Journal of Thermal Stresses最新文献_第10页

Thermal analysis model correction method based on Latin hypercube sampling and coordinate rotation method 基于拉丁超立方采样和坐标旋转法的热分析模型校正方法

IF 2.8 3区工程技术

Journal of Thermal Stresses Pub Date : 2023-07-10 DOI: 10.1080/01495739.2023.2219284

Shijun Li, Liheng Chen, Shuai Liu

{"title":"Thermal analysis model correction method based on Latin hypercube sampling and coordinate rotation method","authors":"Shijun Li, Liheng Chen, Shuai Liu","doi":"10.1080/01495739.2023.2219284","DOIUrl":"https://doi.org/10.1080/01495739.2023.2219284","url":null,"abstract":"Abstract To predict on-orbit temperatures of the spacecraft accurately, a correction method for the thermal analysis model is proposed that combines Latin hypercube sampling and the coordinate rotation method. First, the thermal design parameters to be corrected are determined. Second, the thermal design parameters are sampled by the Latin hypercube sampling, and the sampling results inputted to the I-deas/TMG software for the thermal simulation calculation. Then according to the results of thermal simulation, the thermal design parameters are classified using the Spearman rank correlation coefficient formula, as either global sensitive parameters, local sensitive parameters, or insensitive parameters. Finally, according to the layered correction idea, the above parameters are corrected by the coordinate rotation method to find the optimal solution that satisfies the objective function. After the correction, the maximum temperature difference between the thermal simulation and the thermal balance test for each temperature measurement point is less than 1 °C for high-temperature conditions, and a maximum temperature difference of less than 2 °C for low-temperature condition.","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"46 1","pages":"857 - 870"},"PeriodicalIF":2.8,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46016199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An efficient meshfree framework for simulation of crack tip stress fields in two-dimensional graded media subjected to thermoelastic loads 热弹性载荷作用下二维梯度介质裂纹尖端应力场模拟的有效无网格框架

IF 2.8 3区工程技术

Journal of Thermal Stresses Pub Date : 2023-07-10 DOI: 10.1080/01495739.2023.2224413

Ayush Awasthi, M. Pant

{"title":"An efficient meshfree framework for simulation of crack tip stress fields in two-dimensional graded media subjected to thermoelastic loads","authors":"Ayush Awasthi, M. Pant","doi":"10.1080/01495739.2023.2224413","DOIUrl":"https://doi.org/10.1080/01495739.2023.2224413","url":null,"abstract":"Abstract In the present work a novel framework of algorithm has been proposed for enhancing the versatility of the element-free Galerkin method for modeling of fracture in graded media subjected to thermoelastic loadings. The proposed work restructures the conventional element free Galerkin method (EFGM) at multiple level through generic MATLAB algorithms thereby developing an efficient and robust method for simulating crack tip stress fields in graded material subjected to thermoelastic loads. The proposed algorithm utilizes varying nodal density criterion in conjunction with optimum Gaussian quadrature around these nodes for numerical integration of the governing equations. The proposed algorithm also incorporates blended approximation which is effective for simulating crack tip stress fields in both convex and non-convex problem domains. Nonequilibrium formulation has been selected for evaluating stress intensity factors (SIFs) for the fracture problems in graded media. A few problems of cracked domain subjected to thermoelastic loads have been modeled and simulated to illustrate the effectiveness of proposed framework of algorithms. Further, three component level problems having non-convex domains have also been discussed to establish the robustness and modeling capabilities of the proposed work. A good agreement between the simulated results and reference data demonstrates the algorithm’s competence and robustness for modeling thermoelastic fracture in graded materials. The proposed methodology improves the computational efficiency and flexibility of the element-free Galerkin method for modeling thermoelastic fracture in graded media. Moreover, enhancement of computing speed with the proposed methodology adds to its modeling potential.","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"46 1","pages":"949 - 984"},"PeriodicalIF":2.8,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47880292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of higher modes of Rayleigh-type waves in fiber-piezo thermoelastic composite structure 纤维-压电热弹性复合材料结构中瑞利波高阶模态分析

IF 2.8 3区工程技术

Journal of Thermal Stresses Pub Date : 2023-06-23 DOI: 10.1080/01495739.2023.2221315

J. Baroi, S. A. Sahu

引用次数: 1

Multifactorial Distress, the Warburg Effect, and Respiratory and pH Imbalance in Cancer Development 癌症发展中的多因子窘迫、Warburg效应、呼吸和pH失衡

IF 2.8 3区工程技术

Journal of Thermal Stresses Pub Date : 2023-06-18 DOI: 10.3390/stresses3020036

G. Drochioiu

引用次数: 0

Stochastic collocation method for thermal buckling and vibration analysis of functionally graded sandwich microplates 功能梯度夹层微型板热屈曲和振动分析的随机配置法

IF 2.8 3区工程技术

Journal of Thermal Stresses Pub Date : 2023-06-14 DOI: 10.1080/01495739.2023.2217243

Van-Thien Tran, T. Nguyen, P. Nguyen, T. Vo

引用次数: 0

Do equal speed condition and exponential stability relate for the truncated thermoelastic Timoshenko system under Green Naghdi law? Green-Naghdi定律下截断热弹性Timoshenko系统的等速度条件和指数稳定性有关系吗？

