Mechanics of Time-Dependent Materials最新文献_第3页

Effect of gas pressure on the creep and seepage characteristics of low permeability coal 瓦斯压力对低透气性煤的蠕变和渗流特性的影响

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-06-17 DOI: 10.1007/s11043-024-09718-z

Xiangchun Li, Jianhua Zeng, Yaoyu Shi, Shuhao Zhang, Xiaowei Li, Yuzhen Long, Rong Liu, Liang Zhang

{"title":"Effect of gas pressure on the creep and seepage characteristics of low permeability coal","authors":"Xiangchun Li, Jianhua Zeng, Yaoyu Shi, Shuhao Zhang, Xiaowei Li, Yuzhen Long, Rong Liu, Liang Zhang","doi":"10.1007/s11043-024-09718-z","DOIUrl":"10.1007/s11043-024-09718-z","url":null,"abstract":"<div><p>Coal, as a complex gas-bearing medium, exhibits unique rheological behavior under mining disturbance. However, with increasing mining depth, the creep and seepage mechanisms of low permeability coal remain unclear. Therefore, to investigate the coupled relationship between creep and gas seepage in low permeability coal, time-dependent triaxial experiments were conducted in this study. To consider the effects of gas, a modified creep model based on the Nishihara creep model was developed and validated by numerical simulations and experimental results. The correlation between coal creep and seepage was then analyzed under different gas pressure conditions, showing a significant reduction in Young’s modulus during creep. This reduction indicates a strong correlation between creep and gas seepage, which is supported by the agreement between creep strain and permeability curves. In addition, the results show a significant attenuation effect in the seepage process at different gas pressures due to pore pressure and adsorption. It is worth noting that unlike conventional soft coal, no permeability reduction was observed in the initial stage due to the low permeability and stiffness of the coal. And it was shown that the presence of methane accelerated the creep behavior of the coal, resulting in a decrease in permeability. Overall, this study provides important insights into the rheological behavior of low-permeability coal under mining disturbance and sheds light on the mechanisms governing gas seepage in coal.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"28 3","pages":"1003 - 1018"},"PeriodicalIF":2.1,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonlinear static/transient behaviors of CNT-reinforced magnetoelectromechanical smart plates and shells considering agglomeration via a dual-director shell model 通过双向壳模型考虑集聚的 CNT 增强磁机电智能板和壳的非线性静态/瞬态行为

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-06-11 DOI: 10.1007/s11043-024-09716-1

H. Mallek, H. Mellouli, R. Louhichi, F. Dammak

{"title":"Nonlinear static/transient behaviors of CNT-reinforced magnetoelectromechanical smart plates and shells considering agglomeration via a dual-director shell model","authors":"H. Mallek, H. Mellouli, R. Louhichi, F. Dammak","doi":"10.1007/s11043-024-09716-1","DOIUrl":"10.1007/s11043-024-09716-1","url":null,"abstract":"<div><p>The application of piezomagnetic layers on the external surfaces of passive sandwich shells has the potential to create multifunctional smart sandwich structures. This work introduces new, smart magnetoelectroelastic (MEE) shells and studies their geometrically nonlinear bending and transient behavior as a first endeavor. A High-order Shear Deformation Theory (HSDT) is adopted to develop the Finite-Element model of the smart MEE shells considering the multiphysics couplings, meanwhile the Lagrangian nonlinear strain–displacement relations are employed to account for the geometric nonlinearity. The developed FE is modeled with nodal degrees of freedom that include displacements, rotations, and electric and magnetic potentials. Moreover, the physical characteristics of aggregated CNTRC are evaluated based on a micromechanics model incorporating the two agglomeration parameters. Different agglomeration schemas are considered for CNTs in the nanocomposite core layer. The precision and reliability of the current FE model are confirmed through a comparison of the existing results in the open literature. The study explores the influence of parameters such as CNT volume fraction and their agglomeration phenomena and various geometrical parameters of the shell on the nonlinear bending and dynamic behavior of smart MEE sandwich structures. The findings provide valuable insights into the subject.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"28 3","pages":"1685 - 1718"},"PeriodicalIF":2.1,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141359266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental characterization and stochastic models for time-dependent rupture of thin-ply composite laminates 薄层复合材料层压板随时间变化的断裂实验特征和随机模型

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-06-10 DOI: 10.1007/s11043-024-09714-3

Uba K. Ubamanyu, Sergio Pellegrino

引用次数: 0

Investigating reflection phenomenon of plane waves in a fractional order thermoelastic rotating medium using nonlocal theory 用非局部理论研究分数阶热弹性旋转介质中平面波的反射现象

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-06-10 DOI: 10.1007/s11043-024-09709-0

Muhammad Jamal, Farhat Bibi, Ehtsham Azhar, Hashmat Ali

引用次数: 0

Constitutive modeling of viscoelastic-plastic strain characteristics and damage in southern China red sandstone under chemical exposure 化学暴露下中国南方红砂岩的粘弹-塑性应变特征和损伤的构造模型

