Forces in mechanics最新文献_第5页

Phase-field modelings of fracture investigate the influence of interfacial effects on damage and optimal material distribution in brittle inclusion-matrix structures 断裂相场建模研究界面效应对脆性包含基体结构中损伤和最佳材料分布的影响

IF 3.2

Forces in mechanics Pub Date : 2024-08-01 DOI: 10.1016/j.finmec.2024.100282

Ba-Thanh Vu, Tien-Thanh Bui, Ngoc-Long Nguyen, The-Truyen Tran, Xuan-Lam Nguyen, Viet-Hai Hoang

{"title":"Phase-field modelings of fracture investigate the influence of interfacial effects on damage and optimal material distribution in brittle inclusion-matrix structures","authors":"Ba-Thanh Vu, Tien-Thanh Bui, Ngoc-Long Nguyen, The-Truyen Tran, Xuan-Lam Nguyen, Viet-Hai Hoang","doi":"10.1016/j.finmec.2024.100282","DOIUrl":"10.1016/j.finmec.2024.100282","url":null,"abstract":"<div><p>This present work uses the phase-field modelings to investigate the influence of interfacial effects on damage and mechanical behavior, as well as the optimal distribution of the inclusion shape within brittle inclusion-matrix structures in various typical cases. These two constituent phases in the structures are assumed to be either isotropic or anisotropic. To achieve these goals, this work will: (i) use the phase-field modelings either considering or neglecting interfacial debonding, and the anisotropic phase-field modeling; (ii) determine and incorporate the strain tensor orthogonal decompositions into each specific phase-field modeling to enhance the accuracy and effectiveness of the simulation methods; (iii) combine the phase-field modelings with the BESO topology optimization algorithm to analyze the influence of interfacial effects on relationship curves and the optimal distribution of the inclusion shape. Through proposed numerical examples, it is demonstrated that the interfacial effects strongly influence crack paths, behavior curves, and optimal material distribution in structures. When considering interfacial effects, cracks are almost unable to penetrate into the inclusion phase. However, when neglecting interfacial effects, cracks propagate into the inclusion phase. This reason makes the structure more difficult to damage than when considering the interfacial effects, as evidenced by greater peak load values in behavior curves and greater total fracture resistance of the material. Especially in the example of inclusion phase optimization, the total fracture resistance value of the case neglecting interfacial effects is more than 107.9% greater than that considering interfacial effects.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"16 ","pages":"Article 100282"},"PeriodicalIF":3.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666359724000283/pdfft?md5=1163fa0ec72a95ce19e73ea19f57b26f&pid=1-s2.0-S2666359724000283-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141963082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crack growth in sandwich-structured foam core graphite epoxy laminate composite using a phase-field modelling approach 采用相场建模方法研究夹层结构泡沫芯材石墨环氧层压复合材料的裂纹生长情况

IF 3.2

Forces in mechanics Pub Date : 2024-08-01 DOI: 10.1016/j.finmec.2024.100284

Manish Singh Rajput, Himanshu Pathak

{"title":"Crack growth in sandwich-structured foam core graphite epoxy laminate composite using a phase-field modelling approach","authors":"Manish Singh Rajput, Himanshu Pathak","doi":"10.1016/j.finmec.2024.100284","DOIUrl":"10.1016/j.finmec.2024.100284","url":null,"abstract":"<div><p>The laminated sandwich composites have wide structure-making applications in the automotive and aviation fields due to their lightweight and superior flexural rigidity properties. Making grooves or holes to assemble more than one structure induces crack discontinuities near the stress concentration region in these sandwich structures. The present work examines the effect of crack discontinuities on the mechanical performance and failure process of the sandwich structures under different loading conditions. Phase field method (PFM) has been presented and implemented using in-house developed MATLAB code. The effect of holes, multiple cracks, number of cores, and loading conditions are analyzed for the mechanical and fracture behavior of the structure. Load-carrying capacity, threshold displacement value for crack initiation, crack propagation trajectory, and energy absorption capacity are compared for various crack discontinuities under different loading conditions. Approximately 35% increase in load carrying capacity is observed in equivalent multiple core sandwich structures.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"16 ","pages":"Article 100284"},"PeriodicalIF":3.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666359724000301/pdfft?md5=2e0c64f9b887eece81f6844eca94fc0a&pid=1-s2.0-S2666359724000301-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141998149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mass minimization approach for the optimal preliminary design of CMC inner liners in rocket thrust chambers 火箭推进室厘米级内衬最佳初步设计的质量最小化方法

