Accession Number:

AD1050750

Title:

ARO 1.2: Solid Mechanics: Augmented Finite Element Method for High-Fidelity Analysis of Structural Composites

Descriptive Note:

[Technical Report, Final Report]

Corporate Author:

University of Miami - Coral Gables

Personal Author(s):

Report Date:

2017-10-03

Pagination or Media Count:

71

Abstract:

The proposed objective of this study, according to the original propose, is to develop an efficient and accurate multiscale computational methodology for rapid virtual testing of composites with complex microstructures. The proposed research goals are1 Development of new 2D and 3D A-FEM elements that can explicitly account for statistical material heterogeneity and can faithfully predict progressive damage initiation, propagation and multi-crack interaction2 Apply the new method to study composites of interest to the Army, coupled with 3D micro-CT-based precision experiments, to understand key physical phenomena of crack formation and growth, and to quantify their direct effects on structural integrity under general loads Two more goals were added in the 4th year extension proposal in view of the importance of material nonlinearity due to finer scale micron- or sub-micron scale material damage,3 Complete the development of a multi-physics nonlinear element within the AFEM framework that will allow us to represent a microcrack in a heterogeneous medium4 Verify the ability of the multi-physics element to make correct predictions of the conditions for crack deflection, bifurcation, and branching and of the influence on these phenomena of fine-scale continuum damage in the surrounding material

Subject Categories:

  • Mechanics
  • Polymer Chemistry

Distribution Statement:

[A, Approved For Public Release]