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  • Open Access


    A Coupled Hygro-Thermo-Mechanical Bond-Based Cosserat Peridynamic Porous Media Model for Heated Fracture of Concrete

    Jiaming Zhang1, Xihua Chu1,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.26, No.3, pp. 1-2, 2023, DOI:10.32604/icces.2023.09055

    Abstract This paper presents a fully coupled hygro-thermo-mechanical bond-based Cosserat peridynamic porous media model for concrete at high temperature [1-3]. The model enables the problem of Poisson's ratio limitation to be relieved and the effect of cement particle size and its independent micro-rotation to be taken into account [4]. A multi-rate explicit integration strategy is proposed, which allows this complex multi-field fully coupled governing equation to be well solved. Numerical simulations mainly focus on the terms of temperature, water vapour pressure and damage level to verify the validity of the model [5-9]. And they additionally demonstrate More >

  • Open Access


    Concurrent Topology and Fiber Path Optimization for Continuous Fiber Composite Under Thermo-Mechanical Loadings

    Zhelong He1,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.26, No.1, pp. 1-1, 2023, DOI:10.32604/icces.2023.010452

    Abstract This presentation introduces a concurrent topology and fiber-path optimization for continuous fiber composite under thermos-mechanical loadings. The optimization goal is to minimize the structural compliance of composite with thermos-mechanical coupling while satisfying volume fraction constraint, and ensuring the manufacturability by using continuous fibers and avoiding the appearance of over thin members. Level-set function is utilized to represent both shape boundary and fiber path. The zero isocontour of level-set function is updated using a shape sensitivity analysis for anisotropic composite, and fiber paths in shape are given by level-set functions determined from shape boundary. A level-set-based… More >

  • Open Access


    Topology Optimization of Stiffener Layout Design for Box Type Load-Bearing Component under Thermo-Mechanical Coupling

    Zhaohui Yang1,2,*, Tianhua Xiong1, Fei Du1,*, Baotong Li3

    CMES-Computer Modeling in Engineering & Sciences, Vol.135, No.2, pp. 1701-1718, 2023, DOI:10.32604/cmes.2023.022758

    Abstract The structure optimization design under thermo-mechanical coupling is a difficult problem in the topology optimization field. An adaptive growth algorithm has become a more effective approach for structural topology optimization. This paper proposed a topology optimization method by an adaptive growth algorithm for the stiffener layout design of box type load-bearing components under thermo-mechanical coupling. Based on the stiffness diffusion theory, both the load stiffness matrix and the heat conduction stiffness matrix of the stiffener are spread at the same time to make sure the stiffener grows freely and obtain an optimal stiffener layout design.… More >

  • Open Access


    Thermo-Mechanical Analysis of the Sealing Performance of a Diesel-Engine Cylinder Gasket

    Xulan Wang1,*, Zezhong Chen1, Changzhen Liu1, Wei Ren2, Bo Wu1, Shude Ji1, Xiaofei Chen1, Shijie Wen1, Yonggang Hao1

    FDMP-Fluid Dynamics & Materials Processing, Vol.17, No.4, pp. 821-831, 2021, DOI:10.32604/fdmp.2021.014707

    Abstract Taking the combustor composite structure of a high-strength diesel engine as the main research object, dedicated tests have been conducted to verify the accuracy of three distinct cylinder gasket pressure simulation models. Using the measured cylinder gasket compression rebound curve, a gasket unit has been designed and manufactured. For this unit, the influence of the bolt pretension, cylinder body and cylinder head material on gasket sealing pressure has been investigated systematically in conditions of thermo-mechanical coupling. The results show that the bolt pretension force is one of the most important factors affecting the cylinder gasket More >

  • Open Access


    Prediction of Melt Pool Dimension and Residual Stress Evolution with Thermodynamically-Consistent Phase Field and Consolidation Models during Re-Melting Process of SLM

    Kang-Hyun Lee1, Gun Jin Yun1,2,*

    CMC-Computers, Materials & Continua, Vol.66, No.1, pp. 87-112, 2021, DOI:10.32604/cmc.2020.012688

    Abstract Re-melting process has been utilized to mitigate the residual stress level in the selective laser melting (SLM) process in recent years. However, the complex consolidation mechanism of powder and the different material behavior after the first laser melting hinder the direct implementation of the re-melting process. In this work, the effects of re-melting on the temperature and residual stress evolution in the SLM process are investigated using a thermo-mechanically coupled finite element model. The degree of consolidation is incorporated in the energy balance equation based on the thermodynamically-consistent phase-field approach. The drastic change of material… More >

