NICOP - Understanding and modeling stress-diffusion coupling effects in carbon fiber reinforced marine composites
Abstract
While there is now reasonable understanding of the effects of water on marine composites, theinfluence of the combined actions of water and mechanical loading on long term performance is still agray area. However, under realistic loading conditions most Navy structures such as ships andsubmarines are subjected to water immersion and mechanical loads simultaneously. In Phase 1 of thisproject it was clearly shown by an extensive test program that mechanical loads applied to immersedstructures lead to accelerated failure when compared to immersion and the same loads appliedsequentially. The project proposed here will build on that experimental data-set to develop modelingtools which will take account of the coupling between water and applied stress. Various models forwater diffusion kinetics are available, and can be identified by weight measurements. Mechanicaldamage effects can also be characterized using image analysis and X-ray tomography techniques. Amodel will be programmed which will simulate both water ingress and damage development,separately and combined, to predict the long term behavior of Navy composites. Predictions will bevalidated by comparison with long term test data.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 19, 2018
- Source ID
- N629091812171
Entities
People
- Peter Davies
Organizations
- Office of Naval Research
- United States Navy