International Journal of Solids and Structures最新文献

Stability discussion and application study of pseudo-corner models 伪角模型的稳定性讨论和应用研究

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2024-11-13 DOI: 10.1016/j.ijsolstr.2024.113136

Tianyin Zhang , Xianhong Han

{"title":"Stability discussion and application study of pseudo-corner models","authors":"Tianyin Zhang , Xianhong Han","doi":"10.1016/j.ijsolstr.2024.113136","DOIUrl":"10.1016/j.ijsolstr.2024.113136","url":null,"abstract":"<div><div>Accurate plastic flow modelling under complex working conditions is crucial for metal deformation simulations. Recently, some advanced pseudo-corner models have been developed to describe corner effects and analyze strain localization problems. The present work consists of three parts. The first part discusses the intrinsic stability of the pseudo-corner model class, which forms the premise of application analysis. The second part applies the pseudo-corner models and the associated flow rule (AFR) to buckling onset estimation, plastic post-buckling analysis and shear band analysis. The experimental conditions are strictly reproduced and the optimal model parameters are determined. The results reveal that the pseudo-corner models and AFR are indistinguishable in the buckling onset estimation. AFR overestimates the post-buckling strength of circular tubes under axial compression, and cannot reproduce the shear band development during sheet bending; while the pseudo-corner models have better prediction performance in both scenarios. The results also suggest that the parameter values of pseudo-corner models are apparently inconsistent in the above two types of problems. Then in the third part, two representative influencing factors including strain gradient plasticity and initial imperfections are discussed, and this inconsistency is finally attributed to the shortwave surface defect which however is usually neglected by previous studies.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"308 ","pages":"Article 113136"},"PeriodicalIF":3.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654297","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

A new porous constitutive model for additively manufactured PLA 聚乳酸添加剂制造的新型多孔结构模型

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2024-11-12 DOI: 10.1016/j.ijsolstr.2024.113131

P. Areias, N. Silvestre, M.F. Vaz, M. Leite

{"title":"A new porous constitutive model for additively manufactured PLA","authors":"P. Areias, N. Silvestre, M.F. Vaz, M. Leite","doi":"10.1016/j.ijsolstr.2024.113131","DOIUrl":"10.1016/j.ijsolstr.2024.113131","url":null,"abstract":"<div><div>We introduce a new specific hyperelastic/plastic model and porosity evolution law able to capture the deformation and damage of additively manufactured PLA-N polymers (Fused Filament Fabrication — FFF). Porosity growth is driven by projecting the right Cauchy–Green tensor in the normal to the deposition direction and by solving a local maximization problem. Fracture energy is introduced directly in the resulting law by means of a length scale. A full finite-strain plasticity model is adopted, based on the Hosford yield criterion. Strain softening is regularized with a gradient-enhanced technique, which is solved in tandem with the equilibrium equations. A comprehensive analysis of the hyperelastic transversely isotropic/porous constitutive law is performed, with physical insight on the directional strain softening behavior. A normalized CT test specimen is used to qualitatively assess the effect of deposition direction on the crack path and to investigate the effect of mesh density in the load/displacement curves. We then present a comparison with our experimental results for a cellular PLA-N beam composed of 3 × 13 cells, in terms of crack behavior and load/displacement results. Sequential collapse of the cells and strain localization match the experimental observations.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"307 ","pages":"Article 113131"},"PeriodicalIF":3.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Defect dynamics modeling of mesoscale plasticity 中尺度塑性缺陷动力学建模

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2024-11-07 DOI: 10.1016/j.ijsolstr.2024.113132

