: 30 April 2022 (closed)
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Guest Editors
Prof. Xu Long, Northwestern Polytechnical University, China
Dr. Kim S Siow, National University of Malaysia, Malaysia
Prof. Chengqing Wu, University of Technology, Sydney, Australia

Summary

In recent years, there is an increase in demands requiring materials and structures to be designed to withstand harsh environments, such as extreme high and low temperatures, high-speed impacts, high density of power and electric current. The harsh applications anticipate satisfactory service reliability of structures, which nevertheless are challenging to be investigated experimentally at an unaffordable cost. This provides the opportunities to perform numerical simulations or analyses to evaluate the reliability of structures with sufficiently accurate material models in harsh environments.

 

We initiate this Special Issue to report and discuss recent progress in various aspects of mechanical behaviour and reliability of advanced engineering materials and structures for harsh applications in different areas such as microelectronics, aeronautics and astronautics. This Special Issue welcomes original research and review articles on all aspects of advanced materials and structures with the knowledge and understanding of the processes and mechanisms that induce deterioration or failure to predict reliability and improve structural performance. Topics of interest include (but not limited to):

 

• Constitutive models of materials in complicated loading applications

• Novel materials for electronic packaging structures

• Thermal management and advanced interconnection for high power devices

• Life prediction models and failure analysis

• New experimental methods to evaluate constitutive behaviour

• Reliability tests

• Machine learning algorithms and applications


Keywords
Mechanical reliability; advanced materials and structures; harsh applications

Published Papers
  • Dynamic Mechanical Behavior and Numerical Simulation of an Ancient Underground Rock Mass under Impact Loading
  • Abstract To study the dynamic mechanical properties of tuff under different environmental conditions, the tuff from an ancient quarry in Shepan Island was prepared. The impact damage to the rock was tested using a triaxial dynamic impact mechanical testing system (TDIMTS) with different ground stresses, temperatures, and groundwater pressures. The time-strain relationship, dynamic stress-strain relationship, energy dissipation law, energy-peak strain relationship, and the impact damage pattern of the tuff specimens under impact air pressures were investigated. The TDIMTS experiment on ancient underground rock mass under impact loading was also simulated using the finite element analysis software LS-DYNA based on the Holmquist-Johnson-Cook… More
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  • A Hybrid Regional Model for Predicting Ground Deformation Induced by Large-Section Tunnel Excavation
  • Abstract Due to the large number of finite element mesh generated, it is difficult to use full-scale model to simulate largesection underground engineering, especially considering the coupling effect. A regional model is attempted to achieve this simulation. A variable boundary condition method for hybrid regional model is proposed to realize the numerical simulation of large-section tunnel construction. Accordingly, the balance of initial ground stress under asymmetric boundary conditions achieves by applying boundary conditions step by step with secondary development of Dynaflow scripts, which is the key issue of variable boundary condition method implementation. In this paper, Gongbei tunnel based on hybrid… More
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  • Image Reconstruction for ECT under Compressed Sensing Framework Based on an Overcomplete Dictionary
  • Abstract Electrical capacitance tomography (ECT) has great application potential in multiphase process monitoring, and its visualization results are of great significance for studying the changes in two-phase flow in closed environments. In this paper, compressed sensing (CS) theory based on dictionary learning is introduced to the inverse problem of ECT, and the K-SVD algorithm is used to learn the overcomplete dictionary to establish a nonlinear mapping between observed capacitance and sparse space. Because the trained overcomplete dictionary has the property to match few features of interest in the reconstructed image of ECT, it is not necessary to rely on the sparsity… More
  •   Views:410       Downloads:354        Download PDF

  • Numerical and Experimental Investigations of the Thermal Fatigue Lifetime of CBGA Packages
  • Abstract A thermal fatigue lifetime prediction model of ceramic ball grid array (CBGA) packages is proposed based on the Darveaux model. A finite element model of the CBGA packages is established, and the Anand model is used to describe the viscoplasticity of the CBGA solder. The average viscoplastic strain energy density increment ΔWave of the CBGA packages is obtained using a finite element simulation, and the influence of different structural parameters on the ΔWave is analyzed. A simplified analytical model of the ΔWave is established using the simulation data. The thermal fatigue lifetime of CBGA packages is obtained from a thermal… More
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  • Reliability Analysis for Retaining Pile in Foundation Pit Based on Bayesian Principle
  • Abstract Moso bamboo has the advantages of high short-term strength and reproducibility, appropriating for temporary supporting structure of shallow foundation pit. According to the displacement of the pile top from an indoor model test, the reliability of the supporting effect of the moso bamboo pile was analyzed. First, the calculation formula of reliability index was deduced based on the mean-value first-order second-moment (MVFOSM)method and probability theory under ultimate limit state and serviceability limit state. Then, the dimensionless bias factor (the ratio of the measured value to the calculated value) was introduced to normalize the displacement. The mathematical characteristics of the displacement… More
  •   Views:463       Downloads:366        Download PDF