Novel multiscale fatigue modeling of textile composites
Abstract
The mechanisms by which fatigue damage and degradation of stiffness occur in textile polymer composites are dictated to a large extent by the cyclic response of the polymer matrix, specifically the stress-strain response of the matrix when subjected to fatigue loading, and the textile architecture, which includes details of the fiber tows an. d the textile weave and braid pattern. In this proposal, we present a novel multiscale approach to model fatigue in textile composites based on the Pis past success on developing a multi-scale modeling framework for the quasi-static damage and failure modeling of textile composites. The model to be developed is computationally efficient due to the utilization of a closed form solution for the sub-scale stress and strain states within the matrix captured via a reformulation of the composite cylinder model and referred to as the NCYL model. The NCYL model is coupled to a mesh-objective crack band model for capturing post-peak softening response in a discretization objective manner, and extended to model fatigue in textile composites. The proposed work utilizes the digital volume correlation (DVC) method for collecting experimental data on damage progression, in-situ, due to cyclic loading, by conducting experiments within an available microCT scanner, thus acquiring data at the microscale in-situ. In addition, experiments are proposed utilizing plan weave textile composites subjected to fatigue loading in order to validate the proposed multiscale modeling framework.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 07, 2018
- Source ID
- W911NF1810090
Entities
People
- Anthony Waas
Organizations
- Army Contracting Command
- United States Army
- University of Washington