IF 2.8 3区工程技术

Journal of Thermal Stresses Pub Date : 2023-06-14 DOI: 10.1080/01495739.2023.2217233

Hamza Zougheib, T. El Arwadi, Rodrigo L. R. Madureira, M. Rincon

{"title":"Do equal speed condition and exponential stability relate for the truncated thermoelastic Timoshenko system under Green Naghdi law?","authors":"Hamza Zougheib, T. El Arwadi, Rodrigo L. R. Madureira, M. Rincon","doi":"10.1080/01495739.2023.2217233","DOIUrl":"https://doi.org/10.1080/01495739.2023.2217233","url":null,"abstract":"Abstract Over the years, the stabilization Timoshenko systems with dissipative features have piqued the interest of researchers. The study of Timoshenko systems under various damping effects has resulted in a significant number of studies. When nonphysical assumptions of equal wave velocities are used in stabilization, the expected exponential decay of the energy solution is attained in all recent research. In this study, we analyze a one-dimensional thermooelastic Timoshenko type system in the setting of the second frequency spectrum, where the assumption of equal wave speed is not required for exponential decay to occur. In fact, According to Elishakoff’s studies [Elishakoff, Advances in Mathematical Modeling and Experimental Methods for Materials and Structures: The Jacob Aboudi Volume, Dordrecht, The Netherlands: Springer, pp. 249–254, 2009.], we consider the so-called truncated version of the Timoshenko system, and we added a thermoelastic damping according to Green Naghdi law of heat conduction. We first use Faedo–Galerkin approximation to verify the system’s global well-posedness. Using a Lyapunov functional we establish an exponential stability without assuming the condition of equal wave speed. A numerical scheme is introduced and analyzed. Finally, assuming extra regularity on the solution, we get some a priori error estimates and we present some numerical results which demonstrate the exponential behavior of the solution. This result significantly improves the previous results in the literature in which equal wave velocities are used to obtain exponential stability.","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"46 1","pages":"673 - 705"},"PeriodicalIF":2.8,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41762813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Stress singularity of one-dimensional hexagonal piezoelectric quasicrystal composites due to thermal effect 一维六方压电准晶复合材料热效应的应力奇异性

IF 2.8 3区工程技术

Journal of Thermal Stresses Pub Date : 2023-06-12 DOI: 10.1080/01495739.2023.2221313

Xiang Mu, Xiaoyu Fu, Z. Zhu, Liangliang Zhang, Yang Gao

引用次数: 0

Surface-to-Volume Ratio Affects the Toxicity of Nanoinks in Daphnids 表面体积比影响纳米油墨对水蚤的毒性

IF 2.8 3区工程技术

Journal of Thermal Stresses Pub Date : 2023-06-07 DOI: 10.3390/stresses3020035

Dimitrios Kakavas, K. Panagiotidis, K. Rochfort, K. Grintzalis

{"title":"Surface-to-Volume Ratio Affects the Toxicity of Nanoinks in Daphnids","authors":"Dimitrios Kakavas, K. Panagiotidis, K. Rochfort, K. Grintzalis","doi":"10.3390/stresses3020035","DOIUrl":"https://doi.org/10.3390/stresses3020035","url":null,"abstract":"The Organization for Economic Co-operation and Development (OECD) has set widely used guidelines that are used as a standardized approach for assessing toxicity in a number of species. Given that various studies use different experimental setups, it is difficult to compare findings across them as a result of the lack of a universally used setup in nano-ecotoxicology. For freshwater species, Daphnia magna, a commonly used filter feeding crustacean, can generate significant molecular information in response to pollutant exposure. One factor that has an effect in toxicity induced from nanomaterials in daphnids is the surface-to-volume ratio of the exposure vessels; however, there is limited information available about its impact on the observed effect of exposure. In this study, daphnids were exposed to silver nanoparticle ink in falcon tubes and Petri dishes for 24 h. Toxicity curves revealed differences in the observed mortality of daphnids, with animals exposed in Petri dishes displaying significantly higher mortality. Differences in the activities of a number of key enzymes involved in the catabolism of macromolecules and phosphate were also observed across the exposure setups, indicating possible differences in the toxicity mechanism of silver nano-ink. Understanding the impact of factors relevant to experimental setups in ecotoxicology can increase the reproducibility of testing, and also reduce experimental costs, time, generated waste, and daphnids used in research.","PeriodicalId":54759,"journal":{"name":"Journal of Thermal Stresses","volume":"14 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90834839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of a strain-gradient problem arising in MGT thermoelasticity MGT热弹性中应变梯度问题分析

IF 2.8 3区工程技术

Journal of Thermal Stresses Pub Date : 2023-05-31 DOI: 10.1080/01495739.2023.2211632

N. Bazarra, José R. Fernández, R. Quintanilla

引用次数: 1

Transient hygrothermal response of an infinite solid cylinder with internal heat generation 具有内热产生的无限固体圆柱体的瞬态湿热响应

IF 2.8 3区工程技术

Journal of Thermal Stresses Pub Date : 2023-05-26 DOI: 10.1080/01495739.2023.2208186

Tasneem Firdous Islam, G. D. Kedar, S. Anwar

引用次数: 1