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-06-10 DOI: 10.1007/s11043-024-09708-1

Shuguang Zhang, Shutian Zhao, Mingzhuo Fan, Ye Sun, Wenbo Liu, Wenhao Qi

{"title":"Constitutive modeling of viscoelastic-plastic strain characteristics and damage in southern China red sandstone under chemical exposure","authors":"Shuguang Zhang, Shutian Zhao, Mingzhuo Fan, Ye Sun, Wenbo Liu, Wenhao Qi","doi":"10.1007/s11043-024-09708-1","DOIUrl":"10.1007/s11043-024-09708-1","url":null,"abstract":"<div><p>In this investigation, we conducted graded creep cyclic loading and unloading testing to measure the viscoelastic-plastic rheological properties of red sandstone from Southern China under acidic conditions. We utilized an enhanced method to divide the strain into four components: instantaneous elastic strain, instantaneous plastic strain, viscoelastic strain, and viscoplastic strain. We analyzed the strain characteristics of the corroded samples in relation to the deformation modulus. Employing nonlinear rheological theory, we derived the constitutive equations for creep damage in rock under both one-dimensional and three-dimensional stress states. Our findings indicate that acid corrosion has a minimal impact on the resistance to elastic deformation in red sandstone, with the elastic deformation modulus remaining relatively unchanged at comparable stress levels. The relationships between instantaneous elastic strain and viscoelastic strain with deviatoric stress are nearly linear. Increased acidity enhances the plastic deformation of the sandstone, marked by a progressive increase in the instantaneous plastic modulus and a decrease in instantaneous plastic strain increments with successive loading and unloading cycles. The viscoplastic modulus decreases as stress levels rise, leading to increased viscoplastic strain. Incorporating a chemical damage variable that accounts for plastic deformation, we established a creep damage constitutive equation that separates viscoelastic-plastic strains. The validity and accuracy of our proposed model are confirmed through comparison with the traditional Nishihara model.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"28 4","pages":"3005 - 3028"},"PeriodicalIF":2.1,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141361777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative characterization of the viscoelastic properties of additive manufacturing polymers 增材制造聚合物粘弹性能的比较表征

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-06-07 DOI: 10.1007/s11043-024-09710-7

Anil Singh, Mia Chen, George Youssef

{"title":"Comparative characterization of the viscoelastic properties of additive manufacturing polymers","authors":"Anil Singh, Mia Chen, George Youssef","doi":"10.1007/s11043-024-09710-7","DOIUrl":"10.1007/s11043-024-09710-7","url":null,"abstract":"<div><p>The recent availability of a wide range of additively manufactured materials has facilitated the translation from prototype-limited to application-ready 3D printed components. As such, additively manufactured materials deployed in dynamic environments require extensive characterization to elucidate and optimize performance. This research evaluates the dynamic response of fused filament fabrication and vat photopolymerization printed polymers as a function of temperature. Dynamic mechanical analysis is used to extract the viscoelastic properties of several generations of samples exhibiting a range of thermomechanical behavior, highlighting the stiffness and damping characteristics. A modified stiffness–temperature model supports the experimental characterization and provides additional insight concerning the molecular motion occurring over each thermal transition. The insights from the analysis were collated into a case study that leverages their dynamic characteristics in a multimaterial application. The outcomes from this research assimilate a framework that defines the temperature operating range and broadens the design envelope for these additive manufacturing materials.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"28 4","pages":"3029 - 3047"},"PeriodicalIF":2.1,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141374639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Memory response of porous cylindrical panels with voids in the framework of three-phase-lag theory 三相滞后理论框架下带有空隙的多孔圆柱形面板的记忆响应

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-06-07 DOI: 10.1007/s11043-024-09717-0

Kirti K. Jojare, Kishor R. Gaikwad

{"title":"Memory response of porous cylindrical panels with voids in the framework of three-phase-lag theory","authors":"Kirti K. Jojare, Kishor R. Gaikwad","doi":"10.1007/s11043-024-09717-0","DOIUrl":"10.1007/s11043-024-09717-0","url":null,"abstract":"<div><p>This article explores the memory effects of a three-dimensional cylindrical panel with a void using the Three-Phase-Lag (3PL) theory. The study derives the governing equations for displacement, temperature, void volume fraction, and stress. These equations are solved using Fourier–Laplace transforms and eigenvalue methods. To obtain numerical solutions and generate graphical representations, the transformed equations were inverted. Material properties from Gauthier’s work were used, and graphical results were produced using Mathematica software. The influence of memory response is then demonstrated by comparing kernel functions and time delay parameters within the 3PL porous cylindrical panel. The results show significant changes in the behavior of the panel. The validity of the proposed model is confirmed by comparing its predictions with previously published findings. The authors believe these results can provide valuable insights for various engineering applications involving porous materials. The model allows for accurate prediction of material behavior under different loading conditions, leading to a deeper understanding of various kernel phenomena.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"28 3","pages":"709 - 736"},"PeriodicalIF":2.1,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141371344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of strain rate on nanoparticle debonding in polymer nanocomposites 应变率对聚合物纳米复合材料中纳米颗粒脱粘的影响

