9 results on '"Wenxuan Xia"'
Search Results
2. 3-Dimensional Bond-Based Peridynamic Representative Volume Element Homogenization
- Author
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Wenxuan Xia, Selda Oterkus, and Erkan Oterkus
- Subjects
Materials science ,Peridynamics ,Surfaces and Interfaces ,Mechanics ,Condensed Matter Physics ,Homogenization (chemistry) ,Mechanics of Materials ,Representative elementary volume ,Periodic boundary conditions ,General Materials Science ,Point (geometry) ,Tensor ,Boundary value problem ,Material properties - Abstract
In this study, a 3-dimensional (3D) implementation of representative volume element homogenization using bond-based peridynamic formulation is presented. Periodic boundary condition is established by coupling the displacements of periodic point pairs. Homogenized (effective) material properties are obtained based on peridynamic displacement gradient tensor. The current approach is validated by considering a composite material without defects and comparing homogenized properties with results obtained from another homogenization approach. Next, the capability of the current approach is demonstrated by considering randomly generated cracks with arbitrary orientation and location. It can be concluded that the current approach can be an alternative approach to obtain 3-dimensional homogenized material properties for heterogeneous materials with defects.
- Published
- 2021
- Full Text
- View/download PDF
3. Peridynamic computational homogenization theory for materials with evolving microstructure and damage
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Yakubu Kasimu Galadima, Wenxuan Xia, Erkan Oterkus, and Selda Oterkus
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Modeling and Simulation ,General Engineering ,TC ,Software ,Computer Science Applications - Abstract
This study aims to establish a framework for multiscale assessment of damage for materials with evolving microstructure based on a recently proposed peridynamic computational homogenization theory. The framework starts with replacing a material with complex microstructure with a constitutively equivalent material that is microstructurally homogenous. Constitutive equivalence between the original and the substitute materials is achieved through enforcing strain energy equivalence via the so-called nonlocal Hill’s lemma. The damage law is obtained by numerically solving boundary volume constraint problem of an RVE. The result from the analysis of the RVE problem was compared with the previously published result to establish the validity of the proposed framework. The comparison shows good agreement between result obtained using the proposed framework and those reported in the literature.
- Published
- 2022
- Full Text
- View/download PDF
4. Effect of Eurotium cristatum fermentation on the α-glucosidase inhibitory activity of mulberry leaves flavonoid extract
- Author
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Fangyu Qu, Zi Wang, Yue Deng, Yuchen Xing, and Wenxuan Xia
- Subjects
chemistry.chemical_classification ,Chronic disease ,chemistry ,Flavonoid ,Ic50 values ,Fermentation ,Food science ,α glucosidase inhibitory ,Mulberry leaf - Abstract
Diabetes has become a global chronic disease and alpha-glucosidase inhibitors is an effective ways of treating it. Flavonoids are a group of substances in mulberry leaves that have α-glucosidase inhibitory properties and can reduce blood glucose concentrations effectively. In this paper, flavonoids from mulberry leaves fermented by Eurotium cristatum CY-1 will be used to investigate their inhibitory properties on α-glucosidase. The results indicated that the fermentation would increase the total flavonoid content of mulberry leaves by 196.7%. Meanwhile, the α-glucosidase inhibition efficiency of flavonoids extracted from the fermented mulberry leaves was also enhanced under the same concentration. The IC50 values of the flavonoids extracted from 8 d fermented mulberry leaves and the unfermented mulberry leaf was 4.14 μg/mL and 10.26 μg/mL, respectively. This article will provide a reference for using microbial fermentation to enrich active ingredients of functional Chinese medicine herbs.
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- 2021
- Full Text
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5. Contributors
- Author
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Sundaram Vinod K. Anicode, Atila Barut, Tinh Quoc Bui, Cagan Diyaroglu, Mehmet Dorduncu, Yakubu Kasimu Galadima, Ugo Galvanetto, Xiaoqiao He, Masaki Hojo, Michiya Imachi, Ali Javili, Lei Ju, Emma Lejeune, Christian Linder, Xuefeng Liu, Chun Lu, Erdogan Madenci, Naoki Matsuda, Andrew McBride, Cody Mitts, Cong Tien Nguyen, Masaaki Nishikawa, Erkan Oterkus, Selda Oterkus, Murat Ozdemir, Anil Pathrikar, Timon Rabczuk, Debasish Roy, Pranesh Roy, Arman Shojaei, Stewart A. Silling, Paul Steinmann, Satoyuki Tanaka, Bozo Vazic, Qing Wang, Wenxuan Xia, Yanzhuo Xue, Zhenghao Yang, Mirco Zaccariotto, and Xiaoying Zhuang
- Published
- 2021
- Full Text
- View/download PDF
6. Multiscale modeling with peridynamics
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Erkan Oterkus, Selda Oterkus, Wenxuan Xia, and Yakubu Kasimu Galadima
- Subjects
Model order reduction ,Peridynamics ,Computer science ,business.industry ,Mechanical engineering ,3D printing ,business ,Multiscale modeling ,Homogenization (chemistry) ,Microscale chemistry - Abstract
With the advancement of manufacturing technologies such as 3D printing, designing microstructured materials have become available. However, defects can still exist at the microscale in the form of microcracks and voids. With the current computational power, it is still challenging to fully model these materials at the microscale. Hence, multiscale methodologies appear to be the promising approach to model such structures. In this chapter three different multiscale methodologies used in peridynamic framework including coarsening, model order reduction using static condensation, and homogenization are covered and briefly explained. By using such strategies, significant benefits can be obtained especially in terms of computational time.
