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10. Numerical Evaluation of T-stress under Mixed Mode Loading Through the Use of Coarse Meshes

Author

Pasquale Gallo, Filippo Berto, M Acanfora, Seyed Mohammad Javad Razavi, Majid R. Ayatollahi, Marine Technology, Norwegian University of Science and Technology, Iran University of Science and Technology, Department of Mechanical Engineering, Aalto-yliopisto, Aalto University, Acanfora, M., Gallo, P., Razavi, S. M. J., Ayatollahi, M. R., and Berto, F.

Subjects
Materials science, Solid-state physics, Double edge, 02 engineering and technology, Condensed Matter Physic, Stress (mechanics), 0203 mechanical engineering, General Materials Science, Polygon mesh, Mechanics of Material, T stress, mixed mode loading, ta214, Mode (statistics), T-stre, Mechanics, Surfaces and Interfaces, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Mixed mode, Finite element method, 020303 mechanical engineering & transports, Mechanics of Materials, displacement method, T-stress, Materials Science (all), coarse mesh, 0210 nano-technology
Abstract

The present paper investigates the employment of coarse meshes in evaluating the T-stress with the displacement method. Several finite element analyses have been carried out with different mesh refinements and accuracies. Mode I and mixed mode I/II loadings have been considered in finite element analyses. Under mode I loading, single and double edge notched geometries have been considered, while plate with central crack has been considerd for mixed mode loading condition. The analyses are compared with the results by the well-nown stress based approach, and showed that the displacement method permits the evaluation of the T-stress with the employment of coarse meshes. By the way, several precautions must be taken when dealing with coarse and very coarse meshes.

Published
2018
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