An experimental study of the dynamic features of shadow areas of caustics in response to loading/unloading fracture
Using a plexiglass sample and by means of real-time holographic interferometry and shadow optical method of caustics, the different features of dynamic variation in stress (strain) field, plastic area and nucleation zone (shadow area) when the sample fractures during loading (loading-fracture) and u...
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| Veröffentlicht in: | Acta seismologica sinica 2002-03, Vol.15 (2), p.198-209 |
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| creator | Xu, Zhao-yong Yang, Run-hai Zhao, Jin-ming Wang, Yun-yun Xiong, Bing-heng Wang, Zheng-rong Mei, Shi-rong |
| description | Using a plexiglass sample and by means of real-time holographic interferometry and shadow optical method of caustics, the different features of dynamic variation in stress (strain) field, plastic area and nucleation zone (shadow area) when the sample fractures during loading (loading-fracture) and unloading (unloading-fracture) are studied visually. The results show that the strain nuclei (zones with dense fringes) appear first at the tips of prefabricated cracks at low stress, and then the shadow areas of caustics form with the increase of load. These nuclei and shadow areas can become larger, or smaller, when the process of loading, or unloading, goes on. When the stress is kept within a certain range, the shadow areas of caustics can become larger and smaller alternatively with repeated loading and unloading (cyclic loading). However, when loading and unloading at high stress, in particular when the macrofracture is about to appear, the variations of the shadow areas of caustics are irreversible and quite different. The shadow areas of caustics expand rapidly at an increasing speed when loading-fracture appears. In contrast, the shadow areas of caustics expand at a lower speed when unloading-fracture appears; besides, there is a circular shadow in front of the sharp-angle shaped area. |
| doi_str_mv | 10.1007/s11589-002-0009-y |
| format | Article |
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The results show that the strain nuclei (zones with dense fringes) appear first at the tips of prefabricated cracks at low stress, and then the shadow areas of caustics form with the increase of load. These nuclei and shadow areas can become larger, or smaller, when the process of loading, or unloading, goes on. When the stress is kept within a certain range, the shadow areas of caustics can become larger and smaller alternatively with repeated loading and unloading (cyclic loading). However, when loading and unloading at high stress, in particular when the macrofracture is about to appear, the variations of the shadow areas of caustics are irreversible and quite different. The shadow areas of caustics expand rapidly at an increasing speed when loading-fracture appears. In contrast, the shadow areas of caustics expand at a lower speed when unloading-fracture appears; besides, there is a circular shadow in front of the sharp-angle shaped area.</description><identifier>ISSN: 1000-9116</identifier><identifier>ISSN: 1674-4519</identifier><identifier>EISSN: 1993-1344</identifier><identifier>EISSN: 1867-8777</identifier><identifier>DOI: 10.1007/s11589-002-0009-y</identifier><language>eng</language><publisher>Beijing: Springer Nature B.V</publisher><subject>Alkalies ; areas ; Caustics ; dynamic ; Dynamic tests ; Dynamics ; field ; Fracture mechanics ; Fractures ; Interferometry ; loading-fracture ; Loads (forces) ; Printing machinery ; shadow ; Shadows ; Strain ; stress ; Stresses ; unloading-fracture</subject><ispartof>Acta seismologica sinica, 2002-03, Vol.15 (2), p.198-209</ispartof><rights>Acta Seismologica Sinica 2002</rights><rights>Copyright © Wanfang Data Co. Ltd. