4.7 Article

Experimental and numerical investigation of tool-part interaction on the process-induced distortions in composite structures

期刊

COMPOSITE STRUCTURES
卷 279, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2021.114871

关键词

Cure behaviour; Residual; internal stress; Finite element analysis; Analytical modelling

资金

  1. National Natural Science Foundation of China [11902231]
  2. Fundamental Research Funds for the Central Universities [WUT:203101002]

向作者/读者索取更多资源

Experimental tool-part interaction was conducted with FBG sensors adhesively bonded to the thin tool, quantifying interfacial properties parameters theoretically. The results showed that sliding friction dominates after a critical value of interfacial shear stress is reached at a certain time in the cool-down stage.
The tool-part interaction was experimentally carried out using FBG sensors adhesively bonded to the thin tool in a tool-part assembly, and corresponding interfacial properties parameters were theoretically quantified according to the acquired data and shear-lag theory. Subsequently, these derived parameters were adjusted and fed into FE model of C-shaped composite structure cured on the aluminium tool to numerically predict its spring-in, in company with experimental validation. Meanwhile, two comparative simulations neglecting tangential friction and tool expansion were provided to clarify the significance of tool-part interaction. The results from the assembly show that the sticking condition mainly exists until interfacial shear stress reaches a critical value at a certain time in the cool-down stage, after which the sliding friction dominates. The good agreement of spring-in between experiment and simulation provides a favourable support for the numerical simulation scheme, and comparative simulations reveal that tangential friction contributes to spring-in but the tool expansion alleviates it.

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