Phu Cuong Nguyen , Nicole Aragon , Ill Ryu

{"title":"Defect dynamics modeling of mesoscale plasticity","authors":"Phu Cuong Nguyen , Nicole Aragon , Ill Ryu","doi":"10.1016/j.ijsolstr.2024.113132","DOIUrl":"10.1016/j.ijsolstr.2024.113132","url":null,"abstract":"<div><div>The collective motion of defects and their interaction are the basic building blocks for plastic deformation and corresponding mechanical behaviors of crystalline metals. Especially, dislocations among various defects are the “carrier” of plastic deformation in many crystalline materials, particularly ductile materials. To get a fundamental understanding of plastic deformation mechanisms, it calls for an integrated computational platform to simultaneously capture detailed defects characteristics across several length scales together with corresponding macroscopic mechanical response. In this paper, we present a three-dimensional mesoscale defect dynamics model to directly couple the three dimensional discrete dislocation dynamics model with continuum finite element method, aiming at capturing both size dependent plasticity at micron-, and submicron scale and constitutive behaviors at larger scales where such size-dependence disappear. Using non-singular dislocation theories, our model could accurately consider both short- and long-range elastic interactions between multiple dislocation segments with even higher computational efficiency than traditional dislocation dynamics simulations, together with the careful consideration of crystal/material rotation in the coupled framework. In addition, our model could directly model dislocation nucleation from stress concentrators such as a void, crack and indentor tip, which could allow us to investigate various defects’ motion and their mutual interactions, predicting macroscopic mechanical response of complex structures. The developed concurrently coupled model could also consider multiphysical phenomena by solving coupled governing equations in finite element framework, which could shed light on complex defect behaviors under various physical environments.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"307 ","pages":"Article 113132"},"PeriodicalIF":3.4,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658693","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

Investigation of dynamic impact behavior of bighorn sheep horn 大角羊角动态冲击行为调查

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2024-11-06 DOI: 10.1016/j.ijsolstr.2024.113133

Emre Palta , Howie Fang , Qian Wang , Zheng Li

{"title":"Investigation of dynamic impact behavior of bighorn sheep horn","authors":"Emre Palta , Howie Fang , Qian Wang , Zheng Li","doi":"10.1016/j.ijsolstr.2024.113133","DOIUrl":"10.1016/j.ijsolstr.2024.113133","url":null,"abstract":"<div><div>The horn of the bighorn sheep is composed of keratin-based biological material that has a tubule-lamella structure, which gives it anisotropic hardening properties under impact loading. This paper aims to investigate the energy dissipation mechanisms inherent in bighorn sheep horns by developing a numerical material model that accounts for the horn’s anisotropic features and strain-rate effects. To this end, a transversely isotropic constitutive model, which includes both anisotropic hardening and strain-rate effects, was formulated to accurately predict the mechanical behavior of bighorn sheep horns. Material characterization was conducted through uniaxial compression tests that were conducted under quasi-static and dynamic conditions. The developed constitutive model was implemented into LS-Dyna via a user-defined material subroutine and was validated against empirical data. The validated numerical model was used to investigate the horn’s mechanical responses under dynamic loading conditions. The paper focused on impact energy dissipation mechanisms, including energy absorption and transition, stress distribution, and displacement wave propagation. The insights gained from this paper are expected to significantly contribute to the development of novel artificial materials with enhanced energy absorption and impact mitigation properties.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"307 ","pages":"Article 113133"},"PeriodicalIF":3.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658695","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

Influence of agglomeration and waviness phenomena on torsional oscillation of MWCNTs-reinforced composite rods 团聚和波状现象对 MWCNT 增强复合材料棒扭转振荡的影响

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2024-11-02 DOI: 10.1016/j.ijsolstr.2024.113127

Wenyuan Zhou , Yong Huang , Zhixin Wu , Mostafa Habibi , Mohamad Habibi , Riadh Marzouki

