3D Studies of damage by combined X-ray tomography and digital volume correlation

被引:16
作者
Marrow, James [1 ]
Reinhard, Christina [2 ]
Vertyagina, Yelena [1 ]
Saucedo-Mora, Luis [1 ]
Collins, David [1 ]
Mostafavi, Mahmoud [3 ]
机构
[1] Univ Oxford, Dept Mat, Parks Rd, Oxford, England
[2] Diamond Light Source, Harwell Sci & Innovation Campus,Fermi Ave, Harwell OXI OQX, Berks, England
[3] Univ Sheffield, Dept Engn Mech, Mappin St, Sheffield S1 3JH, S Yorkshire, England
来源
20TH EUROPEAN CONFERENCE ON FRACTURE | 2014年 / 3卷
基金
英国工程与自然科学研究理事会;
关键词
Computed Tomography; Digital Image Correlation; Damage; Deformation; INDENTATION; MICROTOMOGRAPHY;
D O I
10.1016/j.mspro.2014.06.251
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The combined use of high resolution X-ray computed tomography with digital image correlation allows quantitative observations of the three-dimensional deformations that occur within a material when it is strained. In suitable microstructures, the displacement resolution is sub-voxel (a voxel is the three-dimensional equivalent of a pixel), and both elastic and plastic deformations can be studied. This paper reviews recent work in which three-dimensional in situ observations of deformation have provided unique insights that support both continuum and heterogeneous microstructure-dependent models of damage development in a range of materials. The examples presented include; crack propagation in a quasi-brittle porous material (polygranular graphite), sub-indentation radial and lateral cracking in a brittle polycrystalline ceramic (alumina); plastic deformation and damage development underneath indentations in a ductile metal (Al-SiC composite) and a ceramic matrix composite (SiC-SiCfihre). These examples show how material properties can be obtained by analysis of the displacement fields, how such measurements can be used to better define the applied loading on small test specimens and how crack opening magnitude and mode may be extracted also. Some new directions for research are outlined, including the combined use of diffraction and imaging techniques on synchrotron X-ray facilities to map both elastic and inelastic strains. (C) 2014 Elsevier Ltd.
引用
收藏
页码:1554 / 1559
页数:6
相关论文
共 21 条