Article
Mechanics
Jiani Teng, Qiliang Lin, Liangliang Zhang, Gang Lei, Gan Song, Yang Gao
Summary: This paper studies the thermoelastic-plastic behavior of functionally graded materials (FGMs) by considering the pairwise particle interaction based on the micromechanics. The graded microstructures of FGMs are represented using a representative volume element (RVE), and the von-Mises yield function is extended to solve FGMs problems. The overall effective thermoelastic-plastic behavior of FGMs can be numerically obtained by employing the backward Euler's method.
Article
Materials Science, Characterization & Testing
Viacheslav Balobanov, Tuukka Verho, Vuokko Heino, Helena Ronkainen, Jani Pelto
Summary: The scratch resistance of polymers is crucial for many applications, but the theoretical understanding is incomplete. Numerical modeling is a potentially useful means towards a clearer picture of the scratching process.
Article
Materials Science, Multidisciplinary
Aazim Shafi Lone, G. A. Harmain, Azher Jameel
Summary: This study investigates the frictional contact behavior in engineering materials with different types of discontinuities using the extended finite element method. The method accurately models contact interfaces, avoiding the issues of meshing and remeshing. The technique employs the level set method to identify the contact interface and uses the Heaviside jump function to develop local enrichment. Non-penetration conditions and contact constraints are imposed using a penalty-based approach.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Dimitra Kourtidou, Konstantinos Tsongas, Maria-Eirini Grigora, Dimitrios Tzetzis, Dimitrios N. Bikiaris, Konstantinos Chrissafis
Summary: This study synthesized SCB-PE nanocomposites using graphene nanoplatelets as a reinforcing filler and found that the ball-milling process had an impact on the crystallinity and mechanical properties of the nanocomposites. With an increasing filler content, the tensile properties of the ball-milled samples were significantly enhanced and exhibited superior fracture behavior.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Qingqing Wang, Ravi M. Shankar, Zhanqiang Liu
Summary: The interconnection between texture variation and the activations of slip systems in machining of Ti-6AL-4V was explored using orientation imaging microscopy (OIM) and visco-plastic self-consistent (VPSC) framework. It was found that the combination of prismatic, basal, pyramidal, and 2nd order pyramidal slip systems induces the generation of C shear texture, with the activation of the 2nd order slip system playing a significant role. This finding is crucial for controlling texture variation in the deformation of Ti-6AL-4V.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Mechanical
Aizhong Wu, Lin Weng, Dingyu Hu, Aihua Liao
Summary: In this study, a micromechanical model is proposed to investigate the shear fracture and wear behavior of metallic materials with random inclusions. It is demonstrated that subsurface micro-cracks, especially those near inclusions, play a major role in adhesive wear, and the model shows promise for predicting adhesive wear.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Mechanical
B. Hari Babu, P. Srinivasa Rao, M. Gnaneswara Reddy, S. V. K. Varma
Summary: The present investigation numerically examines the impacts of Cattaneo-Christov double diffusions, variable properties, and activation energy on Eyring-Powell non-Newtonian liquid over a non-linear stretching surface. The study also considers the influence of applied magnetic field and velocity slip condition. The results provide insights into the flow field, temperature and species distribution, as well as the impact of various flow variables. The findings are important for the maintenance of advanced nuclear reactor systems.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Materials Science, Composites
Yufeng Liu, Longbiao Li, Zhongwei Zhang, Yalei Wang
Summary: This study fabricated 3D needle-punched C/SiC composite using chemical vapor deposition and reactive infiltration method. By conducting cyclic loading/unloading tensile tests at different peak stresses, a micromechanical hysteresis constitutive relationship considering damage mechanisms of matrix cracking, interface debonding and slip, and fiber's fracture and pullout was developed. The research predicted the hysteresis loops of different types of composites and established the relationship between hysteresis behavior and microstructure damage evolution, finding that the hysteresis loops of composites depend on fiber preform and interface properties.
COMPOSITE INTERFACES
(2022)
Article
Engineering, Multidisciplinary
Yuxi Xie, Shaofan Li
Summary: In this study, a temperature-dependent higher-order Cauchy-Born rule was developed for multiscale crystal defect dynamics, specifically applied to body-centered cubic single crystal tantalum. The finite temperature atomistic-informed crystal plasticity finite element method successfully captured the temperature-dependent dislocation substructure and anisotropic crystal plasticity of tantalum single crystals. This work also highlighted the effects of strain gradients, non-Schmid effects, and size effects in BCC crystals, as well as the ability to simulate cross-slip and dislocation cell structure at different temperatures.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2021)
