The Effect of Void Arrangement on the Pattern Transformation of Porous Soft Solids under Biaxial Loading

Structural topology and loading condition have important influences on the mechanical behaviors of porous soft solids. The porous solids are usually set to be under uniaxial tension or compression. Only a few studies have considered the biaxial loads, especially the combined loads of tension and com...

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Published inMaterials Vol. 14; no. 5; p. 1205
Main Authors Qiu, Hai, Li, Ying, Guo, Tianfu, Tang, Shan, Xie, Zhaoqian, Guo, Xu
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 04.03.2021
MDPI
Subjects
Axial stress
biaxial loading
Biaxial loads
Design
Energy
Experiments
pattern transformation
Polyesters
Polymethyl methacrylate
Porous materials
porous soft solids
Rubber
Silicones
Solids
Tensile deformation
Topology
Transformations
void morphology
Voids
pattern transformation
porous soft solids
biaxial loading
void morphology
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Summary:Structural topology and loading condition have important influences on the mechanical behaviors of porous soft solids. The porous solids are usually set to be under uniaxial tension or compression. Only a few studies have considered the biaxial loads, especially the combined loads of tension and compression. In this study, porous soft solids with oblique and square lattices of circular voids under biaxial loadings were studied through integrated experiments and numerical simulations. For the soft solids with oblique lattices of circular voids, we found a new pattern transformation under biaxial compression, which has alternating elliptic voids with an inclined angle. This kind of pattern transformation is rarely reported under uniaxial compression. Introducing tensile deformation in one direction can hamper this kind of pattern transformation under biaxial loading. For the soft solids with square lattices of voids, the number of voids cannot change their deformation behaviors qualitatively, but quantitatively. In general, our present results demonstrate that void morphology and biaxial loading can be harnessed to tune the pattern transformations of porous soft solids under large deformation. This discovery offers a new avenue for designing the void morphology of soft solids for controlling their deformation patterns under a specific biaxial stress-state.
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These authors contributed equally to this work.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14051205