Uniaxial Compression of Cellular Materials at a 10-1 s-1 Strain Rate Simultaneously with Synchrotron X-ray Computed Tomographic Imaging

[摘要] The topic is presented as a series of slides. Motivation for the work included the following: X-ray tomography is a fantastic technique for characterizing a material???s starting structure as well as for non-destructive, in situ experiments to investigate material response; 3D X-ray tomography is needed to fully characterize the morphology of cellular materials; and synchrotron micro-CT can capture 3D images without pausing experiment. Among the conclusions reached are these: High-rate radiographic and tomographic imaging (0.25 s 3D frame rate) using synchrotron CT can capture full 3D images of hyper-elastic materials at a 10^-2 strain rate; dynamic true in situ uniaxial loading can be accurately captured; the three stages of compression can be imaged: bending, buckling, and breaking; implementation of linear modeling is completed; meshes have been imported into LANL modeling codes--testing and validation is underway and direct comparison and validation between in situ data and modeled mechanical response is possible.

[发布日期] 2016-03-01

[学科分类] 凝聚态物理

[关键词] COMPUTERIZED TOMOGRAPHY;DYNAMIC LOADS;X-RAY RADIOGRAPHY;SYNCHROTRON RADIATION;VALIDATION;STRAIN RATE;COMPRESSION;IMAGES;BENDING;COMPUTERIZED SIMULATION;FAILURES;POROUS MATERIALS