Forces in mechanics最新文献

Impact dynamics of mechanical metamaterials: A short review and perspective 机械超材料的冲击动力学：综述与展望

IF 3.5

Forces in mechanics Pub Date : 2025-10-03 DOI: 10.1016/j.finmec.2025.100335

Chuanqing Chen , Yulong He , Yuli Chen , Guoxing Lu , Ming-Hui Lu , Xin Li

引用次数: 0

Axially crashworthy performance of thin-walled tubes with various configurations under the same scale 相同尺度下不同结构薄壁管的轴向耐撞性能

IF 3.5

Forces in mechanics Pub Date : 2025-09-27 DOI: 10.1016/j.finmec.2025.100334

Qingliang Zeng , Zhaoji Li , Peng Liu , Naihao Gong , Lirong Wan

{"title":"Axially crashworthy performance of thin-walled tubes with various configurations under the same scale","authors":"Qingliang Zeng , Zhaoji Li , Peng Liu , Naihao Gong , Lirong Wan","doi":"10.1016/j.finmec.2025.100334","DOIUrl":"10.1016/j.finmec.2025.100334","url":null,"abstract":"<div><div>Thin-walled tubes with various design strategies as energy absorbers have been widely proposed and applied in the engineering fields. However, the comparison of the crashworthy performance of tubes with various cross-sectional topologies under axial compression remains scarce. In this paper, twelve types of thin-walled tubes (e.g., single-celled, bi-tubular and hierarchical square, hexagonal and circular tubes), which have the identical material, height, apparent area and mass, have been fairly compared. Validation is accomplished through axial quasi-static crushing tests, ensuring the accuracy of the finite element models. The crushing behaviors of all tubes studied are investigated using six crashworthiness indicators. The results show that thin-walled tubes with hierarchical features primarily deform in the preferrable stable deformation mode, with more lobes and higher energy dissipation. Then, hierarchical features can reduce the fluctuations and enhance the load-carrying capacity. In addition, the mean crushing force (<em>MCF</em>) and specific energy absorption (<em>SEA</em>) of bi-tubular tubes also do not increase significantly compared with single-celled tubes. Specifically, the increases in <em>SEA</em> from square tubes to circular tubes for single-celled, bi-tubular and edge-based hierarchical are 65.4 %, 75.0 % and 49.6 %, respectively. Furthermore, all tubes studied are comprehensively evaluated by applying the technique for order preference by similarity to an ideal solution (TOPSIS) method. Considering the effect of dimension, four non-dimensional indicators are selected, namely <em>ESR, EEA, CFE</em> and <em>ULC</em>. EH_C has the best overall performance among all the tubes studied.</div></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"21 ","pages":"Article 100334"},"PeriodicalIF":3.5,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of stress state on the fracture behavior of Al6061-T6 via combined experimental and numerical approaches 试验与数值结合研究应力状态对Al6061-T6断裂行为的影响

IF 3.5

Forces in mechanics Pub Date : 2025-09-23 DOI: 10.1016/j.finmec.2025.100332

Mohsen Mansouri, Mehdi Ganjiani

{"title":"Effect of stress state on the fracture behavior of Al6061-T6 via combined experimental and numerical approaches","authors":"Mohsen Mansouri, Mehdi Ganjiani","doi":"10.1016/j.finmec.2025.100332","DOIUrl":"10.1016/j.finmec.2025.100332","url":null,"abstract":"<div><div>This study presents an experimental and numerical investigation into the influence of stress triaxiality, Lode angle parameter, and ductile fracture behavior in Al 6061-T6 aluminum alloy. To explore negative stress triaxiality conditions, uniaxial tensile and compressive tests were conducted on geometrically tailored specimens, including dumbbell-shaped and rectangular samples with elliptical curved holes. Negative triaxiality values ranging from –0.355 to –0.554 were successfully achieved. A hybrid experimental–numerical approach was adopted to characterize the fracture behavior. In the numerical approach, the Ganjiani fracture model incorporating damage parameters, was implemented in finite element simulations using Abaqus via custom VUHARD and VUSDFLD subroutines. Comparative analysis of experimental and numerical results revealed good agreement in fracture strain predictions. Numerical evaluations indicated that the fracture occurs at the site where maximum plastic strain is observed. The results confirm that stress triaxiality significantly influences ductile fracture, and notably, the variation in fracture strain exhibits different trends under positive and negative triaxiality conditions.</div></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"21 ","pages":"Article 100332"},"PeriodicalIF":3.5,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The conversion between thermal snap-through and bifurcation instabilities of metal foam sandwich beams by refined first-order shear theory 用精细一阶剪切理论研究泡沫金属夹层梁热透失稳与分岔失稳的转换

