Article
Engineering, Multidisciplinary
Aisha Abelen, Martin Kroon
Summary: This paper investigates the mechanical response of semi-crystalline polymers during cyclic loading through both modeling and experimental testing. The Eulerian model used is independent of measures of total deformation and plastic/inelastic deformations, and can account for strain-rate dependence, work hardening, and damage. The model is validated by uniaxial tension tests on high-density polyethylene (HDPE) and implemented as a UMAT in Abaqus for simulating 3D geometries without any convergence issues.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2023)
Article
Mechanics
Martin Kroon, M. B. Rubin
Summary: A constitutive model for isotropic, semi-crystalline polymers, independent of measures of total deformation and plastic/inelastic deformations, is proposed. The model is capable of accounting for strain-rate dependence, work hardening, stress relaxation, volumetric inelastic deformations, and damage. The model was successfully applied to polyoxymethylene (POM) uniaxial tension tests and implemented in a 3D geometry simulation using Abaqus.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Lucie Spannraft, Paul Steinmann, Julia Mergheim
Summary: This article proposes a generalized mechanical interface model for nonlinear kinematics. The interface's response allows for jump in deformations, cohesive failure, and interfacial (in)elasticity. An anisotropic cohesive law is formulated to induce additional shear-like stresses within the interface. Damage variables are used to couple cohesive and membrane degradations, considering the interaction between different deformation modes. The model is thermodynamically consistent and fulfills the balance equations and material frame indifference. Numerical examples demonstrate the influence of damage coupling on the mechanical response of adhesive layers.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Mechanics
Dragan Kovacevic, Bharath K. Sundararajan, Frans P. van der Meer
Summary: In this paper, a finite deformation micromechanical framework is developed for modeling rate-dependent failure in unidirectional composites under off-axis loading. The model takes into account microcrack initiation based on local stress and deformation state, as well as the inclusion of geometric nonlinearity and viscoplasticity. The change in microstructure orientation during loading is found to have an important implication on the material strength.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Mechanics
Pericles R. P. Carvalho, Humberto B. Coda, Rodolfo A. K. Sanches
Summary: We propose a phenomenological viscoelastic-viscoplastic model for simulating the large strain constitutive response of polymeric materials. The model is developed in a thermodynamic framework, with elastic, viscous and plastic deformation components being multiplicatively decomposed. The viscoplastic part of the model includes Perzyna-like model and takes into account the rate-dependency of plastic stiffness. The model is implemented in a large-deformation finite element framework and calibrated and validated using monotonic, creep, and relaxation experimental results.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Engineering, Multidisciplinary
Albert Puigferrat, Miguel Maso, Ignasi De-Pouplana, Guillermo Casas, Eugenio Onate
Summary: A numerical method combining Lagrangian and Eulerian approaches is proposed to solve advective-diffusive-absorptive problems, showing effectiveness through validation with various test cases.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Engineering, Geological
Ding-Bao Song, Zhen-Yu Yin, Peng-Lin Li, Jian-Hua Yin
Summary: Spatial variability of engineering properties is common in soil layers due to natural characteristic heterogeneity. However, few studies have considered the changes in soil properties during consolidation and large strains in long-term analysis of soft soils. A 1-D consolidation model, called EVPC, fully coupled with elastic viscoplastic constitutive model, incorporates the idea of 'equivalent time' to account for large strain, soil self-weight, compressibility, permeability, and creep. The model's effectiveness and accuracy are verified through comparison with finite element simulations and oedometer tests, and it is further applied to estimate the settlement and excess pore pressure distribution of a clay layer from a field test.
Article
Computer Science, Interdisciplinary Applications
Penglin Li, Jian-Hua Yin, Zhen-Yu Yin, Zejian Chen
Summary: This paper develops a one-dimensional finite strain consolidation model to consider the creep characteristics of soft clay during the self-weight consolidation process. The model considers Darcian and non-Darcian flow, nonlinear compressibility and permeability of soft clays with varying water content. The simulation results of three case studies show that the model can capture the self-weight consolidation process well with more realistic consideration of the creep feature of clays compared to previous models.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Multidisciplinary
Fangping Qin, Fucong Lu, Kaijuan Chen, Yuhang Hou, Chuanbiao Zhang, Long Huang
Summary: This paper presents a micromechanical model based on the finite element method for analyzing the ratchetting deformation of short glass fiber-reinforced polymer composites. By constructing a damage-coupled nonlinear viscoelastic-viscoplastic cyclic constitutive model and conducting experimental validation, the model was incorporated into a finite element model. The effects of fiber content and cyclic peak stress on the ratchetting of SFRPCs were studied, and the impact of fiber length and stiffness on the ratchetting deformation of SFRPCs was discussed using the developed micro-FEM model.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Polymer Science
Tobias Daniel Horn, Dario Heidrich, Hans Wulf, Michael Gehde, Joern Ihlemann
Summary: A multiscale simulation method is proposed for determining mechanical properties of semi-crystalline polymers, involving nanoscale modeling of crystallization, finite element simulation of mechanical behavior, and microscale prediction of macroscopic component behavior. The method allows for understanding the relationship between mechanical properties and degree of crystallization across different scales.