{"title":"Influence of agglomeration and waviness phenomena on torsional oscillation of MWCNTs-reinforced composite rods","authors":"Wenyuan Zhou , Yong Huang , Zhixin Wu , Mostafa Habibi , Mohamad Habibi , Riadh Marzouki","doi":"10.1016/j.ijsolstr.2024.113127","DOIUrl":"10.1016/j.ijsolstr.2024.113127","url":null,"abstract":"<div><div>There are some inevitable challenges during the manufacturing of reinforced composite structures. Agglomeration of reinforcement and wavy reinforcement are in this category. These phenomena possess remarkable effects on the mechanical behavior of reinforced composite structures. In the current research, the effect of agglomeration and waviness of reinforcements on torsional dynamic characteristics of multi-walled carbon nanotubes (MWCNTs) reinforced composite rods subjected to two various boundary conditions have been evaluated. Three dissimilar cross-section shapes have been considered to understand the effect of cross-section shapes on torsional behavior of MWCNTs-reinforced composite rods. A new form of Halpin-Tsai homogenization model has been exerted to estimate the material properties of composite structures. Additionally, Timoshenko-Gere theory in conjunction with the Hamilton’s principle has been employed to derive the partial differential governing equation of MWCNTs-reinforced composite rods. Afterward, the obtained equation was solved using an analytical approach. The precision of the methodology utilized has been evaluated against the results of previous studies documented in the literature. Ultimately, the effects of various significant parameters on the changes in natural torsional frequency have been analyzed and presented in a series of tables and figures. Based on the obtained results, the rectangular rod has the highest torsional frequency and also the effect of MWCNTs’ volume fraction depends on the consideration of waviness and agglomeration factors. At a greater volume fraction of MWCNTs, the agglomeration factor is more effective than the waviness factor and vice versa.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"306 ","pages":"Article 113127"},"PeriodicalIF":3.4,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654136","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

OXFORD-UMAT: An efficient and versatile crystal plasticity framework OXFORD-UMAT：高效多用途晶体塑性框架

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2024-11-01 DOI: 10.1016/j.ijsolstr.2024.113110

Eralp Demir , Alvaro Martinez-Pechero , Chris Hardie , Edmund Tarleton

{"title":"OXFORD-UMAT: An efficient and versatile crystal plasticity framework","authors":"Eralp Demir , Alvaro Martinez-Pechero , Chris Hardie , Edmund Tarleton","doi":"10.1016/j.ijsolstr.2024.113110","DOIUrl":"10.1016/j.ijsolstr.2024.113110","url":null,"abstract":"<div><div>The crystal plasticity-based finite element method is widely used, as it allows complex microstructures to be simulated and allows direct comparison with experiments. This paper presents the OXFORD-UMAT for Abaqus®, a novel crystal plasticity code that is publicly available online for researchers interested in using crystal plasticity. The model is able to simulate a wide range of materials and incorporates two different solvers based on the solution of slip increments and Cauchy stress, with variants of state update procedures including explicit, semi-implicit, and fully-implicit for computational efficiency that can be set by the user. Constitutive laws are available for a range of materials with single or multiple phases for slip, creep, strain hardening, and back stress. The model includes geometrically necessary dislocations that can be computed using finite element interpolation functions by four alternative methods, including the total form with and without a correction for the dislocation flux, a widely used rate form, and a slip-gradient formulation. In addition, the initial strengthening and subsequent softening seen in irradiated materials can also be simulated with the model. The analysis is available in 2D (plane stress and plane strain) and 3D, including linear and quadratic elements. Here we include full derivations of the key equations used in the code and then demonstrate the capability of the code by modeling single-crystal and large-scale polycrystal cases. Comparison of OXFORD-UMAT with other available crystal plasticity codes for Abaqus® reveals the efficiency of the proposed approach, with the backup solver offering greater versatility for handling convergence issues commonly found in practical applications.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"307 ","pages":"Article 113110"},"PeriodicalIF":3.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microvoiding and constitutive damage modeling with artificial neural networks 利用人工神经网络建立微空洞和构成性损伤模型

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2024-10-30 DOI: 10.1016/j.ijsolstr.2024.113125