IF 3.2

Forces in mechanics Pub Date : 2024-08-01 DOI: 10.1016/j.finmec.2024.100281

Valentino Paolo Berardi , Nicola Meola , Michele Ferraiuolo

{"title":"Mass minimization approach for the optimal preliminary design of CMC inner liners in rocket thrust chambers","authors":"Valentino Paolo Berardi , Nicola Meola , Michele Ferraiuolo","doi":"10.1016/j.finmec.2024.100281","DOIUrl":"10.1016/j.finmec.2024.100281","url":null,"abstract":"<div><p>In the past decade, the world has witnessed a new space race, driven by a growing commitment to reducing the environmental impact of space missions. This has led to the widespread adoption of liquid-propellant rocket engines, which offer several advantages over their solid-propellant counterparts. One key advantage is their reusability, which not only helps to reduce the generation of space debris but also makes space exploration cheaper. To further enhance the performance of liquid rocket engines, researchers have been exploring innovative cooling techniques and advanced materials. Among these materials, Ceramic Matrix Composites (CMCs) have shown great potential in reducing the overall engine weight when used instead of high-tech metal alloys, resulting in lower fuel consumption and emissions during launches. This paper focuses on the mass minimization of inner liners made of CMCs in rocket thrust chambers. At this aim, a computationally efficient preliminary design approach, based on an analytical one-dimensional thermo-mechanical model, is proposed. A case study of mass minimization of an inner liner of rocket thrust chamber is also presented and discussed, by considering five different CMC materials.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"16 ","pages":"Article 100281"},"PeriodicalIF":3.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666359724000271/pdfft?md5=4c8924a5b361051e14c7fdef11599a9c&pid=1-s2.0-S2666359724000271-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141844342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mobile rolling robots designed to overcome obstacles: A review 旨在克服障碍的移动滚动机器人：综述

IF 3.2

Forces in mechanics Pub Date : 2024-08-01 DOI: 10.1016/j.finmec.2024.100283

Jesús M. García, Franklyn G. Duarte

{"title":"Mobile rolling robots designed to overcome obstacles: A review","authors":"Jesús M. García, Franklyn G. Duarte","doi":"10.1016/j.finmec.2024.100283","DOIUrl":"10.1016/j.finmec.2024.100283","url":null,"abstract":"<div><p>Ground mobile robots operating in outdoor environments face multiple challenges, being overcoming obstacles on uneven terrain a prominent one. This challenging task has been addressed by numerous researchers who have developed robots employing various strategies, all aimed at efficiently overcoming increasingly higher obstacles. This article describes 108 robots designed for this purpose, incorporating the principle of rolling for locomotion and obstacle overcoming. These robots have been categorized into six major groups based on their operating principle and strategy for overcoming obstacles. After conducting a meticulous review and comparison, it has been determined that both the definition of the strategy robot will use to overcome an obstacle and the optimized robot design from the early stages of its development through clearly established requirements are the elements that hold the greatest significance in enabling a mobile robot to efficiently overcome an obstacle. In this regard, specific requirements and parameters have been identified that must be considered in the design of the robot to fulfill its purpose. Among these, key considerations include dimensional optimization, robustness, adaptability, energy efficiency, sensory capability, and appropriate navigability.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"16 ","pages":"Article 100283"},"PeriodicalIF":3.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666359724000295/pdfft?md5=d5094b4086c233db372f50678949d465&pid=1-s2.0-S2666359724000295-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142012478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling 3D finite element analysis of a semi-elliptical crack on stress corrosion cracking of API X52 pipeline API X52 管道应力腐蚀开裂半椭圆形裂纹的 3D 有限元建模分析

