Failure location effects on slow crack growth parameter estimates
Abstract As part of Roman Space Telescope component development, the slow crack growth (SCG) parameters of a glass were measured using constant stress rate testing of ASTM C1161 beams. Failures occurred on the faces, bevels and sides of the test specimens thereby providing an opportunity to examine...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2024-01-01
|
| Series: | International Journal of Ceramic Engineering & Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ces2.10195 |
| _version_ | 1797349607149142016 |
|---|---|
| author | Jonathan Salem Pappu L. N. Murthy |
| author_facet | Jonathan Salem Pappu L. N. Murthy |
| author_sort | Jonathan Salem |
| collection | DOAJ |
| description | Abstract As part of Roman Space Telescope component development, the slow crack growth (SCG) parameters of a glass were measured using constant stress rate testing of ASTM C1161 beams. Failures occurred on the faces, bevels and sides of the test specimens thereby providing an opportunity to examine the effects of failure location on SCG parameter estimates. Censoring of the data by location did not have a statistically significant effect on the slow crack growth parameter estimates. Linear and nonlinear fits were also made to various strength estimators. Nonlinear fits gave slightly lower estimates of the parameters. The main influence on parameter estimates was a low strength, infrequent flaw population. Exponential model parameters were estimated via swarm optimization. |
| first_indexed | 2024-03-08T12:32:44Z |
| format | Article |
| id | doaj.art-c9daa462ad4e46a585aafbe1306802b0 |
| institution | Directory Open Access Journal |
| issn | 2578-3270 |
| language | English |
| last_indexed | 2024-03-08T12:32:44Z |
| publishDate | 2024-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Ceramic Engineering & Science |
| spelling | doaj.art-c9daa462ad4e46a585aafbe1306802b02024-01-22T01:49:13ZengWileyInternational Journal of Ceramic Engineering & Science2578-32702024-01-0161n/an/a10.1002/ces2.10195Failure location effects on slow crack growth parameter estimatesJonathan Salem0Pappu L. N. Murthy1NASA Glenn Research Center Cleveland Ohio USANASA Glenn Research Center Cleveland Ohio USAAbstract As part of Roman Space Telescope component development, the slow crack growth (SCG) parameters of a glass were measured using constant stress rate testing of ASTM C1161 beams. Failures occurred on the faces, bevels and sides of the test specimens thereby providing an opportunity to examine the effects of failure location on SCG parameter estimates. Censoring of the data by location did not have a statistically significant effect on the slow crack growth parameter estimates. Linear and nonlinear fits were also made to various strength estimators. Nonlinear fits gave slightly lower estimates of the parameters. The main influence on parameter estimates was a low strength, infrequent flaw population. Exponential model parameters were estimated via swarm optimization.https://doi.org/10.1002/ces2.10195exponential lawfatiguefractographyfracture toughnessglasspower law |
| spellingShingle | Jonathan Salem Pappu L. N. Murthy Failure location effects on slow crack growth parameter estimates International Journal of Ceramic Engineering & Science exponential law fatigue fractography fracture toughness glass power law |
| title | Failure location effects on slow crack growth parameter estimates |
| title_full | Failure location effects on slow crack growth parameter estimates |
| title_fullStr | Failure location effects on slow crack growth parameter estimates |
| title_full_unstemmed | Failure location effects on slow crack growth parameter estimates |
| title_short | Failure location effects on slow crack growth parameter estimates |
| title_sort | failure location effects on slow crack growth parameter estimates |
| topic | exponential law fatigue fractography fracture toughness glass power law |
| url | https://doi.org/10.1002/ces2.10195 |
| work_keys_str_mv | AT jonathansalem failurelocationeffectsonslowcrackgrowthparameterestimates AT pappulnmurthy failurelocationeffectsonslowcrackgrowthparameterestimates |