IF 3.5

Forces in mechanics Pub Date : 2025-09-14 DOI: 10.1016/j.finmec.2025.100331

Ying-long Zhao , Chao Fu , Hong-yao Zeng , Qiang Lyu , Neng-hui Zhang

{"title":"The conversion between thermal snap-through and bifurcation instabilities of metal foam sandwich beams by refined first-order shear theory","authors":"Ying-long Zhao , Chao Fu , Hong-yao Zeng , Qiang Lyu , Neng-hui Zhang","doi":"10.1016/j.finmec.2025.100331","DOIUrl":"10.1016/j.finmec.2025.100331","url":null,"abstract":"<div><div>The bending, vibration, and buckling of metal foam structures under thermal loads have consistently attracted significant interest in various engineering applications. However, most theoretical models rely on numerical results, which obscure connections between the system parameters and the system response, and the thermal instability type of metal foam structures has not been clarified. This paper aims to investigates the instability type of metal foam sandwich beams under various temperature fields. The analysis incorporates three models for porosity distribution and two scenarios for temperature fields. Firstly, a nonlinear governing equation for metal foam sandwich beams under uniform and linear temperature fields is formulated by using refined first-order shear theory, Von Karman geometric nonlinearity, and the concept of physical neutral plane. Secondly, an analytical solution to the nonlinear integral-differential boundary value problem for metal foam sandwich beams is obtained by using the Nayfeh’s semi-inverse solution method. Finally, the instability type, post-buckling paths, and corresponding mechanism of metal foam sandwich beams are predicted by the analytical solution and free energy evaluation, respectively. The results indicate that the clamped-supported (C<img>C) metal foam sandwich beam will experience bifurcation instability; however, the instability type of the simply-supported (S-S) metal foam sandwich beam transitions from bifurcation instability to snap-through as the pore distribution and temperature fields vary. Furthermore, the buckling resistance of metal foam sandwich beams can be substantially improved through meticulous optimization of material parameters. These findings are anticipated to provide novel insights and valuable references for the design and regulation of metal foam structures.</div></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"21 ","pages":"Article 100331"},"PeriodicalIF":3.5,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Free vibration analysis of rectangular plates with variable thickness using a meshless method 用无网格法分析变厚度矩形板的自由振动

IF 3.5

Forces in mechanics Pub Date : 2025-08-21 DOI: 10.1016/j.finmec.2025.100328

Reza Pilafkan , Peter D. Folkow

{"title":"Free vibration analysis of rectangular plates with variable thickness using a meshless method","authors":"Reza Pilafkan , Peter D. Folkow","doi":"10.1016/j.finmec.2025.100328","DOIUrl":"10.1016/j.finmec.2025.100328","url":null,"abstract":"<div><div>This paper presents a comprehensive study on the free vibration analysis of rectangular plates with variable thickness, utilizing three-dimensional elasticity theory and a meshless method. Traditional plate theories, such as classical and shear deformation theories, often fail to provide accurate results for thick plates or those with complex geometries. To overcome these limitations, the study adopts the three-dimensional elasticity approach, which considers the full material behavior and the entire plate structure. The meshless method, specifically the Radial Point Interpolation Method (RPIM) with multi-quadrics radial basis functions, is employed to solve the vibration problem. This method offers advantages over traditional finite element methods by using scattered nodes and higher-order shape functions, thus eliminating issues related to meshing and re-meshing. The plates’ thickness is assumed to vary linearly and nonlinearly in one or both directions in the plate plane, and the study investigates the impact of different thickness ratios, aspect ratios, and boundary conditions on the natural frequencies of the plate. The results show that the meshless method provides a high degree of accuracy and fast convergence for both thin and thick plates with variable thickness, making it a reliable and efficient tool for free vibration analysis. This work thus contributes with valuable insights to the dynamic behavior of variable-thickness plates, with applications in many engineering fields where weight reduction and structural performance are critical. The work also provides eigenfrequency results on several plate structures with varying thickness, which may serve as a reference using 3D theory.</div></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"21 ","pages":"Article 100328"},"PeriodicalIF":3.5,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144908194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The spall damage of Al at ultra-high strain rates: A combination of MD simulation and mechanical modelling 超高应变速率下Al的剥落损伤：MD模拟与力学建模的结合

IF 3.5

Forces in mechanics Pub Date : 2025-08-01 DOI: 10.1016/j.finmec.2025.100326

Fuqi Zhao , Tingting Zhou , Anmin He , Pei Wang

{"title":"The spall damage of Al at ultra-high strain rates: A combination of MD simulation and mechanical modelling","authors":"Fuqi Zhao , Tingting Zhou , Anmin He , Pei Wang","doi":"10.1016/j.finmec.2025.100326","DOIUrl":"10.1016/j.finmec.2025.100326","url":null,"abstract":"<div><div>Molecular dynamics (MD) and mechanical modelling simulations were used to investigate the dynamic fracture mechanism and damage evolution in single crystal aluminium subjected to shock loadings. MD simulations of shock induced spalling were performed to investigate the effect of strain rate. It is discovered that as the strain rate increases, the critical stress for damage activation, the rate of damage development, and the spall strength increase, whereas the width of the damage region decreases. The time evolution of the void volume fraction obtained from MD simulations was then used to determine the parameters of several theoretical models, including the nucleation-and-growth (NAG) model and Kanel’s model. Coupled with the theoretical models and verified parameters, the one-dimensional finite element method (1-D FEM) was used to perform mechanical modelings of spallation under shock loadings. The calculated results, including the time evolutions of stress, free surface velocity, and the density distribution of the damage region, agree with the MD data. We believe that this study could shed light on the studies of spall damage under conditions of ultra-high strain rates.</div></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"20 ","pages":"Article 100326"},"PeriodicalIF":3.5,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144826803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ratcheting behavior of pressurized 316L austenitic stainless steel pipe tee under cyclic bending using DIC method 加压316L奥氏体不锈钢三通管在DIC循环弯曲下的棘轮行为

