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

Patterson, Brian M.¹ 

[1] Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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

DOI  :  10.2172/1240801
RP-ID  :  LA-UR--16-21303
PID  :  OSTI ID: 1240801
Others  :  TRN: US1600676

学科分类：凝聚态物理

美国|英语

来源: SciTech Connect

【 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.