Abstract
The objective of the current study is to combine modeling and experimental efforts in fracture mechanics analysis to investigate causal phenomenon behind well-documented toughening effects in nanoparticulate reinforced polymers. Both modeling and experimental techniques are designed to operate on the micro and nano scales of active mechanisms which contribute to fracture property differences. The Extended Finite Element Method (XFEM) advanced fracture analysis technique has been employed. This node enrichment scheme for investigation of arbitrary-path crack propagation enables modeling of tortuous crack propagation with no required pre-knowledge of crack paths or locations. To overcome limitations of this method in investigation of inhomogeneous materials, cohesive interfacial elements have further been introduced, independent of the XFEM enriched domain. This overcomes arbitrary crack arrest issues at material interfaces and improves the critical consideration of the interface between reinforcing particles and the bonding polymer matrix phase with dedicated material properties and interphase treatment. A third method involving element deletion with a refined mesh has also been employed. Polycarbonate with silica inclusions has been computationally investigated. Fracture property assessment using the computational results has been performed. A parallel effort involving nano-scale experimentation under SEM observation has been designed to employ Mode I and Mode II fracture specimens prepared for direct observation of crack growth in a nanoparticulate-reinforced epoxy system.
| Original language | English (US) |
|---|---|
| Title of host publication | 27th Annual Technical Conference of the American Society for Composites 2012, Held Jointly with 15th Joint US-Japan Conference on Composite Materials and ASTM-D30 Meeting |
| Pages | 559-573 |
| Number of pages | 15 |
| State | Published - 2012 |
| Externally published | Yes |
| Event | 27th Annual Technical Conference of the American Society for Composites 2012, Held Jointly with 15th Joint US-Japan Conference on Composite Materials and ASTM-D30 Meeting - Arlington, TX, United States Duration: Oct 1 2012 → Oct 3 2012 |
Other
| Other | 27th Annual Technical Conference of the American Society for Composites 2012, Held Jointly with 15th Joint US-Japan Conference on Composite Materials and ASTM-D30 Meeting |
|---|---|
| Country | United States |
| City | Arlington, TX |
| Period | 10/1/12 → 10/3/12 |
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ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry
Cite this
Nano-scale fracture study of nanoparticulate composites. / Karkkainen, Ryan; Bujanda, A. A.; Walter, T. R.
27th Annual Technical Conference of the American Society for Composites 2012, Held Jointly with 15th Joint US-Japan Conference on Composite Materials and ASTM-D30 Meeting. 2012. p. 559-573.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Nano-scale fracture study of nanoparticulate composites
AU - Karkkainen, Ryan
AU - Bujanda, A. A.
AU - Walter, T. R.
PY - 2012
Y1 - 2012
N2 - The objective of the current study is to combine modeling and experimental efforts in fracture mechanics analysis to investigate causal phenomenon behind well-documented toughening effects in nanoparticulate reinforced polymers. Both modeling and experimental techniques are designed to operate on the micro and nano scales of active mechanisms which contribute to fracture property differences. The Extended Finite Element Method (XFEM) advanced fracture analysis technique has been employed. This node enrichment scheme for investigation of arbitrary-path crack propagation enables modeling of tortuous crack propagation with no required pre-knowledge of crack paths or locations. To overcome limitations of this method in investigation of inhomogeneous materials, cohesive interfacial elements have further been introduced, independent of the XFEM enriched domain. This overcomes arbitrary crack arrest issues at material interfaces and improves the critical consideration of the interface between reinforcing particles and the bonding polymer matrix phase with dedicated material properties and interphase treatment. A third method involving element deletion with a refined mesh has also been employed. Polycarbonate with silica inclusions has been computationally investigated. Fracture property assessment using the computational results has been performed. A parallel effort involving nano-scale experimentation under SEM observation has been designed to employ Mode I and Mode II fracture specimens prepared for direct observation of crack growth in a nanoparticulate-reinforced epoxy system.
AB - The objective of the current study is to combine modeling and experimental efforts in fracture mechanics analysis to investigate causal phenomenon behind well-documented toughening effects in nanoparticulate reinforced polymers. Both modeling and experimental techniques are designed to operate on the micro and nano scales of active mechanisms which contribute to fracture property differences. The Extended Finite Element Method (XFEM) advanced fracture analysis technique has been employed. This node enrichment scheme for investigation of arbitrary-path crack propagation enables modeling of tortuous crack propagation with no required pre-knowledge of crack paths or locations. To overcome limitations of this method in investigation of inhomogeneous materials, cohesive interfacial elements have further been introduced, independent of the XFEM enriched domain. This overcomes arbitrary crack arrest issues at material interfaces and improves the critical consideration of the interface between reinforcing particles and the bonding polymer matrix phase with dedicated material properties and interphase treatment. A third method involving element deletion with a refined mesh has also been employed. Polycarbonate with silica inclusions has been computationally investigated. Fracture property assessment using the computational results has been performed. A parallel effort involving nano-scale experimentation under SEM observation has been designed to employ Mode I and Mode II fracture specimens prepared for direct observation of crack growth in a nanoparticulate-reinforced epoxy system.
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UR - http://www.scopus.com/inward/citedby.url?scp=84874456931&partnerID=8YFLogxK
M3 - Conference contribution
SN - 9781622764389
SP - 559
EP - 573
BT - 27th Annual Technical Conference of the American Society for Composites 2012, Held Jointly with 15th Joint US-Japan Conference on Composite Materials and ASTM-D30 Meeting
ER -