  • Open Access


    Mechanical Characterisation of Densified Hardwood with Regard to Structural Applications

    Katharina Müller1,*, Walter Sonderegger2, Oliver Kläusler2, Michael Klippel1, Edwin Zea Escamilla3,4

    Journal of Renewable Materials, Vol.8, No.9, pp. 1091-1109, 2020, DOI:10.32604/jrm.2020.09483

    Abstract The demand for high-performance, yet eco-friendly materials is increasing on all scales from small applications in the car industry, instrument or furniture manufacturing to greater dimensions like floorings, balcony furnishings and even construction. Wood offers a good choice on all of these scales and can be modified and improved in many different ways. In this study, two common European hardwood species, Beech (Fagus sylvatica L.) and Ash (Fraxinus excelsior L.) were densified in radial direction by thermo-mechanical treatment and the densified product was investigated in an extensive characterisation series to determine all relevant mechanical properties. Compression in… More >

  • Open Access


    Effect of Weld Properties on the Thermo-Mechanical Structural Analysis of Prototype Process Heat Exchanger

    K.N. Song1

    Structural Durability & Health Monitoring, Vol.8, No.3, pp. 209-222, 2012, DOI:10.32604/sdhm.2012.008.209

    Abstract A PHE (Process Heat Exchanger) is a key component in transferring the high temperature heat generated from a VHTR (Very High Temperature Reactor) to the chemical reaction for the massive production of hydrogen. A performance test on a small-scale PHE prototype made of Hastelloy-X is currently under way a small-scale gas loop at the Korea Atomic Energy Research Institute. Previous research on the elastic high-temperature structural analysis of the small-scale PHE prototype has been performed using the parent material properties over the whole region. In this study, an elastic-plastic high-temperature structural analysis considering the mechanical More >

  • Open Access


    A numerical study of centre crack under thermo-mechanical load using EFGM

    Mohit Pant1, I. V. Singh1, B. K. Mishra1

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.1, pp. 13-22, 2009, DOI:10.3970/icces.2009.012.013

    Abstract In this work, element free Galerkin method (EFGM) has been used to obtain the solution of centre crack problem under thermo-mechanical loads as it provides a versatile technique to model static as well as moving crack problems without any requirement of re-meshing. Diffraction criterion has been used to model crack geometry. The effect of crack orientation of centre crack has been studied under both mechanical and equivalent thermal loading under plane stress conditions. The values of mode-I and mode-II stress intensity factors have been evaluated by the interaction integral approach. More >

  • Open Access


    Poly (Butylene Adipate-Co-Terephthalate) and Poly (Ɛ-Caprolactone) and Their Bionanocomposites with Cellulose Nanocrystals: Thermo-Mechanical Properties and Cell Viability Study

    Marcia Cristina Branciforti1,*, Caroline Faria Bellani2, Carolina Lipparelli Morelli2, Alice Ferrand3, Nadia Benkirane-Jessel3, Rosario Elida Suman Bretas2

    Journal of Renewable Materials, Vol.7, No.3, pp. 269-277, 2019, DOI:10.32604/jrm.2019.01833

    Abstract Although nanocomposites have recently attracted special interest in the tissue engineering area, due to their potential to reinforce scaffolds for hard tissues applications, a number of variables must be set prior to any clinical application. This manuscript addresses the evaluation of thermo-mechanical properties and of cell proliferation of cellulose nanocrystals (CNC), poly(butylene adipate-co-terephthalate) (PBAT), poly(ε-caprolactone) (PCL) films and their bionanocomposites with 2 wt% of CNC obtained by casting technique. Cellulose nanocrystals extracted from Balsa wood by acid hydrolysis were used as a reinforcing phase in PBAT and PCL matrix films. The films and pure CNC… More >

  • Open Access


    Multi-pass Medium Plate Rolling Processes Using Thermo-mechanical FE Analysis

    Hai-liang YU1, Xiang-hua LIU1, Ying ZHI1

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.1, pp. 75-76, 2009, DOI:10.3970/icces.2009.009.075

    Abstract Material properties and geometrical shape of rolled products are two of the most important problems in steel product, which are affected by the thermal distribution and deformation behavior during rolling. Analysis of the behavior of medium plate during multi-pass rolling is significant for guiding the production.

    Recently years, the finite element method (FEM) has been widely used for analyzing the plate rolling processes, which has become an irreplaceable theory method. Rolling processes is a kind of continuous metal forming technology. Through multi-pass rolling processes, the shape and microstructure of plate could be obtained. However, in mostly… More >

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