Review
Polymer Science
Dries Vaes, Peter Van Puyvelde
Summary: This review focuses on the processing characteristics and factors affecting semi-crystalline polymers in Fused Filament Fabrication (FFF), highlighting the impact of processing conditions, feedstock modifications, and microstructure on mechanical performance and part quality. Specific phenomena during the printing process are discussed, along with a critical outlook on future research challenges when using semi-crystalline polymers as FFF feedstock.
PROGRESS IN POLYMER SCIENCE
(2021)
Article
Instruments & Instrumentation
Yifu Huang, Wentao Tang, Zekun Deng, Wenhong Ruan
Summary: This work introduces a novel strategy of reversible microcrystalline-spherulite morphology transition based on photo-triggered immiscible phase aggregation in semi-crystalline block polymer. By adjusting the end-to-end distance of polymer chains, high-entropy or low-entropy states can be generated to influence chain nucleation and control crystallization morphologies, while also simultaneously tuning mechanical and electrical properties. Promising potential applications for optical patterning, memory materials, and solid-state electrochemistry can be expected.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Yejin Kim, Hyungju Ahn, Dahyeon Yoo, Mingi Sung, Hyeonjin Yoo, Sohee Park, Junghoon Lee, Byoung Hoon Lee
Summary: A highly stretchable polymer semiconductor with improved thin film crystallinity and stretchability through thermal annealing has been reported. The annealed polymer thin films at temperatures higher than their crystallization temperatures exhibit significantly enhanced stretchability (>200%) and hole mobility (>=0.2 cm(2) V-1 s(-1)). The thermal-assisted structural phase transition, allowing the formation of edge-on crystallites and reinforcing interchain noncovalent interactions, contributes to the simultaneous enhancement of crystallinity and stretchability.
Article
Thermodynamics
Elisa Davoli, Martin Kruzik, Paolo Piovano, Ulisse Stefanelli
Summary: Starting from a three-dimensional setting, a limit model of a thin magnetoelastic film is derived using Gamma-convergence techniques. The model incorporates both Lagrangian and Eulerian terms, as magnetization vectors are defined on the elastically deformed configuration. Qualifying admissible three-dimensional deformations of planar domains in terms of injectivity and a careful treatment of the Maxwell system in the deformed film are necessary.
CONTINUUM MECHANICS AND THERMODYNAMICS
(2021)
Article
Engineering, Mechanical
Xizhe Zhang, Shuze Zhu
Summary: This study investigates the molecular simulation of semi-crystalline cellulose nanofibrils and finds that by tuning the semi-crystalline topologies, both the strength and toughness of the nanofibrils can be simultaneously increased. This research provides simple topology engineering strategies for designing ultra-strong and ultra-tough nanofibril and network structures, which can be extended to other material systems, enabling the design of strong and tough advanced polymeric materials.
EXTREME MECHANICS LETTERS
(2023)
Article
Mechanics
D. Morin, G. Haugou, B. Bennani, F. Lauro
ENGINEERING FRACTURE MECHANICS
(2010)
Article
Engineering, Mechanical
F. Lauro, B. Bennani, D. Morin, A. F. Epee
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2010)
Article
Engineering, Mechanical
D. Morin, B. Bourel, B. Bennani, F. Lauro, D. Lesueur
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2013)
Article
Mechanics
A. F. Epee, F. Lauro, B. Bennani, B. Bourel
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2011)
Article
Mechanics
D. Notta-Cuvier, F. Lauro, B. Bennani, R. Balieu
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2013)
Article
Engineering, Chemical
D. Morin, G. Haugou, B. Bennani, F. Lauro
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2011)
Article
Materials Science, Multidisciplinary
D. Notta-Cuvier, F. Lauro, B. Bennani, R. Balieu
MECHANICS OF MATERIALS
(2014)
Article
Materials Science, Characterization & Testing
D. Notta-Cuvier, B. Langrand, E. Markiewicz, F. Lauro, G. Portemont
Article
Engineering, Mechanical
AK Pickett, T Pyttel, F Payen, F Lauro, N Petrinic, H Werner, J Christlein
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2004)
Article
Engineering, Industrial
P Croix, F Lauro, J Oudin, J Christlein
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2003)
Article
Engineering, Manufacturing
B. Zouari, F. Lauro, B. Bennani, E. Markiewicz, D. Even, D. Cornette
INTERNATIONAL JOURNAL OF CRASHWORTHINESS
(2006)
Article
Engineering, Manufacturing
P Croix, F Lauro, B Bennani
INTERNATIONAL JOURNAL OF CRASHWORTHINESS
(2004)