Diamond Publications - Search Results

Search Again...

These results only include publications that have been reviewed and processed by Diamond Light Source. To also view papers that have not yet been processed click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

One item found (0 items not approved).

Instruments / Technical Area	Publication Details	Published	Actions
I13-2-Diamond Manchester Imaging	Damage evolution in braided composite tubes under torsion studied by in-situ X-ray computed tomography Yuan Chai , Ying Wang , Zeshan Yousaf , Nghia T. Vo , Tristan Lowe , Prasad Potluri , Philip J. Withers Composites Science And Technology DOI: 10.1016/j.compscitech.2019.107976 Diamond Proposal Number(s): [13704, 18197] Show Abstract ▼ Abstract: Here we present the first real-time three dimension (3D) observations of damage evolution in a composite tube under torsion. An in-situ torsion test of 1/1 45° (diamond) braided carbon fibre-epoxy circular composite tube was performed on a loading rig and the damage process was characterised by synchrotron X-ray computed tomography (CT). A number of damage modes and their damage sequence has been identified and monitored globally and in more detail within a representative region of interest. In particular, intra-tow cracks and inter-tow debonding have been found to occur almost simultaneously at low shear strains (1.5%). It is noteworthy that inter-tow debonding was initially trapped/limited within repeated braid units before propagating and connecting with other damage modes in 3D. The area fraction of inter-tow debonds was quantified at different stages and it was found to dramatically increase with increasing shear strain beyond 1.5%. The total volume fraction of the observed intra-tow cracks of various forms was seen to grow rapidly beyond shear strain of 2.0%. Beyond the peak shear stress (at shear strain of 2.5%), fibre micro-buckling and kink bands occur in the tows subjected to torsion induced axial compression at crimped regions close to tow crossovers. Tow crossovers control many aspects of damage propagation under torsion, positively by localising inter-tow debonds and negatively by initiating fibre micro-buckling.	Dec 2019

Instruments / Technical Area

Publication Details

Published

Actions

I13-2-Diamond Manchester Imaging

Damage evolution in braided composite tubes under torsion studied by in-situ X-ray computed tomography

Yuan Chai , Ying Wang , Zeshan Yousaf , Nghia T. Vo , Tristan Lowe , Prasad Potluri , Philip J. Withers

Composites Science And Technology

DOI: 10.1016/j.compscitech.2019.107976

Diamond Proposal Number(s): [13704, 18197]

Show Abstract ▼

Dec 2019