3D multiscale analysis method for explosion problems based on the substructure of the explosion source

The multiscale analysis method based on traction-separation law (TSL) and cohesive zone law was used to describe the cross-scale defective process of alpha titanium (α-Ti) material with compounding microdefects in this paper. First, the properties of T-S curve and the reasonable range of T-S area relative to the length of defects were discussed. Next, based on the conclusions above, the molecule dynamics analysis of three models ofα-Ti with compounding microdefects was conducted and cross-scaly simulated. The phenomenon, principles, and mechanisms of different compound microscale defects propagation ofα-Ti were observed and explained at atomic scale, and the effects of different microdefects on macrofracture parameters of materials were studied.

Download Full-text

Development of the Meso-Macro Multiscale Analysis Method with the Use of Discrete Dislocation Mechanics

The Proceedings of The Computational Mechanics Conference ◽

10.1299/jsmecmd.2004.17.547 ◽

2004 ◽

Vol 2004.17 (0) ◽

pp. 547-548

Author(s):

Ryo ISHIKAWA ◽

Ryosuke MATSUMOTO ◽

Michihiko NAKAGAKI

Keyword(s):

Multiscale Analysis ◽

Analysis Method ◽

Discrete Dislocation ◽

Dislocation Mechanics

Download Full-text

Development of a Decoupled Multiscale Analysis Method for Woven Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.794.89 ◽

2019 ◽

Vol 794 ◽

pp. 89-96

Author(s):

Hiroma Nagaoka ◽

Tetsuya Matsuda ◽

Tsubasa Ogaki

Keyword(s):

Constitutive Model ◽

Multiscale Analysis ◽

Woven Composites ◽

Analysis Method ◽

Element Analysis ◽

Computational Costs ◽

Fiber Reinforced Plastic ◽

Reinforced Plastic ◽

The Finite Element Analysis ◽

Study Development

In this study, development of a decoupled multiscale analysis method for woven composites is conducted. To this end, an elastic-viscoplastic macroscopic constitutive model which is able to express strong anisotropy of composites is introduced, and the material parameters in the constitutive model are determined based on the results of triple-scale homogenization analysis. Moreover, the constitutive model is implemented in the finite element analysis code LS-DYNA. The developed method is applied to 3-point bending analysis of plain-woven carbon fiber-reinforced plastic (CFRP) composites with various types of laminates configurations. It is shown that the present method can analyze their different behavior depending on the laminate configuration with greatly reduced computational costs.

Download Full-text