Title: Multiscale dynamic experiments on fiber-reinforced composites with damage assessment using high-speed synchrotron X-ray phase-contrast imaging

Abstract

We report fiber-reinforced composites (FRCs) have been widely used as protection materials to replace heavier metals. However, predictive capabilities for the impact-induced failure of FRCs have not been well-developed. In this work, we introduced an integrated technique to visualize the dynamic failure of FRCs, with the modified Kolsky bar loading and the high-speed synchrotron X-ray phase-contrast imaging (PCI). We summarize our experimental studies across the FRCs’ structural levels by using this integrated technique, including single-fiber tensile experiments, fiber/matrix debonding experiments, and single-edge notched bending experiments on composite laminates. It is revealed that the high-speed synchrotron X-ray PCI technique possesses sufficient spatial resolution to identify the failure behavior of a single fiber in the 10-μm scale level, as well as temporal resolution to identify the time sequence of internal dynamic damage evolution. The technique can penetrate through the opaque composite sample and provide real-time visualization of small-scale damaging mechanisms such as the embedded fiber’s sliding in the matrix and the fiber’s transverse debonding with the matrix. At an expanding scale, the technique can identify the crack initiation and track the cracking behavior inside a single ply or between different plies of a composite laminate. High-speed visualization inside the material by thismore » integrated technique provides critical deformation and failure information to develop physical understanding of the damage inside composites under impact.« less

Authors:

Gao, Jinling ^[1]; Fezzaa, Kamel  ^[2];

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• Search DOE PAGES for ORCID "0000-0001-6135-8450"

Chen, Weinong ^[1]

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+ Show Author Affiliations

1. Purdue University, West Lafayette, IN (United States)
2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Publication Date:

Fri Mar 18 00:00:00 EDT 2022

Research Org.:

Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES); Army Research Laboratory (ARL); US Air Force Office of Scientific Research (AFOSR)

OSTI Identifier:

1894893

Alternate Identifier(s):

OSTI ID: 1867938

Grant/Contract Number:  

AC02-06CH11357; W911NF-12-2-0022; FA9550-16-1-0315

Resource Type:

Accepted Manuscript

Journal Name:

NDT & E International

Additional Journal Information:

Journal Volume: 129; Journal ID: ISSN 0963-8695

Publisher:

Elsevier

Country of Publication:

United States

Language:

English

Subject:

47 OTHER INSTRUMENTATION; dynamic failure; fiber-reinforced composites; Kolsky bar; phase-contrast imaging; synchrotron radiation