Mechanics Research Communications最新文献

{"title":"Inverse magnetostrictive properties of twisted Fe–Co alloy wire","authors":"Hiroki Kurita,&nbsp;Zhenjin Wang,&nbsp;Fumio Narita","doi":"10.1016/j.mechrescom.2025.104467","DOIUrl":"10.1016/j.mechrescom.2025.104467","url":null,"abstract":"<div><div>One of the challenges of magnetostrictive energy harvesting materials is their low power generation performance. We hypothesized that twisting promotes easy movement of the magnetic wall during the magnetization process and improves the magnetostrictive properties of Fe–Co alloy wire. This study evaluated the inverse magnetostrictive properties of twisted Fe–Co alloy wires and the Fe–Co alloy wire integrated epoxy resin matrix composites using free and forced vibration and compressive tests. Contrary to the initial hypothesis, it was found that twisting relieves the residual stress introduced during the drawing of Fe-Co wires. This stress relief is believed to contribute to the improvement in permeability and magnetostriction. While annealing offers similar benefits, the simpler twisting process presents a promising alternative.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104467"},"PeriodicalIF":1.9,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Laser ultrasonic detection of defects in a regular tetrahedral lattice structure based on finite element modeling","authors":"Yibo Ren,&nbsp;Xuzhi Fu,&nbsp;Jinping Zhang,&nbsp;Yueyang Zhang,&nbsp;Yu Zhan","doi":"10.1016/j.mechrescom.2025.104466","DOIUrl":"10.1016/j.mechrescom.2025.104466","url":null,"abstract":"<div><div>Lattice structures possess advantages such as ultra-lightweight, high strength, and high stiffness. However, they often exhibit defects during manufacture and service. Due to the complexity of their structure, detecting these defects can be challenging. Laser ultrasonic technology has emerged as a promising detection method, particularly suited for lattice structures. In this paper, a regular tetrahedral lattice structure model is established, and the finite element method is employed to analyze the propagation characteristics of laser-induced ultrasonic waves within the structure and investigate the impact of various defect types on these ultrasonic waves. Firstly, the thermodynamic coupling model for laser-induced ultrasonic waves in the lattice structure is established and the propagation rules of ultrasonic waves at different locations is discussed. Secondly, the models for different types of lattice structure defects are created and the effects of defect location and depth on ultrasonic wave propagation are analyzed. The results indicate that the modes of ultrasonic wave propagation in the upper sandwich plate are shear wave, longitudinal wave, and Rayleigh wave, while the ultrasonic wave propagation on the surface of the support rod is characterized as longitudinal wave. When the defect is present on the support rod, positioning the probe points directly above the defect on the support rod proves to be highly effective for detection. Furthermore, when cracks occur at the junction between the support rod and the upper sandwich plate, distinct reflected wave can be observed on the upper surface of the upper sandwich plate. Additionally, as the depth of the crack increases, the amplitude of the reflected wave progressively rises, exhibiting a nonlinear trend.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104466"},"PeriodicalIF":1.9,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Longitudinal wave propagation in coupled triple-layer mass–spring chains: Discrete and continuum models","authors":"E. Ghavanloo","doi":"10.1016/j.mechrescom.2025.104446","DOIUrl":"10.1016/j.mechrescom.2025.104446","url":null,"abstract":"<div><div>Wave propagation in coupled triple-layer mass–spring chains is investigated through discrete and continuum modeling approaches to address the underexplored dynamics of multilayered systems. A discrete model is formulated using Newton’s second law, and Bloch’s theorem is applied to obtain the dispersion relation. Complementing the discrete analysis, continuum approximations are developed using standard Taylor series expansions (up to sixth-order) and a non-standard Padé-based approach. Numerical comparisons demonstrate that the non-standard model achieves good accuracy across a broad frequency spectrum, while higher-order standard models (sixth-order) offer excellent improvements at the cost of complexity.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104446"},"PeriodicalIF":1.9,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fracture energy regularization for the numerical modelling of concrete structures with recycled aggregate: An application with an UMAT user subroutine for ABAQUS","authors":"M. Zitouni ,&nbsp;M.R.T. Arruda","doi":"10.1016/j.mechrescom.2025.104463","DOIUrl":"10.1016/j.mechrescom.2025.104463","url":null,"abstract":"<div><div>This paper investigates the application of a new concrete damage model for the numerical simulation of recycled aggregate concrete (RAC) structures. The proposed model incorporates fracture energy regularization for tensile and compressive behaviour in Mode I, addressing mesh dependency issues common in finite element (FE) analyses. Using the ABAQUS FE software, the damage model was implemented via a UMAT user subroutine developed in Fortran 90. The accuracy of the numerical model was evaluated by comparing its results with experimental data from previous studies, focusing on structural responses, cracking patterns, and the estimation of tensile and compressive fracture energy for concrete with recycled aggregates in structural members. The findings from the simulation of two classical concrete benchmark tests, conducted on concretes with different percentages of recycled aggregates, validate the adopted material properties for future applications.