- Published
- 2021
- Full Text
- View/download PDF
7. 3-Dimensional bond-based peridynamic representative volume element homogenization
- Author
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Wenxuan Xia, Oterkus, Erkan, and Oterkus, Selda
- Subjects
bond-based ,������������ ���������������������������� ,�������������������� ,������������������������ ,homogenization ,�������������������������� ������������������ �������������� ,peridynamics ,periodic boundary condition ,3D - Abstract
In this study, a 3-dimensional (3D) implementation of representative volume element homogenization using bond-based peridynamic formulation is presented. Periodic boundary condition is established by coupling the displacements of periodic point pairs. Homogenized (effective) material properties are obtained based on peridynamic displacement gradient tensor. The current approach is validated by considering a composite material without defects and comparing homogenized properties with results obtained from another homogenization approach. Next, the capability of the current approach is demonstrated by considering randomly generated cracks with arbitrary orientation and location. It can be concluded that the current approach can be an alternative approach to obtain 3-dimensional homogenized material properties for heterogeneous materials with defects., �� ������������ ������������������������ �������������������� �������������������� �������������������� �������������� ���������������� ���������������������������������� ������������ �� ���������������������������� �������������������������������� ������������������������ ���� ������������ ������������ ����������������������������. �������������������������� ������������������ �������������� ������������ ���������� �������������������� ���������������������� ������ �������������������������� ����������. ���������������������� (����������������������) ���������������� ������������������ ���������������� ���� ������������ ���������������������������������� �������������� ������������������ ����������������. ���������������������� �������������� �������������� ������������������ ���� �������������� �������������������������� ������������������������������ ������������������ ���������� ������������������ ������ ���������������������� �������������� �� ������������������������, ���������������������� �� �������������� �������������� ������������ ��������������������. ���������������������� ���������������������� �������������������� ������������������������ ���������������� ������ ������������������������ �������������������� ������������������������ ������������ ������������������ ��������������������. ������������������ ������������ ���������� �������������� �������������������������� ������������ �������������� ������ ���������������������� �������������������� ���������������������� �������������� ��������������������-������������������������ �������������������� �� ������������������.
- Published
- 2021
- Full Text
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8. Ordinary state-based peridynamic homogenization of periodic micro-structured materials
- Author
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Wenxuan Xia, Erkan Oterkus, and Selda Oterkus
- Subjects
Work (thermodynamics) ,Materials science ,Peridynamics ,VM ,Applied Mathematics ,Mechanical Engineering ,0211 other engineering and technologies ,Periodic point ,02 engineering and technology ,Mechanics ,Condensed Matter Physics ,Homogenization (chemistry) ,Displacement (vector) ,020303 mechanical engineering & transports ,0203 mechanical engineering ,Periodic boundary conditions ,General Materials Science ,TJ ,Tensor ,Material properties ,021101 geological & geomatics engineering - Abstract
In this work, an ordinary state-based peridynamic homogenization method is presented, in which periodic boundary condition is enforced by coupling the displacement of periodic point pairs. Effective material properties are obtained from the peridynamic displacement gradient tensor. The governing equation of peridynamics is in integro-differential form instead of more common spatial differential form, which grants it unique advantage in performing homogenization analysis involving defects. Recently, with the rapid advancement in additive manufacturing technology, micro-structured materials have attracted significant attention. Microscopic defects occurring during manufacturing process can have a noticeable impact on the overall material behavior especially on the fracture strength of the material. The current study provides a new approach to obtain the effective properties of periodic micro-structured materials with defects.
- Published
- 2021
- Full Text
- View/download PDF
9. Buckling analysis of cracked plates using peridynamics
- Author
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Wenxuan Xia, Jeeyeon Heo, Erkan Oterkus, Zhenghao Yang, and Selda Oterkus
- Subjects
Environmental Engineering ,Materials science ,Peridynamics ,Finite element software ,business.industry ,Variable thickness ,020101 civil engineering ,Ocean Engineering ,02 engineering and technology ,Structural engineering ,01 natural sciences ,010305 fluids & plasmas ,0201 civil engineering ,Buckling ,0103 physical sciences ,Boundary value problem ,business ,TC ,Eigenvalues and eigenvectors - Abstract
In this study, buckling analysis of cracked plates is performed by using peridynamics. A peridynamic Mindlin plate formulation is used and the numerical implementation is done using commercial finite element software, ANSYS. Critical buckling load is obtained by utilizing ANSYS Eigenvalue Buckling Analysis feature. Peridynamic results are compared against numerical and experimental results and a good agreement is obtained between different approaches. After verifying the formulation, it is utilised to investigate the effect of crack length, crack orientation and plate thickness on the critical buckling load values for a centrally and side-edge cracked plates subjected to clamped-free-clamped-free (CFCF) boundary conditions. Moreover, the effect of variable thickness on the critical buckling load is also examined.
- Published
- 2020
- Full Text
- View/download PDF
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