Relaxation phenomenon in epoxy glass aged under post-yield strain
Relaxation phenomenon in epoxy glass aged under shear strain larger than an upper yield point was studied. After aged under post‐yield strain for various aging periods, cylindrical specimens of epoxy glass were twisted clockwise (in the same direction as the prestrain) or counterclockwise (the oppos...
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| Veröffentlicht in: | Polymer engineering and science 2006-05, Vol.46 (5), p.630-634 |
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| creator | Kawakami, Hiroshi Souda, Kazuki Nanzai, Yukuo |
| description | Relaxation phenomenon in epoxy glass aged under shear strain larger than an upper yield point was studied. After aged under post‐yield strain for various aging periods, cylindrical specimens of epoxy glass were twisted clockwise (in the same direction as the prestrain) or counterclockwise (the opposite direction to the direction of the prestrain). The evolution of yield points was significantly different from that of the specimens aged under preyield strain. There exist two knee‐like yield points on stress–strain curves of specimens twisted counterclockwise: one evolved toward to an upper yield point and merged the other knee‐like yield point whose stress value was almost independent of aging time. On the basis of the experimental results, we proposed a combined relaxation model of two relaxation mechanisms: one is relaxation results in an isotropic structure whose center in stress space is the stress value in the terminal zone and the other is kinetic relaxation of the isotropic center. The combined relaxation indicated the possibility of phase transition caused by postyield strain, and therefore the higher yield stress than that of an annealed specimen was not resulted from strain‐accelerated aging, but presumably resulted from a structural change under postyield strain. POLYM. ENG. SCI. 46:630–634, 2006. © 2006 Society of Plastics Engineers |
| doi_str_mv | 10.1002/pen.20493 |
| format | Article |
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After aged under post‐yield strain for various aging periods, cylindrical specimens of epoxy glass were twisted clockwise (in the same direction as the prestrain) or counterclockwise (the opposite direction to the direction of the prestrain). The evolution of yield points was significantly different from that of the specimens aged under preyield strain. There exist two knee‐like yield points on stress–strain curves of specimens twisted counterclockwise: one evolved toward to an upper yield point and merged the other knee‐like yield point whose stress value was almost independent of aging time. On the basis of the experimental results, we proposed a combined relaxation model of two relaxation mechanisms: one is relaxation results in an isotropic structure whose center in stress space is the stress value in the terminal zone and the other is kinetic relaxation of the isotropic center. The combined relaxation indicated the possibility of phase transition caused by postyield strain, and therefore the higher yield stress than that of an annealed specimen was not resulted from strain‐accelerated aging, but presumably resulted from a structural change under postyield strain. POLYM. ENG. SCI. 46:630–634, 2006. © 2006 Society of Plastics Engineers</description><identifier>ISSN: 0032-3888</identifier><identifier>EISSN: 1548-2634</identifier><identifier>DOI: 10.1002/pen.20493</identifier><identifier>CODEN: PYESAZ</identifier><language>eng</language><publisher>Hoboken: Wiley Subscription Services, Inc., A Wiley Company</publisher><subject>Applied sciences ; Epoxy compounds ; Epoxy resins ; Exact sciences and technology ; Fiberglass ; Organic polymers ; Physicochemistry of polymers ; Properties and characterization ; Relaxation phenomena ; Shear strain ; Shear tests ; Stress relaxation ; Structure ; Thermal and thermodynamic properties</subject><ispartof>Polymer engineering and science, 2006-05, Vol.46 (5), p.630-634</ispartof><rights>Copyright © 2006 Society of Plastics Engineers</rights><rights>2007 INIST-CNRS</rights><rights>COPYRIGHT 2006 Society of Plastics Engineers, Inc.