IF 3.5

Forces in mechanics Pub Date : 2025-08-01 DOI: 10.1016/j.finmec.2025.100325

Ali Shahrjerdi, Faezeh Nazari

引用次数: 0

Evaluation of high-cycle bending fatigue properties and fracture behaviors in AM60 magnesium alloy joints by friction welding AM60镁合金摩擦焊接接头高周弯曲疲劳性能及断裂行为评价

IF 3.5

Forces in mechanics Pub Date : 2025-08-01 DOI: 10.1016/j.finmec.2025.100327

Ali Dadashi, Amin Asghaie, Mohammad Azadi

{"title":"Evaluation of high-cycle bending fatigue properties and fracture behaviors in AM60 magnesium alloy joints by friction welding","authors":"Ali Dadashi, Amin Asghaie, Mohammad Azadi","doi":"10.1016/j.finmec.2025.100327","DOIUrl":"10.1016/j.finmec.2025.100327","url":null,"abstract":"<div><div>This study examines the microstructural and fatigue properties of AM60 magnesium alloy joints produced by rotary friction welding (RFW). Optical microscopy reveals significant microstructural changes, including grain refinement, reorientation of intermetallic phases, and redistribution of Mg<sub>17</sub>Al<sub>12</sub> particles. The weld metal shows a dispersed needle-like intermetallic structure, while the heat-affected zone (HAZ) accumulates intermetallic phases at grain boundaries. Microhardness analysis indicates a high hardness value of 92.1 Hv at the weld interface, decreasing towards the base metal (BM) with hardness values between 50–60 Hv. Fatigue behavior studies demonstrate that higher interface angles reduce fatigue lifetime, with the 42° conical specimen showing the best performance. Fractography reveals a transgranular quasi-cleavage fracture mode, with cracks nucleating at the weld interface. Additionally, regression analysis was performed, and the suggested model was well-fitted. The study underscores the complex interplay of welding parameters, microstructure, and mechanical properties, offering insights for optimizing welding processes to enhance fatigue resistance of welded magnesium alloy joints.</div></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"20 ","pages":"Article 100327"},"PeriodicalIF":3.5,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bending deformation of polyethylene solid 聚乙烯固体的弯曲变形

IF 3.2

Forces in mechanics Pub Date : 2025-07-17 DOI: 10.1016/j.finmec.2025.100324

Koh-hei Nitta, Sakina Tatsuta

引用次数: 0

Experimental and numerical investigation of diagonally reinforced 3D-architected polymer honeycomb lattice structures fabricated via FDM using PLA 聚乳酸FDM制备斜向增强三维聚合物蜂窝晶格结构的实验与数值研究

IF 3.2

Forces in mechanics Pub Date : 2025-07-13 DOI: 10.1016/j.finmec.2025.100322

Vigneshwaran Karupaiah , Venkateshwaran Narayanan , Elif Kaynak , Vigneshwaran Shanmugam , Oisik Das

{"title":"Experimental and numerical investigation of diagonally reinforced 3D-architected polymer honeycomb lattice structures fabricated via FDM using PLA","authors":"Vigneshwaran Karupaiah , Venkateshwaran Narayanan , Elif Kaynak , Vigneshwaran Shanmugam , Oisik Das","doi":"10.1016/j.finmec.2025.100322","DOIUrl":"10.1016/j.finmec.2025.100322","url":null,"abstract":"<div><div>This study introduces a novel hexagonal honeycomb lattice design incorporating integrated diagonal struts, developed to enhance compression strength and energy absorption in 3D-printed polymer structures. Five distinct lattice configurations were fabricated using polylactic acid (PLA) filament and evaluated through uniaxial compression testing. The results showed that Lattice 5, which features a hexagonal unit cell with diagonal struts from top left to bottom right, had the highest compression strength of 45.78 MPa and absorbed 14,406 J of energy. In comparison, Lattice 1, with a regular hexagonal unit cell, had 15 % lower compression strength and 20 % lower energy absorption. Analytical models based on honeycomb geometry and PLA material properties were used to predict how the structures would deform. Finite element analysis (FEA) was also conducted to study the deformation under dynamic loading, with Lattice 5 proving to be the most efficient design. The diagonal struts in Lattice 5 helped to redistribute the load more evenly, reducing stress concentrations and allowing for a more gradual deformation. The FEA results matched the experimental data closely, confirming the accuracy of the predictions. These findings offer useful insights for improving lattice structures for applications that require high performance in terms of both structural strength and energy absorption.</div></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"20 ","pages":"Article 100322"},"PeriodicalIF":3.2,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144685761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0