Safety envelope for load tolerance of structural element design based on multi-stage testing
Structural elements, such as stiffened panels and lap joints, are basic components of aircraft structures. For aircraft structural design, designers select predesigned elements satisfying the design load requirement based on their load-carrying capabilities. Therefore, estimation of safety envelope...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2016-09-01
|
| Series: | Advances in Mechanical Engineering |
| Online Access: | https://doi.org/10.1177/1687814016668140 |
| _version_ | 1818323072757792768 |
|---|---|
| author | Chanyoung Park Nam H Kim |
| author_facet | Chanyoung Park Nam H Kim |
| author_sort | Chanyoung Park |
| collection | DOAJ |
| description | Structural elements, such as stiffened panels and lap joints, are basic components of aircraft structures. For aircraft structural design, designers select predesigned elements satisfying the design load requirement based on their load-carrying capabilities. Therefore, estimation of safety envelope of structural elements for load tolerances would be a good investment for design purpose. In this article, a method of estimating safety envelope is presented using probabilistic classification, which can estimate a specific level of failure probability under both aleatory and epistemic uncertainties. An important contribution of this article is that the calculation uncertainty is reflected in building a safety envelope using Gaussian process, and the effect of element test data on reducing the calculation uncertainty is incorporated by updating the Gaussian process model with the element test data. It is shown that even one element test can significantly reduce the calculation uncertainty due to lacking knowledge of actual physics, so that conservativeness in a safety envelope is significantly reduced. The proposed approach was demonstrated with a cantilever beam example, which represents a structural element. The example shows that calculation uncertainty provides about 93% conservativeness against the uncertainty due to a few element tests. It is shown that even a single element test can increase the load tolerance modeled with the safety envelope by 20%. |
| first_indexed | 2024-12-13T11:06:53Z |
| format | Article |
| id | doaj.art-c7e4265fceec43c2882abf8f35391734 |
| institution | Directory Open Access Journal |
| issn | 1687-8140 |
| language | English |
| last_indexed | 2024-12-13T11:06:53Z |
| publishDate | 2016-09-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Advances in Mechanical Engineering |
| spelling | doaj.art-c7e4265fceec43c2882abf8f353917342022-12-21T23:48:58ZengSAGE PublishingAdvances in Mechanical Engineering1687-81402016-09-01810.1177/1687814016668140Safety envelope for load tolerance of structural element design based on multi-stage testingChanyoung ParkNam H KimStructural elements, such as stiffened panels and lap joints, are basic components of aircraft structures. For aircraft structural design, designers select predesigned elements satisfying the design load requirement based on their load-carrying capabilities. Therefore, estimation of safety envelope of structural elements for load tolerances would be a good investment for design purpose. In this article, a method of estimating safety envelope is presented using probabilistic classification, which can estimate a specific level of failure probability under both aleatory and epistemic uncertainties. An important contribution of this article is that the calculation uncertainty is reflected in building a safety envelope using Gaussian process, and the effect of element test data on reducing the calculation uncertainty is incorporated by updating the Gaussian process model with the element test data. It is shown that even one element test can significantly reduce the calculation uncertainty due to lacking knowledge of actual physics, so that conservativeness in a safety envelope is significantly reduced. The proposed approach was demonstrated with a cantilever beam example, which represents a structural element. The example shows that calculation uncertainty provides about 93% conservativeness against the uncertainty due to a few element tests. It is shown that even a single element test can increase the load tolerance modeled with the safety envelope by 20%.https://doi.org/10.1177/1687814016668140 |
| spellingShingle | Chanyoung Park Nam H Kim Safety envelope for load tolerance of structural element design based on multi-stage testing Advances in Mechanical Engineering |
| title | Safety envelope for load tolerance of structural element design based on multi-stage testing |
| title_full | Safety envelope for load tolerance of structural element design based on multi-stage testing |
| title_fullStr | Safety envelope for load tolerance of structural element design based on multi-stage testing |
| title_full_unstemmed | Safety envelope for load tolerance of structural element design based on multi-stage testing |
| title_short | Safety envelope for load tolerance of structural element design based on multi-stage testing |
| title_sort | safety envelope for load tolerance of structural element design based on multi stage testing |
| url | https://doi.org/10.1177/1687814016668140 |
| work_keys_str_mv | AT chanyoungpark safetyenvelopeforloadtoleranceofstructuralelementdesignbasedonmultistagetesting AT namhkim safetyenvelopeforloadtoleranceofstructuralelementdesignbasedonmultistagetesting |