</rights><rights>Copyright Society of Plastics Engineers May 2006</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c6093-1886991eab4f1335d00406f452e92f437c6fdf5a29ad20017b4cf0c60081eef13</citedby><cites>FETCH-LOGICAL-c6093-1886991eab4f1335d00406f452e92f437c6fdf5a29ad20017b4cf0c60081eef13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fpen.20493$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fpen.20493$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27901,27902,45550,45551</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=17728010$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Kawakami, Hiroshi</creatorcontrib><creatorcontrib>Souda, Kazuki</creatorcontrib><creatorcontrib>Nanzai, Yukuo</creatorcontrib><title>Relaxation phenomenon in epoxy glass aged under post-yield strain</title><title>Polymer engineering and science</title><addtitle>Polym Eng Sci</addtitle><description>Relaxation phenomenon in epoxy glass aged under shear strain larger than an upper yield point was studied. After aged under post‐yield strain for various aging periods, cylindrical specimens of epoxy glass were twisted clockwise (in the same direction as the prestrain) or counterclockwise (the opposite direction to the direction of the prestrain). The evolution of yield points was significantly different from that of the specimens aged under preyield strain. There exist two knee‐like yield points on stress–strain curves of specimens twisted counterclockwise: one evolved toward to an upper yield point and merged the other knee‐like yield point whose stress value was almost independent of aging time. On the basis of the experimental results, we proposed a combined relaxation model of two relaxation mechanisms: one is relaxation results in an isotropic structure whose center in stress space is the stress value in the terminal zone and the other is kinetic relaxation of the isotropic center. The combined relaxation indicated the possibility of phase transition caused by postyield strain, and therefore the higher yield stress than that of an annealed specimen was not resulted from strain‐accelerated aging, but presumably resulted from a structural change under postyield strain. POLYM. ENG. SCI. 46:630–634, 2006. © 2006 Society of Plastics Engineers</description><subject>Applied sciences</subject><subject>Epoxy compounds</subject><subject>Epoxy resins</subject><subject>Exact sciences and technology</subject><subject>Fiberglass</subject><subject>Organic polymers</subject><subject>Physicochemistry of polymers</subject><subject>Properties and characterization</subject><subject>Relaxation phenomena</subject><subject>Shear strain</subject><subject>Shear tests</subject><subject>Stress relaxation</subject><subject>Structure</subject><subject>Thermal and thermodynamic properties</subject><issn>0032-3888</issn><issn>1548-2634</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>BENPR</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp1kV9rFDEUxYMouFYf_AaDoODDbPNvZpLHZaltYaml2ta3kM7cjKnZZExmcPfbm7qrUlkJIXD5ncO5OQi9JnhOMKbHA_g5xVyyJ2hGKi5KWjP-FM0wZrRkQojn6EVK9zizrJIztLgCpzd6tMEXw1fwYZ2vL6wvYAibbdE7nVKhe-iKyXcQiyGksdxacF2Rxqitf4meGe0SvNq_R-j6w8nn5Vm5-nh6vlysyrbGkpVEiFpKAvqOG8JY1WHMcW14RUFSw1nT1qYzlaZSdxRj0tzx1uCsxYIAZMkRerfzHWL4PkEa1dqmFpzTHsKUFKuJkJI3GXzzD3gfpuhzNkWJqEklCM1QuYN67UBZb0Jepu3BQ9QueDA2jxeE14Q0FX0wnR_g8-lgbduDgvePBJkZYTP2ekpJnX-6Osi2MaQUwagh2rWOW0WweqhV5VrVr1oz-3a_nU6tdiZq39r0V9A0VGCCM3e8437kYNv_G6rLk4vfzvsvsSkn_aPQ8ZuqG9ZU6vbiVN184Sshz27Ukv0ECgW8nA</recordid><startdate>200605</startdate><enddate>200605</enddate><creator>Kawakami, Hiroshi</creator><creator>Souda, Kazuki</creator><creator>Nanzai, Yukuo</creator><general>Wiley Subscription Services, Inc., A Wiley Company</general><general>Wiley Subscription Services</general><general>Society of Plastics Engineers, Inc</general><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>ISR</scope><scope>3V.