The US Naval Undersea Warfare Center, Division Newport (NUWCDIVNPT) has designed, tested, and patented applications of crimp imbalanced (CI) fibers to improve the performance of existing woven materials. The technology has demonstrated 20% improvements in the dynamic energy absorption capabilities of commercially-available products in dry woven fabrics and woven composite laminates. Both single-ply CI layers, and crimp-imbalanced gradients (CIG) consisting of multiple layers of stacked woven fabrics incorporating CI and crimp balanced (CB) fibers, demonstrate improved performance and damage tolerance by increasing the number of active fibers and extending the engagement time of those fibers in order to reduce fiber failures during dynamic loading events.
The Navy’s technology offers a simple modified woven architecture to increase the performance of existing commercially available fibers without adding weight. Increased performance in certain applications could result in reduced weight as additional layers become unnecessary. CIG architectures provide both ballistic and puncture protection, and can enhance composite resistance to fatigue failures. Dry materials applications of CI fabrics are highly desirable due to the level of comfort imparted by excellent flexibility and drapability characteristics.
- Simple: 20% improvement in the performance of existing materials can be achieved via inexpensive techniques compatible with existing weaving processes
- Comfortable: Improved performance without additional weight while maintaining or improving comfort factors such as flexibility and drapability
- Broadly Applicable: Improved dynamic energy absorption and stress-wave mitigation capabilities can improve a wide array of dry fabric and composite applications ranging from composite structures in vehicles, aircraft, boats, and wind turbines to body armor and other personal protective products
- US patent 8,555,472
- Potential for collaboration with NUWCDIVNPT researchers to pursue joint development opportunities
Articles & Downloads
- US patent 8,555,472
- Slide Deck: Improving Damage Tolerance Thresholds and Energy Absorption Capacities in Laminated Woven Composites using Crimp Imbalance and Crimp Imbalance Gradients
- Poster: Improving Damage Tolerance Thresholds and Energy Absorption Capacities in Laminated Woven Composites using Crimp Imbalance and Crimp Imbalance Gradients