Fatigue crack initiation and propagation in re-entrant auxetic cellular structures
Source abstract
Abstract
Abstract The investigation of the fatigue behaviour of an auxetic cellular structure made of Al-alloy 7075-T651 is presented in this study. The complete fatigue process of the analysed cellular structure is divided into the crack initiation (Ni) and crack propagation (Np) period, where the total fatigue life (Nt) is defined as the sum of Ni and Np. The crack initiation period, Ni, is determined using the strain life approach in the framework of the Fe-Safe computational code, where elastic-plastic numerical analysis is performed to obtain the total strain amplitude in the critical cross-section of the analysed cellular structure. The number of stress cycles, Np, required for the fatigue crack propagation from the initial to the critical crack length is also determined numerically using a finite element model in the framework of the Abaqus computation FEM code. The Maximum Tensile Stress (MTS) criterion is considered when analysing the crack path inside the cellular structure. Finally, experimental fatigue testing has also been performed to validate the computational results.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Cellular and Composite Structures · Automotive and Human Injury Biomechanics · High-Velocity Impact and Material Behavior
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (38)
Show source-provided references
1. Gibson · 1997
2. Fatigue damage of closed-cell aluminium alloy foam: Modelling and mechanisms10.1016/j.ijfatigue.2016.02.009 ↗
3. TMF-LCF life assessment of a lost foam casting A319 aluminum alloy10.1016/j.ijfatigue.2012.01.012 ↗
4. Manufacture, characterization and application of cellular metals and metal foams10.1016/S0079-6425(00)00002-5 ↗
5. Steel foam for structures: A review of applications, manufacturing and material properties10.1016/j.jcsr.2011.10.028 ↗
6. Composite materials with Poisson’s ratios close to –110.1016/0022-5096(92)90063-8 ↗
7. Design of planar isotropic negative Poisson’s ratio structures10.1016/j.eml.2015.05.002 ↗
8. Mechanical characterization of auxetic cellular structures built from inverted tetrapods10.1016/j.compstruct.2018.05.024 ↗
9. Auxetic behaviour from rotating semi-rigid units10.1002/pssb.200572706 ↗
10. Novel honeycombs with auxetic behaviour10.1016/j.actamat.2005.02.006 ↗
11. Auxetic cellular materials – a review10.5545/sv-jme.2016.3656 ↗
12. An isotropic three-dimensional structure with Poisson’s ratio –110.1007/BF00042531 ↗
13. Models for the elastic deformation of honeycombs10.1016/S0263-8223(96)00054-2 ↗
14. Auxetic behavior from rotating squares10.1023/A:1006781224002 ↗
15. Negative Poisson’S ratios from rotating rectangles10.12921/cmst.2004.10.02.137-145 ↗
16. Low porosity metallic periodic structures with negative Poisson’s ratio10.1002/adma.201304464 ↗
17. A novel mechanism for generating auxetic behaviour in reticulated foams: missing rib foam model10.1016/S1359-6454(00)00269-X ↗
18. Properties of a chiral honeycomb with a Poisson’s ratio of –110.1016/S0020-7403(96)00025-2 ↗
19. Foam structures with a negative Poisson’s ratio10.1126/science.235.4792.1038 ↗
20. Microstructural modelling of auxetic microporous polymers10.1007/BF00349875 ↗
21. Workings of auxetic nano-materials
22. Negative Poisson’s ratios in angle-ply laminates: theory and experiment10.1016/0010-4361(94)90027-2 ↗
23. Numerical and experimental analysis of a triangular auxetic core made of CFR-PEEK using the Directionally Reinforced Integrated Single-yarn (DIRIS) architecture10.1016/j.compscitech.2010.01.013 ↗
24. High-velocity impact experiment of aluminum foam sample using powder gun10.1016/j.measurement.2011.07.018 ↗
25. A systematic approach to identify cellular auxetic materials10.1088/0964-1726/24/2/025013 ↗
26. Non-linear properties of metallic cellular materials with a negative Poisson’s ratio10.1007/BF02403846 ↗
27. Fracture toughness of re-entrant foam materials with negative Poisson’s ratio: experiment and analysis10.1007/BF00036481 ↗
28. Fatigue of honeycombs under in-plane multiaxial loads10.1016/S0921-5093(00)01996-1 ↗
29. Mechanical behaviour of conventional and negative Poisson’s ratio thermoplastic polyurethane foams under compressive cyclic loading10.1016/j.ijfatigue.2006.07.015 ↗
30. Tensile fatigue of conventional and negative Poisson’s ratio open cell PU foams10.1016/j.ijfatigue.2008.05.005 ↗
31. Dasault Systems. SIMULIA, FE-Safe User Manual, Version 6.5.
32. Dasault Systems. SIMULIA, Abaqus Online Documentation, Version 6.14.
33. Cyclic elastoplastic performance of Aluminum 7075–T6 under strain- and stress-controlled loading10.1007/s11665-017-3047-2 ↗
34. On the mechanical behaviour of AA 7075–T6 during cyclic loading10.1016/S0142-1123(02)00149-4 ↗
35. Dowling NE. Mechanical Behaviour of Materials, 4nd ed., Pearson; 2013.
36. Melson · 2014
37. National Instruments, LabView User Manuals, Version 2016.
38. Stephens · 2001