</scope><scope>7SR</scope><scope>7XB</scope><scope>88I</scope><scope>8AF</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8G5</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>L6V</scope><scope>M2O</scope><scope>M2P</scope><scope>M7S</scope><scope>MBDVC</scope><scope>P5Z</scope><scope>P62</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>Q9U</scope><scope>S0X</scope></search><sort><creationdate>200605</creationdate><title>Relaxation phenomenon in epoxy glass aged under post-yield strain</title><author>Kawakami, Hiroshi ; Souda, Kazuki ; Nanzai, Yukuo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c6093-1886991eab4f1335d00406f452e92f437c6fdf5a29ad20017b4cf0c60081eef13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Applied sciences</topic><topic>Epoxy compounds</topic><topic>Epoxy resins</topic><topic>Exact sciences and technology</topic><topic>Fiberglass</topic><topic>Organic polymers</topic><topic>Physicochemistry of polymers</topic><topic>Properties and characterization</topic><topic>Relaxation phenomena</topic><topic>Shear strain</topic><topic>Shear tests</topic><topic>Stress relaxation</topic><topic>Structure</topic><topic>Thermal and thermodynamic properties</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kawakami, Hiroshi</creatorcontrib><creatorcontrib>Souda, Kazuki</creatorcontrib><creatorcontrib>Nanzai, Yukuo</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Gale In Context: Science</collection><collection>ProQuest Central (Corporate)</collection><collection>Engineered Materials Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM Database</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>ProQuest Engineering Collection</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Engineering Database</collection><collection>Research Library (Corporate)</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Materials Science Collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>ProQuest Central Basic</collection><collection>SIRS Editorial</collection><jtitle>Polymer engineering and science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kawakami, Hiroshi</au><au>Souda, Kazuki</au><au>Nanzai, Yukuo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Relaxation phenomenon in epoxy glass aged under post-yield strain</atitle><jtitle>Polymer engineering and science</jtitle><addtitle>Polym Eng Sci</addtitle><date>2006-05</date><risdate>2006</risdate><volume>46</volume><issue>5</issue><spage>630</spage><epage>634</epage><pages>630-634</pages><issn>0032-3888</issn><eissn>1548-2634</eissn><coden>PYESAZ</coden><abstract>Relaxation phenomenon in epoxy glass aged under shear strain larger than an upper yield point was studied. After aged under post‐yield strain for various aging periods, cylindrical specimens of epoxy glass were twisted clockwise (in the same direction as the prestrain) or counterclockwise (the opposite direction to the direction of the prestrain). The evolution of yield points was significantly different from that of the specimens aged under preyield strain. There exist two knee‐like yield points on stress–strain curves of specimens twisted counterclockwise: one evolved toward to an upper yield point and merged the other knee‐like yield point whose stress value was almost independent of aging time. On the basis of the experimental results, we proposed a combined relaxation model of two relaxation mechanisms: one is relaxation results in an isotropic structure whose center in stress space is the stress value in the terminal zone and the other is kinetic relaxation of the isotropic center. The combined relaxation indicated the possibility of phase transition caused by postyield strain, and therefore the higher yield stress than that of an annealed specimen was not resulted from strain‐accelerated aging, but presumably resulted from a structural change under postyield strain. POLYM. ENG. SCI. 46:630–634, 2006. © 2006 Society of Plastics Engineers</abstract><cop>Hoboken</cop><pub>Wiley Subscription Services, Inc., A Wiley Company</pub><doi>10.1002/pen.20493</doi><tpages>5</tpages></addata></record> |
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| ispartof | Polymer engineering and science, 2006-05, Vol.46 (5), p.630-634 |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Applied sciences Epoxy compounds Epoxy resins Exact sciences and technology Fiberglass Organic polymers Physicochemistry of polymers Properties and characterization Relaxation phenomena Shear strain Shear tests Stress relaxation Structure Thermal and thermodynamic properties |
| title | Relaxation phenomenon in epoxy glass aged under post-yield strain |
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