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a3039-1a3b7d61e239bca94597020efc6348b59736aa792d4caac4c2a5aa3913b392d13</citedby><cites>FETCH-LOGICAL-a3039-1a3b7d61e239bca94597020efc6348b59736aa792d4caac4c2a5aa3913b392d13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/86256X/86256X.jpg</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Xu, Zhao-yong</creatorcontrib><creatorcontrib>Yang, Run-hai</creatorcontrib><creatorcontrib>Zhao, Jin-ming</creatorcontrib><creatorcontrib>Wang, Yun-yun</creatorcontrib><creatorcontrib>Xiong, Bing-heng</creatorcontrib><creatorcontrib>Wang, Zheng-rong</creatorcontrib><creatorcontrib>Mei, Shi-rong</creatorcontrib><title>An experimental study of the dynamic features of shadow areas of caustics in response to loading/unloading fracture</title><title>Acta seismologica sinica</title><addtitle>Acta Seismologica Sinica(English Edition)</addtitle><description>Using a plexiglass sample and by means of real-time holographic interferometry and shadow optical method of caustics, the different features of dynamic variation in stress (strain) field, plastic area and nucleation zone (shadow area) when the sample fractures during loading (loading-fracture) and unloading (unloading-fracture) are studied visually. The results show that the strain nuclei (zones with dense fringes) appear first at the tips of prefabricated cracks at low stress, and then the shadow areas of caustics form with the increase of load. These nuclei and shadow areas can become larger, or smaller, when the process of loading, or unloading, goes on. When the stress is kept within a certain range, the shadow areas of caustics can become larger and smaller alternatively with repeated loading and unloading (cyclic loading). However, when loading and unloading at high stress, in particular when the macrofracture is about to appear, the variations of the shadow areas of caustics are irreversible and quite different. The shadow areas of caustics expand rapidly at an increasing speed when loading-fracture appears. In contrast, the shadow areas of caustics expand at a lower speed when unloading-fracture appears; besides, there is a circular shadow in front of the sharp-angle shaped area.</description><subject>Alkalies</subject><subject>areas</subject><subject>Caustics</subject><subject>dynamic</subject><subject>Dynamic tests</subject><subject>Dynamics</subject><subject>field</subject><subject>Fracture mechanics</subject><subject>Fractures</subject><subject>Interferometry</subject><subject>loading-fracture</subject><subject>Loads (forces)</subject><subject>Printing 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Edition)</addtitle><date>2002-03-01</date><risdate>2002</risdate><volume>15</volume><issue>2</issue><spage>198</spage><epage>209</epage><pages>198-209</pages><issn>1000-9116</issn><issn>1674-4519</issn><eissn>1993-1344</eissn><eissn>1867-8777</eissn><abstract>Using a plexiglass sample and by means of real-time holographic interferometry and shadow optical method of caustics, the different features of dynamic variation in stress (strain) field, plastic area and nucleation zone (shadow area) when the sample fractures during loading (loading-fracture) and unloading (unloading-fracture) are studied visually. The results show that the strain nuclei (zones with dense fringes) appear first at the tips of prefabricated cracks at low stress, and then the shadow areas of caustics form with the increase of load. These nuclei and shadow areas can become larger, or smaller, when the process of loading, or unloading, goes on. When the stress is kept within a certain range, the shadow areas of caustics can become larger and smaller alternatively with repeated loading and unloading (cyclic loading). However, when loading and unloading at high stress, in particular when the macrofracture is about to appear, the variations of the shadow areas of caustics are irreversible and quite different. The shadow areas of caustics expand rapidly at an increasing speed when loading-fracture appears. In contrast, the shadow areas of caustics expand at a lower speed when unloading-fracture appears; besides, there is a circular shadow in front of the sharp-angle shaped area.</abstract><cop>Beijing</cop><pub>Springer Nature B.V</pub><doi>10.1007/s11589-002-0009-y</doi><tpages>12</tpages></addata></record> |
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| ispartof | Acta seismologica sinica, 2002-03, Vol.15 (2), p.198-209 |
| issn | 1000-9116 1674-4519 1993-1344 1867-8777 |
| language | eng |
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| source | Alma/SFX Local Collection; SpringerLink Journals - AutoHoldings |
| subjects | Alkalies areas Caustics dynamic Dynamic tests Dynamics field Fracture mechanics Fractures Interferometry loading-fracture Loads (forces) Printing machinery shadow Shadows Strain stress Stresses unloading-fracture |
| title | An experimental study of the dynamic features of shadow areas of caustics in response to loading/unloading fracture |
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