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A study on influences of interfacial progressive-partial debonding on fracture toughness enhancement of polymer nanocomposites: multiscale finite element analysis : 계면 진전 부분 분리에 따른 폴리머 나노복합재의 인성 향상에 대한 멀티스케일 유한 요소 해석
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 조맹효 | - |
| dc.contributor.author | 한진규 | - |
| dc.date.accessioned | 2018-05-29T03:13:38Z | - |
| dc.date.available | 2018-05-29T03:13:38Z | - |
| dc.date.issued | 2018-02 | - |
| dc.identifier.other | 000000150347 | - |
| dc.identifier.uri | https://hdl.handle.net/10371/141372 | - |
| dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 공과대학 기계항공공학부, 2018. 2. 조맹효. | - |
| dc.description.abstract | A multiscale analysis is performed to observe fracture toughness enhancement of the epoxy-silica nanocomposites when interfacial progressive-partial debonding of nanoparticles occurs. Allegedly, interfacial debonding-induced nanovoid growth is one of the main toughening mechanisms and it consists of two sub-mechanisms – interfacial debonding of nanoparticles and subsequent plastic yielding of matrix. Multiscale framework of both toughening sub-mechanisms considering interfacial progressive-partial debonding (IPPD) of nanoparticles is constructed. To investigate the effects of the toughening mechanisms by confirming the microscopic stress fields of the nanocomposites, finite element (FE) models that include progressive-partial debonding of interfacial area are constructed. An influence of the area with IPPD on the dissipated plastic energy of matrix domain is investigated. This paper provide insights for applying the IPPD phenomenon in analysis on the toughness enhancement of nanocomposites by considering the results of the multiscale analysis model. | - |
| dc.description.tableofcontents | 1. Introduction 1
2. Methodology and models 7 2.1. Description of the multiscale strategy 7 2.2. Review of fracture toughness enhancement due to uniformly debonded nanoparticles 9 2.3. Fracture toughness enhancement due to IPPD of nanoparticles 10 2.3.1. Preparation of finite element models 10 2.3.2. Quantification of elastic properties of nanocomposites via micromechanics 16 2.3.3. Finite element analysis of representative volume element 17 2.3.4. Quantification of fracture toughness enhancements 18 2.3.4.1. Interfacial debonding-induced fracture toughness enhancement 20 2.3.4.2. Plastic yielding of nanovoids-induced fracture toughness enhancement 21 3. Results and discussion 24 4. Conclusion 27 Appendix 29 References 30 Abstract in Korean 35 | - |
| dc.format | application/pdf | - |
| dc.format.extent | 1434927 bytes | - |
| dc.format.medium | application/pdf | - |
| dc.language.iso | en | - |
| dc.publisher | 서울대학교 대학원 | - |
| dc.subject | Nanocomposites | - |
| dc.subject | Energy dissipation | - |
| dc.subject | Toughening mechanism | - |
| dc.subject | Interfacial progressive-partial debonding | - |
| dc.subject | Multiscale analysis | - |
| dc.subject.ddc | 621 | - |
| dc.title | A study on influences of interfacial progressive-partial debonding on fracture toughness enhancement of polymer nanocomposites: multiscale finite element analysis | - |
| dc.title.alternative | 계면 진전 부분 분리에 따른 폴리머 나노복합재의 인성 향상에 대한 멀티스케일 유한 요소 해석 | - |
| dc.type | Thesis | - |
| dc.contributor.AlternativeAuthor | Han Jin-Gyu | - |
| dc.description.degree | Master | - |
| dc.contributor.affiliation | 공과대학 기계항공공학부 | - |
| dc.date.awarded | 2018-02 | - |
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