The coupled strength and toughness of interconnected and interpenetrating multi-material gyroids
Abstract
The growth of additive manufacturing technologies has spurred interest in examining multi-material micro-architected materials for filling the so-called white spaces in the Ashby strength versus toughness plots. We investigate this problem using interconnected and interpenetrating double gyroids comprising ductile and brittle phases as an exemplar. Both strength and toughness at the initiation of crack growth are shown to vary non-monotonically with the volume fraction of the two phases and multi-material double gyroids significantly outperform their single material counterparts. However, we establish that at a given relative density, the strength and toughness cannot be simultaneously enhanced for architecture designs, which include varying gyroid orientations, phase volume fractions, and the unit cell length scales of the two phases. Intriguingly, even crack flank bridging by the ductile phase during crack growth is insufficient to overcome this inherent property of the interpenetrating gyroids. Our conclusion is that multi-material interpenetrating micro-architected solids are unlikely to outperform single material non-interpenetrating lattices from a strength–toughness perspective but rather become optimal when multi-functionality is required.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 11, 2022
- Source ID
- 10.1557/s43577-021-00249-3
Entities
People
- Angkur Jyoti Dipanka Shaikeea
- Huachen Cui
- Padmeya P. Indurkar
- Vikram Deshpande
- Xiaoyu Zheng
- Zhenpeng Xu
Organizations
- Air Force Office of Scientific Research
- Office of Naval Research Global