Ning Li, Huck Beng Chew

{"title":"Microvoiding and constitutive damage modeling with artificial neural networks","authors":"Ning Li, Huck Beng Chew","doi":"10.1016/j.ijsolstr.2024.113125","DOIUrl":"10.1016/j.ijsolstr.2024.113125","url":null,"abstract":"<div><div>Continuum models of porous media have revolutionized computational fracture mechanics for traditional ductile materials, but the inherent assumptions have limited generalizability to other target materials or loading conditions. Here, we adopt a series of artificial neural networks (ANNs) to predict both the microscopic voiding characteristics (void shape, porosity) and macroscopic stress–strain constitutive response of porous elasto-plastic materials under various deformation states. We train the ANNs on a dataset generated from finite element models of 3D representative volume elements (RVEs), each containing a discrete spherical void, subjected to combinations of loading states. Results show that the data-driven model is capable of interpolative predictions as well as some levels of extrapolative predictions across a wide range of initial porosities (0–20%) and loading states outside of the training dataset, even at high deformation strains which induce extensive material softening and void growth. Through transfer learning, we further demonstrate that the ANNs, originally trained on a specific porous material dataset, can be readily adapted to other porous materials with substantially different properties through a significantly reduced training dataset. We discuss the implications of this machine learning approach vis-à-vis the extensively-developed Gurson model for porous material damage and failure predictions.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"306 ","pages":"Article 113125"},"PeriodicalIF":3.4,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analyzing creep-recovery behavior of tropical Entandrophragma cylindricum wood: Traditional and fractional modeling methods 分析热带 Entandrophragma cylindricum 木材的蠕变恢复行为：传统和分数建模方法

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2024-10-30 DOI: 10.1016/j.ijsolstr.2024.113122

L.C. Nguedjio , J.S. Mabekou Takam , R. Moutou Pitti , B. Blaysat , N. Sauvat , J. Gril , F. Zemtchou , P.K. Talla

{"title":"Analyzing creep-recovery behavior of tropical Entandrophragma cylindricum wood: Traditional and fractional modeling methods","authors":"L.C. Nguedjio , J.S. Mabekou Takam , R. Moutou Pitti , B. Blaysat , N. Sauvat , J. Gril , F. Zemtchou , P.K. Talla","doi":"10.1016/j.ijsolstr.2024.113122","DOIUrl":"10.1016/j.ijsolstr.2024.113122","url":null,"abstract":"<div><div>Nowadays, wood stands as one of the foremost used construction materials, owing largely to its exceptional physical and mechanical properties. Ensuring the safety of timber structures necessitates thorough investigations into the influential phenomena that significantly affect their strength and longevity. The aim of this paper is to study the coupled creep-recovery behavior of tropical wood from the <em>Entandrophragma cylindricum</em> species by evaluating the influence of stress levels on the performance of rheological models. Hence, the Burger and Weibull classic models were introduced to elucidate these phenomena. These models have been compared with the fractional Maxwell and Zener models. Following the simulations, the Burger classic model effectively characterized creep and recovery, comprising elastic, viscoelastic, and viscous elements arranged in series, as well as the classic Weibull model. During the recovery phase, the four-parameter Weibull model demonstrated a satisfying description, achieving 99% accuracy compared to 97% for the four-parameter Burger classic model. Three-parameter fractional Maxwell model fit all phases of the process for all deformations with an average accuracy of 98% for creep and 95% for recovery. These results provide valuable information on the material’s ability to recover from deformation and offer essential insights for materials characterization, engineering design, and quality assurance processes in materials engineering.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"306 ","pages":"Article 113122"},"PeriodicalIF":3.4,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587221","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

Advanced finite element modeling methods for tensile and bending analysis of arresting gear cables 用于拦阻索拉伸和弯曲分析的先进有限元建模方法

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2024-10-29 DOI: 10.1016/j.ijsolstr.2024.113126

Long Li , Yiming Peng , Yifeng Wang , Xiaohui Wei , Hong Nie

引用次数: 0

Free vibration of electroelastic thin-walled structures under static load 静载荷下电弹性薄壁结构的自由振动

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2024-10-29 DOI: 10.1016/j.ijsolstr.2024.113123

A.O. Kamenskikh, S.V. Lekomtsev, A.N. Senin, V.P. Matveenko

引用次数: 0