Crack initiation and crack propagation of marine composites subjected to impact loading under extreme
Abstract
The overall goal of the proposed effort is to develop an understanding and ability to predict the dynamic response and mechanisms behind failure of marine composites subjected to highly transient loading and simultaneous long-term conditioning submerged in seawater or in environments with varying relative humidity levels. In particular, this proposal aims to investigate how various fracture modes (mode-I, mode-II and mixed-mode) initiates and propagates in pre-soaked Navy-relevant carbon fiber/vinyl ester (CFVE) composites as the level of water content in the sample is increased to saturated levels. The experimental setup has been designed throughout our previous work supported by the ONR Solid Mechanics Program and it is briefly presented below. The system was designed to generate highly repeatable edge-on impacts onto solid structures. Based on our previous work, we have shown that this setup has been successful in accomplishing these goals and therefore we will use the same methodology in this proposed work. The setup consists of a pressurized gas gun, a visualization system with a Phantom V711 high-speed camera, sample holders, and a catcher box to contain the experimental samples during and after impact.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 21, 2018
- Source ID
- N000141612764
Entities
People
- Veronica Eliasson
Organizations
- Office of Naval Research
- United States Navy
- University of Southern California