Study of wave propagation in discontinuous and heterogeneous media with the dynamic lattice method
Abstract The development of a new dynamic lattice element method (dynamicLEM) as well as its application in the simulation of the propagation of body waves in discontinuous and heterogeneous media is the focus of this research paper. The conventional static lattice models are efficient numerical met...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-04-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-10381-y |
| _version_ | 1818049546084679680 |
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| author | Amir S. Sattari Zarghaam H. Rizvi Hendrawan D. B. Aji Frank Wuttke |
| author_facet | Amir S. Sattari Zarghaam H. Rizvi Hendrawan D. B. Aji Frank Wuttke |
| author_sort | Amir S. Sattari |
| collection | DOAJ |
| description | Abstract The development of a new dynamic lattice element method (dynamicLEM) as well as its application in the simulation of the propagation of body waves in discontinuous and heterogeneous media is the focus of this research paper. The conventional static lattice models are efficient numerical methods to simulate crack initiation and propagation in cemented geomaterials. The advantages of the LEM and the developed dynamic solution, such as simulation of arbitrary crack initiation and propagation, illustration and simulation of existing inherent material heterogeneity as well as stress redistribution upon crack opening, opens a new engineering field and tool for material analysis. To realize the time dependency of the dynamic LEM, the equation of motion of forced vibration is solved while using the Newmark- $$\beta$$ β method and implementing the non-linear Newton–Raphson Jacobian method. The method validation is done according to the results of a boundary element method (BEM) in the plane P-SV-wave propagation within a plane strain domain. Further tests comparing the generated wave types, simulation and study of crack discontinuities as well as inherent heterogeneities in the geomaterials are conducted to illustrate the accurate applicability of the new dynamic lattice method. The results indicate that with increasing heterogeneity within the material, the wave field becomes significantly scattered and further analysis of wave fields according to the wavelength/heterogeneity ratio become indispensable. Therefore, in a heterogeneous medium, the application of continuum methods in relation to structural health monitoring should be precisely investigated and improved. The developed dynamic lattice element method is an ideal simulation tool to consider particle scale irregularities, crack distributions and inherent material heterogeneities and can be easily implemented in various engineering applications. |
| first_indexed | 2024-12-10T10:39:18Z |
| format | Article |
| id | doaj.art-1337bde2d93a4beb83cf4c248117d510 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-10T10:39:18Z |
| publishDate | 2022-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-1337bde2d93a4beb83cf4c248117d5102022-12-22T01:52:21ZengNature PortfolioScientific Reports2045-23222022-04-0112111610.1038/s41598-022-10381-yStudy of wave propagation in discontinuous and heterogeneous media with the dynamic lattice methodAmir S. Sattari0Zarghaam H. Rizvi1Hendrawan D. B. Aji2Frank Wuttke3Geomechanics and Geotechnics Group, University of KielGeomechanics and Geotechnics Group, University of KielGeomechanics and Geotechnics Group, University of KielGeomechanics and Geotechnics Group, University of KielAbstract The development of a new dynamic lattice element method (dynamicLEM) as well as its application in the simulation of the propagation of body waves in discontinuous and heterogeneous media is the focus of this research paper. The conventional static lattice models are efficient numerical methods to simulate crack initiation and propagation in cemented geomaterials. The advantages of the LEM and the developed dynamic solution, such as simulation of arbitrary crack initiation and propagation, illustration and simulation of existing inherent material heterogeneity as well as stress redistribution upon crack opening, opens a new engineering field and tool for material analysis. To realize the time dependency of the dynamic LEM, the equation of motion of forced vibration is solved while using the Newmark- $$\beta$$ β method and implementing the non-linear Newton–Raphson Jacobian method. The method validation is done according to the results of a boundary element method (BEM) in the plane P-SV-wave propagation within a plane strain domain. Further tests comparing the generated wave types, simulation and study of crack discontinuities as well as inherent heterogeneities in the geomaterials are conducted to illustrate the accurate applicability of the new dynamic lattice method. The results indicate that with increasing heterogeneity within the material, the wave field becomes significantly scattered and further analysis of wave fields according to the wavelength/heterogeneity ratio become indispensable. Therefore, in a heterogeneous medium, the application of continuum methods in relation to structural health monitoring should be precisely investigated and improved. The developed dynamic lattice element method is an ideal simulation tool to consider particle scale irregularities, crack distributions and inherent material heterogeneities and can be easily implemented in various engineering applications.https://doi.org/10.1038/s41598-022-10381-y |
| spellingShingle | Amir S. Sattari Zarghaam H. Rizvi Hendrawan D. B. Aji Frank Wuttke Study of wave propagation in discontinuous and heterogeneous media with the dynamic lattice method Scientific Reports |
| title | Study of wave propagation in discontinuous and heterogeneous media with the dynamic lattice method |
| title_full | Study of wave propagation in discontinuous and heterogeneous media with the dynamic lattice method |
| title_fullStr | Study of wave propagation in discontinuous and heterogeneous media with the dynamic lattice method |
| title_full_unstemmed | Study of wave propagation in discontinuous and heterogeneous media with the dynamic lattice method |
| title_short | Study of wave propagation in discontinuous and heterogeneous media with the dynamic lattice method |
| title_sort | study of wave propagation in discontinuous and heterogeneous media with the dynamic lattice method |
| url | https://doi.org/10.1038/s41598-022-10381-y |
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