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http://dspace.mediu.edu.my:8181/xmlui/handle/1721.1/3660Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.creator | Anand, Lallit | - |
| dc.date | 2003-11-10T19:24:07Z | - |
| dc.date | 2003-11-10T19:24:07Z | - |
| dc.date | 2003-01 | - |
| dc.date.accessioned | 2013-10-09T02:31:50Z | - |
| dc.date.available | 2013-10-09T02:31:50Z | - |
| dc.date.issued | 2013-10-09 | - |
| dc.identifier | http://hdl.handle.net/1721.1/3660 | - |
| dc.identifier.uri | http://koha.mediu.edu.my:8181/xmlui/handle/1721 | - |
| dc.description | This paper summarizes a recently developed continuum theory for the elastic-viscoplastic deformation of amorphous solids such as polymeric and metallic glasses. Introducing an internal-state variable that represents the local free-volume associated with certain metastable states, we are able to capture the highly non-linear stress-strain behavior that precedes the yield-peak and gives rise to post-yield strain-softening. Our theory explicitly accounts for the dependence of the Helmholtz free energy on the plastic deformation in a thermodynamically consistent manner. This dependence leads directly to a backstress in the underlying flow rule, and allows us to model the rapid strain-hardening response after the initial yield-drop in monotonic deformations, as well as the Bauschinger-type reverse-yielding phenomena typically observed in amorphous polymeric solids upon unloading after large plastic deformations. We have implemented a special set of constitutive equations resulting from the general theory in a finite-element computer program. Using this finite-element program, we apply the specialized equations to model the large-deformation response of the amorphous polymeric solid polycarbonate, at ambient temperature and pressure. We show numerical results to some representative problems, and compare them against corresponding results from physical experiments. | - |
| dc.description | Singapore-MIT Alliance (SMA) | - |
| dc.format | 211086 bytes | - |
| dc.format | application/pdf | - |
| dc.language | en_US | - |
| dc.relation | Advanced Materials for Micro- and Nano-Systems (AMMNS); | - |
| dc.subject | amorphous solids | - |
| dc.subject | metallic glasses | - |
| dc.subject | plasticity | - |
| dc.subject | polymeric glasses | - |
| dc.title | A continuum theory of amorphous solids undergoing large deformations, with application to polymeric glasses | - |
| dc.type | Article | - |
| Appears in Collections: | MIT Items | |
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