Coupled simulation of hygrothermal aging effects on residual strength of open hole composite laminates

Kevin H. Hoos, J. Scott Mcquien, Kishore Pochiraju, Endel V. Iarve, Carl Rousseau, Stephen Engelstad, David H. Mollenhauer

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Rx-FEM methodology was extended to progressive damage analysis in laminated composites in a range of moisture exposure and elevated temperature conditions. The mechanical property dependence was experimentally determined in independent testing and used as input characteristics as a function of moisture distribution and temperature. Moisture diffusion modeling in the presence of evolving matrix cracking and delaminations was performed to capture the moisture intake through additional pathways created by damage. A tensile fatigue loading of a [60/0/-60]s CFRP laminate under amplitude of 0.9 static strength at R=0.1 was considered with 1 hour hold every 3600 cycles in saturated moisture conditions. The damage patterns and moisture content profiles showed strong correlation. Overall, however, the comparison of coupled simulations with constant dry and saturated property simulation showed only a very small effect of moisture at room temperature loading and a discernible effect on residual strength within the range of analysis performed.

Original languageEnglish
Title of host publicationAIAA Scitech 2020 Forum
DOIs
StatePublished - 2020
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: 6 Jan 202010 Jan 2020

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF

Conference

ConferenceAIAA Scitech Forum, 2020
Country/TerritoryUnited States
CityOrlando
Period6/01/2010/01/20

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