2026-09-20T21:54:06Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/20445 2023-07-10 col_2142_5131 col_2142_14787 com_2142_5130 com_2142_9630 com_2142_234

http://hdl.handle.net/2142/20445 eng Copyright 1993 Sandstrom, Chad Richard Engineering, Mechanical Tucker, Charles L., III Sandstrom, Chad Richard 2011-05-07T12:39:23Z 2011-05-07T12:39:23Z 2013-09-09T14:58:54Z 1993 A theory for the processing-induced fiber orientation and stress in fiber reinforced-polymer composites is presented. Short-fiber-reinforced polymer composites are represented by concentrated suspensions of rigid rods. In concentrated suspensions, fiber-fiber contact is likely and affects the fiber orientation state and suspension rheology. Fiber orientation is given as a function of the strain in the continuum and the probable effects of physical inter-fiber contact. Continuum stress is calculated from the stress in the fluid and fibers, where fiber stress is a result of the local disturbance in the fluid velocity field and of the inter-fiber contact forces. Fiber orientation is described via probability density function whose transport equation has the form of a generalized advection-diffusion equation with a orientation dependent diffusion. This equation is solved using a finite difference scheme and the results are presented versus experiments with suspensions with planar orientation in planar stretching flow. Experiments and simulation agree that increasing concentrations result in increased interaction-based diffusion. Made available in DSpace on 2011-05-07T12:39:23Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9329153.pdf: 5530617 bytes, checksum: 08d869b6f287ea28601f0f671200092a (MD5) Previous issue date: 1993 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:43:56Z Item is restricted indefinitely. Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2013-09-09T14:58:53Z Item was in collections: University of Illinois Dissertations and Theses (ID: 204) Dissertations and Theses - Mechanical Science and Engineering (ID: 675) No. of bitstreams: 3 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9329153.pdf: 5530617 bytes, checksum: 08d869b6f287ea28601f0f671200092a (MD5) 9329153.pdf.txt: 195708 bytes, checksum: 7073a803eece4862bc507201af2e155a (MD5) Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2013-09-09T14:58:54Z Author request Open Access via email on 09/08/2013 sshreeve AAI9329153 (UMI)AAI9329153 Interactions and orientation in concentrated suspensions of rigid rods: Theory and experiment text Mechanical Science and Engineering Mechanical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.