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104463"},"PeriodicalIF":1.9,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An FFT-based micromechanical model for gradient enhanced brittle fracture","authors":"Miroslav Zecevic","doi":"10.1016/j.mechrescom.2025.104455","DOIUrl":"10.1016/j.mechrescom.2025.104455","url":null,"abstract":"<div><div>Damage models incorporated within FFT-based micromechanical methods have received much attention recently because of the need to better understand and predict brittle and ductile fracture. An important aspect of a damage model is non-local regularization, which removes the mesh dependence of the predictions that otherwise become physically unacceptable upon grid refinement. In this work, the Helmholtz-type equation for non-local gradient regularization of a damage model on a distorted grid is solved using an FFT-based approach. The resulting system of equations is solved using the Jacobi iterative method. The model is applied to simulate brittle fracture of an intermetallic. The influence of the time and space discretization, the length-scale parameter, and intermetallic crystallographic orientation on crack evolution is studied.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104455"},"PeriodicalIF":1.9,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mesoscale damage analysis of UHTCC under seawater dry-wet cycles using particle flow theory","authors":"Ruiqing Chang ,&nbsp;Zhanyou Yan ,&nbsp;Li Zhao ,&nbsp;Shuo Xu ,&nbsp;Xiya Zhao ,&nbsp;Yiqing Yan","doi":"10.1016/j.mechrescom.2025.104456","DOIUrl":"10.1016/j.mechrescom.2025.104456","url":null,"abstract":"<div><div>This study investigates the effects of seawater dry-wet cycling on the dynamic compressive properties of Ultra-High Toughness Cementitious Composites (UHTCC) using a discrete element model developed with Particle Flow Code (PFC2D). Five sets of controlled laboratory dynamic compression tests with varying dry-wet cycles were conducted alongside numerical simulations to examine force chain evolution, crack propagation, and acoustic emission characteristics at the mesoscale level. Results demonstrate good agreement between numerical simulations and experimental data. The peak stress of UHTCC exhibited a non-monotonic response to increasing dry-wet cycles, initially rising before declining after reaching its maximum at 90 days. Acoustic emission events showed strong correlation with crack development, where increased crack density corresponded to higher signal intensity and event frequency. The developed discrete element model successfully captured the complete internal fracture process at microscopic scales, demonstrating its effectiveness for analyzing complex mechanical behaviors in cementitious composites.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104456"},"PeriodicalIF":1.9,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of photothermal and photoacoustic waves of thermally shocked microtemperature semiconductor materials","authors":"Shreen El-Sapa ,&nbsp;Alaa A. El-Bary ,&nbsp;Khaled Lotfy ,&nbsp;Tarek E.I. Nassar","doi":"10.1016/j.mechrescom.2025.104454","DOIUrl":"10.1016/j.mechrescom.2025.104454","url":null,"abstract":"<div><div>Photothermal (PT) and photoacoustic (PA) processes are two closely related phenomena that occur in semiconductor materials that are exposed to light energy or optical beam absorption and surface recombination in and on the sample. These phenomena have been studied in semiconductor materials because they have important applications in various sectors, including renewable energy and sensing. The elastic and thermal problem in one dimension is solved by adding photothermal excitation and photoacoustic waves on the free surface of a semi-infinite semiconducting medium. The governing equations of the problem under the influence of a microtemperature field are solved using the integral transform technique. The inverse Laplace method is used to solve the mathematical problem. Temperature, acoustic pressure, elastic and mechanical distributions, microtemperature and heat flux distributions, and carrier density diffusion are all physical parameters that can be determined from the mathematical model's numerical solutions. The numerical results obtained from several comparisons are discussed and illustrated graphically. The most significant result indicates that microtemperature effects and photogenerated carrier lifetimes greatly influence semiconductor media's thermal and elastic wave behavior, which is crucial for microstructure-based photothermal design.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104454"},"PeriodicalIF":1.