Ratcheting in structural adhesives
When adhesively bonded joints are subjected to a cyclic load, they will primarily behave viscoelastically. Under certain loading conditions, they can also experience permanent deformation, or ratcheting. This research considered loading conditions that result in ratcheting for a toughened and standa...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2021-05-01
|
| Series: | Polymer Testing |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941821001045 |
| _version_ | 1818846724189323264 |
|---|---|
| author | Michael Krause Lloyd Smith |
| author_facet | Michael Krause Lloyd Smith |
| author_sort | Michael Krause |
| collection | DOAJ |
| description | When adhesively bonded joints are subjected to a cyclic load, they will primarily behave viscoelastically. Under certain loading conditions, they can also experience permanent deformation, or ratcheting. This research considered loading conditions that result in ratcheting for a toughened and standard adhesive in scarf joint coupons. Adhesive strain was measured using edge mounted resistance strain gages that was verified with digital image correlation. At low stress levels both adhesives exhibited a purely viscoelastic response. At high stress levels, the standard adhesive exhibited a viscoelastic response in tension-tension and a ratcheting response under reversed loading. At high stress levels the toughened adhesive exhibited ratcheting during tension-tension and reversed loading with higher ratcheting strain in tests that involved reversed loading. Enhanced ratcheting during reversed loading is consistent with a kinematic hardening response, which these adhesives have been shown to follow. |
| first_indexed | 2024-12-19T05:50:06Z |
| format | Article |
| id | doaj.art-c3d71d29d9dc47d8b7342d8ba7d51973 |
| institution | Directory Open Access Journal |
| issn | 0142-9418 |
| language | English |
| last_indexed | 2024-12-19T05:50:06Z |
| publishDate | 2021-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Polymer Testing |
| spelling | doaj.art-c3d71d29d9dc47d8b7342d8ba7d519732022-12-21T20:33:40ZengElsevierPolymer Testing0142-94182021-05-0197107154Ratcheting in structural adhesivesMichael Krause0Lloyd Smith1School of Mechanical and Materials Engineering, Washington State University, 355 NE Spokane St, Pullman, WA, 99163, United StatesCorresponding author.; School of Mechanical and Materials Engineering, Washington State University, 355 NE Spokane St, Pullman, WA, 99163, United StatesWhen adhesively bonded joints are subjected to a cyclic load, they will primarily behave viscoelastically. Under certain loading conditions, they can also experience permanent deformation, or ratcheting. This research considered loading conditions that result in ratcheting for a toughened and standard adhesive in scarf joint coupons. Adhesive strain was measured using edge mounted resistance strain gages that was verified with digital image correlation. At low stress levels both adhesives exhibited a purely viscoelastic response. At high stress levels, the standard adhesive exhibited a viscoelastic response in tension-tension and a ratcheting response under reversed loading. At high stress levels the toughened adhesive exhibited ratcheting during tension-tension and reversed loading with higher ratcheting strain in tests that involved reversed loading. Enhanced ratcheting during reversed loading is consistent with a kinematic hardening response, which these adhesives have been shown to follow.http://www.sciencedirect.com/science/article/pii/S0142941821001045ViscoelasticPermanent deformationAdhesivesRatcheting |
| spellingShingle | Michael Krause Lloyd Smith Ratcheting in structural adhesives Polymer Testing Viscoelastic Permanent deformation Adhesives Ratcheting |
| title | Ratcheting in structural adhesives |
| title_full | Ratcheting in structural adhesives |
| title_fullStr | Ratcheting in structural adhesives |
| title_full_unstemmed | Ratcheting in structural adhesives |
| title_short | Ratcheting in structural adhesives |
| title_sort | ratcheting in structural adhesives |
| topic | Viscoelastic Permanent deformation Adhesives Ratcheting |
| url | http://www.sciencedirect.com/science/article/pii/S0142941821001045 |
| work_keys_str_mv | AT michaelkrause ratchetinginstructuraladhesives AT lloydsmith ratchetinginstructuraladhesives |