Abstract The derivation by variational asymptotic homogenization of a 2D-continuum model describing large elastic planar deformations of a discrete bi-pantographic structure is presented. A rectangular bi-pantographic specimen was additively manufactured and subjected to a bias extension test for macroscopic strains up to ca. 40%. The deformations of the bi-pantographic sample were measured via FE-based digital image correlation. Measured boundary conditions then drove the numerical model of the experiment. The gray level residuals were utilized to independently probe the kinematic hypotheses of DIC and FE simulations against the full video of the experiment for validation purposes.

中文翻译：

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通过数字图像相关验证双缩放超材料的均质化建模

摘要 提出了描述离散双受电弓结构的大弹性平面变形的二维连续模型的变分渐近均匀化的推导。一个矩形双缩放样本是增材制造的，并进行了宏观应变的偏置延伸测试，最高可达约 40%。双缩放样本的变形通过基于有限元的数字图像相关性进行测量。然后测量的边界条件驱动实验的数值模型。灰度级残差用于针对实验的完整视频独立探测 DIC 和 FE 模拟的运动学假设，以进行验证。