Tensile Strengths (IMAGE) Japan Science and Technology Agency Caption Empirical contour map of nanotube tensile strengths. Each pair of integers (n,m) on a hexagon identifies the nanotube structure. Nanotube structures are roughly classified as three groups (right schematics). The left image shows the moment of nanotube fracture during the tensile test.? Credit Nagoya University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.