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the 〈111〉, 〈110〉, and 〈001〉 slip directions of the B2 intermetallic by way of anisotropic elasticity theory","authors":"Justin A. Mayer ,&nbsp;Irene J. Beyerlein","doi":"10.1016/j.mechrescom.2025.104436","DOIUrl":"10.1016/j.mechrescom.2025.104436","url":null,"abstract":"<div><div>Based on anisotropic elasticity theory, general expressions for the fault width as a function of character angle, fault energy, and the direction and magnitude of the partials that form the fault, are developed for the <span><math><mrow><mrow><mo>〈</mo><mn>111</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>110</mn><mo>}</mo></mrow></mrow></math></span>, <span><math><mrow><mrow><mo>〈</mo><mn>110</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>110</mn><mo>}</mo></mrow></mrow></math></span>, and <span><math><mrow><mrow><mo>〈</mo><mn>001</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>110</mn><mo>}</mo></mrow></mrow></math></span> slip systems of the <span><math><mrow><mi>B</mi><mn>2</mn></mrow></math></span> intermetallic. Ultimately, we find that only <span><math><mrow><mrow><mo>〈</mo><mn>111</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>110</mn><mo>}</mo></mrow></mrow></math></span> form well defined partials, while <span><math><mrow><mrow><mo>〈</mo><mn>110</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>110</mn><mo>}</mo></mrow></mrow></math></span> and <span><math><mrow><mrow><mo>〈</mo><mn>001</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>110</mn><mo>}</mo></mrow></mrow></math></span> dislocations remain diffuse. Additionally, for almost all <span><math><mrow><mi>B</mi><mn>2</mn></mrow></math></span> intermetallics studied here, the behavior of the fault widths as a function of character angle deviates significantly from isotropic elasticity theory. Based on these findings, line energy calculations are also performed, and the relative importance of the <span><math><mrow><mrow><mo>〈</mo><mn>111</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>110</mn><mo>}</mo></mrow></mrow></math></span>, <span><math><mrow><mrow><mo>〈</mo><mn>110</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>110</mn><mo>}</mo></mrow></mrow></math></span>, and <span><math><mrow><mrow><mo>〈</mo><mn>001</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>110</mn><mo>}</mo></mrow></mrow></math></span> slip systems within the family of <span><math><mrow><mi>B</mi><mn>2</mn></mrow></math></span> intermetallics are discussed.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104436"},"PeriodicalIF":1.9,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deformable tubes with various cross sectional shapes: Geometric and rheological properties","authors":"Mustafa Turkyilmazoglu","doi":"10.1016/j.mechrescom.2025.104435","DOIUrl":"10.1016/j.mechrescom.2025.104435","url":null,"abstract":"<div><div>Pipes play crucial roles in rheology analysis, aiding us in understanding and predicting the behavior of various real-world flows. This study focuses on mathematically representable tubular shapes with non-circular cross-sections, controlled by four key parameters that define their form. By varying these parameters, we introduce a versatile collection of deformable pipes distinct from the traditional circular or elliptical ones commonly studied. Here, we derive an analytical formula that characterizes the topological nature and velocity profiles within these diverse shapes. Subsequently, we explore the streamlines and wall shears experienced along their surfaces. We then delve into a detailed analysis of crucial geometric parameters such as cross-sectional area, perimeter, volumetric flow rate, and Poiseuille number, encompassing a wide range of pipe shapes, from oval to hexagonal. Notably, a subset of the explored pipes features collapsible hyperbolic profiles, particularly relevant in engineering applications involving the transport of biochemical substances.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"147 ","pages":"Article 104435"},"PeriodicalIF":1.9,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the bending problem of a polar linearly elastic cantilever","authors":"K.P. Soldatos","doi":"10.1016/j.mechrescom.2025.104448","DOIUrl":"10.1016/j.mechrescom.2025.104448","url":null,"abstract":"<div><div>This communication aims to initiate an investigation regarding the linearly elastic bending response of a cantilevered bar that exhibits features of polar material behaviour, while it may also be influenced by anisotropy features that are due to fibre presence. The existing exact elasticity solution of the bending problem of a corresponding isotropic cantilever is currently confined within the bounds of the non-polar linear elasticity, and refers only to the stress analysis part of the problem. Complete solution of that problem still requires determination of the corresponding displacement field, which depends on the shape of the bar cross-section and is also needed for the solution of the considered polar material version of the problem. Accordingly, the present part of this investigation initially extends the existing non-polar elasticity solution by including material symmetries that represent the class of material orthotropy, and completes it by determining the corresponding displacement field for an orthotropic cantilever with circular cross-section. In the special case of material isotropy, it then achieves to complete the corresponding non-polar elasticity solution, by (i) providing the relevant displacement field, and (ii) studying the bending response of the corresponding isotropic polar material cantilever. Nevertheless, substantial similar progress is also made in a case of polar transverse isotropy, where polar material response of a bent cantilever bar is anticipated due to a family of embedded fibres that possess bending stiffness.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"147 ","pages":"Article 104448"},"PeriodicalIF":1.9,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144184358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}