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-06-05 DOI: 10.1007/s11043-024-09713-4

Afshin Zeinedini

{"title":"Influence of strain rate on nanoparticle debonding in polymer nanocomposites","authors":"Afshin Zeinedini","doi":"10.1007/s11043-024-09713-4","DOIUrl":"10.1007/s11043-024-09713-4","url":null,"abstract":"<div><p>This paper attempts to evaluate the influence of strain rate on the debonding stress of the spherical nanoparticles using a closed form solution. A coherent model to correlate a relationship between the debonding stress of polymer-based nanocomposites and the strain rate was developed. A representative volume element (RVE) containing a spherical nanoparticle, an interphase material, and a pure polymer phase was regarded. A relationship between the debonding stress and the applied strain rate, the material, and geometrical properties of the RVE’s constituents was correlated. In addition to the strain rate, the role of some effective variables such as nanoparticles size, interphase thickness, and interphase stiffness on the debonding stress were investigated. To evaluate the model, three case studies based on the experimental studies performed on silica nanoparticles/epoxy, CaCO<sub>3</sub> nanoparticles/high-density polyethylene (HDPE), silica nanoparticles/photopolymer nanocomposites were conducted. For the nano-silica/epoxy system, the results revealed that by enhancing the strain rate, the normalized debonding stress decreases. Additionally, under a certain strain rate, the normalized debonding stress enhances as much as the stiffness of interphase material increases and the nanoparticle size decreases. In the case of CaCO<sub>3</sub>/HDPE nanocomposites, it was observed that by increasing the size of nanoparticles, the normalized debonding stress was reduced significantly. For the nano-silica/photopolymer nanocomposites, it was found that the dependence of the normalized debonding stress on the strain rate is more remarkable for the thicker interphase region. The proposed model can be used to predict the mechanical properties of nanoparticles/polymer systems under high strain rate conditions.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"28 4","pages":"3069 - 3091"},"PeriodicalIF":2.1,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141385686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics of nonlocal fractional magneto-thermoviscoelastic waves in a micro-rod heated by a moving heat source 被移动热源加热的微棒中的非局部分数磁热动弹性波的特征

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-06-04 DOI: 10.1007/s11043-024-09701-8

A. Alansari

引用次数: 0

Effect of pile-head breaking methods on the triaxial creep behavior of a concrete: a constitutive modeling approach 桩头破除方法对混凝土三轴徐变行为的影响：构成模型方法

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-06-04 DOI: 10.1007/s11043-024-09690-8

Haikuan Wu, Hangqi Zhang, Shun Kang, Xin Zhang, Yongyi Yang, Xudong Yang, Rongxi Shen, Baoxian Liu, Xun Yuan, Zhile Shu

{"title":"Effect of pile-head breaking methods on the triaxial creep behavior of a concrete: a constitutive modeling approach","authors":"Haikuan Wu, Hangqi Zhang, Shun Kang, Xin Zhang, Yongyi Yang, Xudong Yang, Rongxi Shen, Baoxian Liu, Xun Yuan, Zhile Shu","doi":"10.1007/s11043-024-09690-8","DOIUrl":"10.1007/s11043-024-09690-8","url":null,"abstract":"<div><p>This study investigated the long-term creep behavior of concrete in drilled shafts using conventional and soft-cutting head techniques, focusing on their propensity for internal defects and crack propagation under sustained loading. Triaxial creep tests were performed on concrete specimens subjected to multistage loading to examine the axial- and radial-creep responses associated with each cutting-head method. The findings reveal that concrete prepared with conventional cutting heads exhibits a higher susceptibility to creep failure, attributed to an increased presence of internal defects. In contrast, specimens using soft-cutting heads demonstrated reduced axial- and radial-creep deformations. Concrete cured in laboratory conditions and those cut with soft-cutting heads at various elevations predominantly experienced shearing failures, whereas specimens with soft-cutting heads positioned at higher elevations were more prone to radial tension-shear failures. Considering the Burgers model and fractional-order theory, we introduce a one-dimensional nonlinear damage creep model, alongside a more comprehensive three-dimensional damage creep model. Validation of these models confirms their effectiveness in describing the creep behavior of concrete under different cutting-head disturbances. Importantly, our analysis suggests that the role of soft-cutting head methods on the integrity of cast-in-place concrete piles is comparatively minimal. This insight underscores the potential for optimizing pile-head breaking techniques to mitigate creep-related failures in concrete structures.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"28 4","pages":"2793 - 2817"},"PeriodicalIF":2.1,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0