IF 3.2

Forces in mechanics Pub Date : 2024-06-20 DOI: 10.1016/j.finmec.2024.100279

G. Terán , S. Capula-Colindres , J.C. Velázquez , M.A. Zuñiga-Hinojosa , A. Contreras

{"title":"Modeling 3D finite element analysis of a semi-elliptical crack on stress corrosion cracking of API X52 pipeline","authors":"G. Terán , S. Capula-Colindres , J.C. Velázquez , M.A. Zuñiga-Hinojosa , A. Contreras","doi":"10.1016/j.finmec.2024.100279","DOIUrl":"https://doi.org/10.1016/j.finmec.2024.100279","url":null,"abstract":"<div><p>In this study, an external semi-elliptical crack was modeled in a 3D API 5 L X52 pipeline with stress corrosion cracking (SCC). To make the crack, the finite element method (FEM) was used to obtain the failure pressure (P<sub>f</sub>) and its mechanical behavior. The longitudinal crack had a constant length (2c) and varied with depth (a). The properties of X52 steel subjected to SCC using the slow strain rate technique (SSRT) were considered. True stress-strain curves were obtained in air and in an NS4 solution with pHs of 3.5 and 9.5 at temperatures of 25 and 50 °C. According to the SCC index calculated from the mechanical properties of the SSRT, the X52 steel is susceptible to SCC at pH 3.5 and 50 °C. The mechanical properties of the tensile test using the stress-strain curves decreased as the pH and temperature changed, compared to those carried out at room temperature. This was due to the corrosion and hydrogen embrittlement produced by the solution on the X52 steel. The failure pressure is sensitive to the stress-strain curve; if the stress-strain curve decreases, the failure pressure also decreases. Corrosion defects, such as longitudinal cracks in X52 steel, which could be susceptible to SCC in an NS4 solution, decrease the failure pressure (P<sub>f</sub>) and its capacity to withstand pressures of up to 75 % in pipe-grade steel that transports hydrocarbons.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"16 ","pages":"Article 100279"},"PeriodicalIF":3.2,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666359724000258/pdfft?md5=68a591603be5ba5c51d4f220fe94b92e&pid=1-s2.0-S2666359724000258-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141487332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coupled thermo-mechanical analysis of creep in a rotating FGMEE annular plate under complex thermal loading considering solar radiation, convection, and internal heat source 考虑太阳辐射、对流和内部热源的复杂热负荷下旋转 FGMEE 环形板蠕变的热力学耦合分析

IF 3.2

Forces in mechanics Pub Date : 2024-06-17 DOI: 10.1016/j.finmec.2024.100277

M. Saadatfar, M.A. Babazadeh, M. Babaelahi

{"title":"Coupled thermo-mechanical analysis of creep in a rotating FGMEE annular plate under complex thermal loading considering solar radiation, convection, and internal heat source","authors":"M. Saadatfar, M.A. Babazadeh, M. Babaelahi","doi":"10.1016/j.finmec.2024.100277","DOIUrl":"https://doi.org/10.1016/j.finmec.2024.100277","url":null,"abstract":"<div><p>In this analysis, the creep responses of a non-constant thickness annular plate was presented. The material of disc is assumed functionally graded magneto-electro-elastic (FGMEE) in which the material properties change through the radius. Also, the heat transfer coefficients for convection and conduction are functions of radius and temperature. At first, the equation of heat transfer accounting for thermal gradient, convection boundary conditions, internal heat generation, and solar radiation effects was derived. The differential transformation method (DTM) was used to solve the resulting nonlinear differential equation. The equilibrium equation for the annular plate including creep strain effects was then obtained. Ignoring creep strains, an analytical solution was obtained for the zero-time of this equation. Then, creep strains were introduced using Norton's law and the Prandtl-Reuss relations to find the stress and strain rates under fixed temperature boundary conditions. Next, the equation of strain rates including creep strains was solved analytically. Finally, an iterative approach was used to evaluate the time-dependent redistribution of creep stresses at any time point. Numerical examples highlighted the influences of key parameters like internal heat generation, convective heat transfer, grading index, solar radiation, thickness profile, and angular speed on the stresses, deformations and electric and magnetic potentials.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"16 ","pages":"Article 100277"},"PeriodicalIF":3.2,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666359724000234/pdfft?md5=d8e135eb3eb9ad5ba4a1741883faca93&pid=1-s2.0-S2666359724000234-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141434645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of accelerated moving load on dynamic response of FG Timoshenko nanobeam in thermal environment based on nonlocal strain gradient theory 基于非局部应变梯度理论的加速运动载荷对热环境中 FG Timoshenko 纳米梁动态响应的影响研究

