Swelling-Induced Buckling Patterns in Gel Films with a Square Lattice of Holes Subjected to In-Plane Uniaxial and Biaxial Pretensions
Swelling-Induced Buckling Patterns in Gel Films with a Square Lattice of Holes Subjected to In-Plane Uniaxial and Biaxial Pretensions
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DOI：
10.1007/978-3-319-19440-0_14
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
D. Okumura;A. Sasaki;N. Ohno
中科院分区：
文献类型：
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作者：
D. Okumura;A. Sasaki;N. Ohno
在这项研究中，我们研究了含有正方形孔洞晶格的凝胶膜中的膨胀诱导屈曲模式。与实验一致，我们模拟了聚二甲基硅氧烷(PDMS)薄膜被预应变，然后用甲苯溶胀。薄膜在膨胀前受到单轴和双轴拉伸，以研究该系统产生复杂屈曲图案的潜在能力。使用聚合物凝胶的非均匀场论进行了有限元分析。由此产生的模式被发现是高度多样化的，并敏感地取决于伪装的类型和大小。这些图案要么转变为钻石板状图案(DPP)，要么不发生图案转变。模式转换图包含DPP、过渡模式和单调模式三个区域。伪装既扭曲了正方形空穴晶格的初始排列，又推迟了向DPP转变的开始。
In this study, we investigate swelling-induced buckling patterns in gel films containing a square lattice of holes subjected to in-plane pretensions. In accord with experiments, we simulate poly(dimethylsiloxane) (PDMS) films being prestrained and then swelled using toluene. Films are subjected to uniaxial and bi-axial pretensions before swelling to investigate the potential ability of this system to generate complex buckling patterns. Finite element analysis is performed using an inhomogeneous field theory for polymeric gels. The resulting patterns are found to be highly diverse and depend sensitively on the type and magnitude of pretensions. The patterns arise from either transformation into diamond plate patterns (DPPs) or no pattern transformation. Diagrams of pattern transformation contain three regions of DPPs, transitional patterns, and monotonous patterns. Pretensions both distort the initial arrangement of the square lattice of holes and delay the onset of transformation into DPPs.