Quantifying of secondary bending effect in multi-bolt single-lap carbon-epoxy composite joints via 3D-DIC
Source abstract
Abstract
Abstract In this paper, an extensive experimental study was performed to quantify and understand secondary bending (SB) in multi-bolt single-lap joints composed of quasi-isotropic (QI) and cross-ply (CP) carbon/epoxy laminates for two laminate thicknesses. The out-of-plane displacement (OPD), which represents SB, was measured experimentally using a 3D digital image correlation (DIC) system. The SB ratio was quantified as the ratio of out-of-plane displacement (δOPD) to in-plane displacement (dt). It is found that δOPD/dt ratio measured in CP is approximately 30% higher than in QI. It has also been observed that for a given laminate configuration (CP & QI), the δOPD/dt ratio decreases as the tensile load increases. The analytical Neutral Line Model (NLM), which was used in this work, also predicts this trend. Moreover, 3D-DIC measurements show that although δOPD decreases with increasing modulus of elasticity, it increases with increasing thickness of the laminate.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mechanical Behavior of Composites · Structural Load-Bearing Analysis · Optical measurement and interference techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. Secondary bending in multi fastener, composite-to-aluminium single shear lap joints10.1016/j.compositesb.2004.09.001 ↗
2. Schijve · 1972
3. Hartman · 1969
4. Schütz · 1974
5. Shear loaded fastener installations
6. Muller · 1997
7. Three-dimensional stress analysis of bolted single-lap composite joints10.1016/S0263-8223(98)00103-2 ↗
8. Fatigue behavior of mechanical joints: a state-of-the-art overview
9. On damage development in mechanically fastened composite laminates10.1016/S0263-8223(99)00130-0 ↗
10. Effect of secondary bending on strength prediction of composite, single shear lap joints10.1016/j.compscitech.2004.10.020 ↗
11. Three-dimensional finite element analysis of single-bolt, single-lap composite bolted joints: part I—model development and validation10.1016/j.compstruct.2004.09.024 ↗
12. Fatigue of structures and secondary bending in structural elements10.1016/j.ijfatigue.2009.01.009 ↗
13. Observations and analyses of secondary bending for riveted lap joints10.1016/j.ijfatigue.2014.10.008 ↗
14. A global bolted joint model for finite element analysis of load distributions in multi-bolt composite joints10.1016/j.compositesb.2010.03.001 ↗
15. An analytical model for the secondary bending prediction in single-lap composite bolted-joints10.1016/j.compstruct.2014.01.015 ↗
16. Secondary bending effects in progressively damaged single-lap, single-bolt composite joints10.1016/j.rinp.2016.08.021 ↗
17. Effect of secondary bending and bolt load on damage and strength of composite single-lap interference-fit bolted structures10.1177/0021998319857463 ↗
18. On the combined use of Digital Image Correlation and Micro Computed Tomography to measure fibre orientation in short fibre reinforced polymers10.1016/j.compscitech.2020.108182 ↗
19. Fatigue damage evolution in thick composite laminates: combination of X-ray tomography, acoustic emission and digital image correlation10.1016/j.compscitech.2019.107815 ↗
20. Assessing 3D shear stress–strain properties of composites using Digital Image Correlation and finite element analysis based optimization10.1016/j.compscitech.2015.07.011 ↗
21. Modelling a single-bolt countersunk composite joint using implicit and explicit finite element analysis10.1016/j.commatsci.2012.02.008 ↗
22. Effect of thickness and laminate taper on the stiffness, strength and secondary bending of single-lap, single-bolt countersunk composite joints10.1016/j.compstruct.2013.07.014 ↗
23. An experimental study on the effect of bolt-hole clearance and bolt torque on single-lap, countersunk composite joints10.1016/j.compstruct.2015.03.028 ↗
24. An experimental study on the effect of joining interface condition on bearing response of single-lap, countersunk composite-aluminum bolted joints10.1016/j.compstruct.2015.08.078 ↗
25. Characterization of adhesive bonded CFRP laminates using full-field digital image stereo-correlation and finite element analysis10.1016/j.compscitech.2018.10.032 ↗
26. Tensile strength of open-hole, pin-loaded and multi-bolted single-lap joints in woven composite plates10.1016/j.matdes.2015.09.008 ↗
27. Tensile behavior of hybrid multi-bolted/bonded joints in composite laminates10.1016/j.ijadhadh.2019.102426 ↗
28. 2013
29. Digital image correlation in experimental mechanics for aerospace materials and structures10.1002/9780470686652.eae542 ↗
30. Schreier · 2009
31. Schijve · 2001
32. Skorupa · 2012
33. Bolt-hole clearance effects and strength criteria in single-bolt, single-lap, composite bolted joints10.1016/S0266-3538(02)00088-X ↗
34. An experimental study on mechanical response of single-lap bolted CFRP composite interference-fit joints10.1016/j.compstruct.2018.05.016 ↗
35. Mallick · 2007
36. Loading rate effect as a function of the span-to-depth ratio in three-point bend testing of unidirectional pultruded composites10.1016/0010-4361(91)90101-L ↗