IF 3.2

Forces in mechanics Pub Date : 2024-06-17 DOI: 10.1016/j.finmec.2024.100280

Mohammadreza Eghbali , Seyed Amirhosein Hosseini

{"title":"Investigation of accelerated moving load on dynamic response of FG Timoshenko nanobeam in thermal environment based on nonlocal strain gradient theory","authors":"Mohammadreza Eghbali , Seyed Amirhosein Hosseini","doi":"10.1016/j.finmec.2024.100280","DOIUrl":"https://doi.org/10.1016/j.finmec.2024.100280","url":null,"abstract":"<div><p>For the first time, this paper investigates the forced vibrations of a functionally graded (FG) nanobeam with an accelerating moving load in a thermal environment. There is no exact coupling solution for the vibrations of nanobeam with an accelerated moving load, so this paper aims to provide a method to obtain an accurate solution for nanoscale structures with an accelerated moving load. The equations of motion are derived using Timoshenko's beam theory and the nonlocal strain gradient theory (NSGT). The Laplace method has been used to solve the coupling and exact differential equations. Then, by inverting Laplace from the coupled equations, an exact solution of the temporal response for FG nanobeam with constant acceleration and initial velocity in a thermal environment was obtained. The natural frequency was compared with previous works for validity and had acceptable results. Finally, the effect of parameters such as changes in acceleration and velocity of moving force, negative acceleration, power law index of FG material, different temperatures, nonlocal parameter, and longitudinal scale parameter on the maximum dynamic displacement of nanobeam is investigated. These results can be used better to design FG nanostructures with accelerated moving loads. Considering the sensitivity of data analysis in nano dimensions, it is necessary to provide an analytical solution method in these dimensions to reduce the error percentage in nano dimensions to zero. which is presented in this work for the first time.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"16 ","pages":"Article 100280"},"PeriodicalIF":3.2,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266635972400026X/pdfft?md5=a149fd22f7686aa18120fb8677f88108&pid=1-s2.0-S266635972400026X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141434644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical behavior of X60 pipelines containing pitting corrosion defects based on finite element method 基于有限元法的含有点状腐蚀缺陷的 X60 管道的机械性能

Forces in mechanics Pub Date : 2024-06-16 DOI: 10.1016/j.finmec.2024.100278

S. Capula-Colindres , G. Terán , J.C. Velázquez , A. Caballero-Rosas , E. Torres-Santillán , D. Angeles-Herrera

引用次数: 0

Numerical-experimental study on the crashworthiness of a windshield A-pillar 挡风玻璃 A 柱耐撞性数值实验研究

Forces in mechanics Pub Date : 2024-05-01 DOI: 10.1016/j.finmec.2024.100273

Enrico Armentani , Michele Perrella , Massimiliano Cepollaro , Fulvio Cepollaro , Giuseppe D'Errico , Venanzio Giannella

引用次数: 0

Optimal cut-off frequency and controller gain of an integrated skyhook active isolation 集成式 Skyhook 有源隔离装置的最佳截止频率和控制器增益

Forces in mechanics Pub Date : 2024-05-01 DOI: 10.1016/j.finmec.2024.100272

La Duc Viet , Phan Thi Tra My , Nguyen Tuan Ngoc

引用次数: 0