A213 Computational mechanics approach to osteoporosis diagnosis by means of multi-scale stress analysis of trabecular bone

Kawagai, Mitsuhiro; Takano, Naoki; Adachi, Taiji; Nakano, Takayoshi; Umakoshi, Yukichi; Sando, Atsushi; Kushida, Noriyuki; Enokimoto, Takatoshi

doi:10.1299/jsmebiofro.2005.16.113

Cited by 1 publication

(4 citation statements)

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“…the rotation of the local model, is influential for the local stress distribution. To determine the setting of the local model or in other words to determine the coordinate system setting for global and local models, a morphology analysis should be carried out a priori [23,24]. In this section, we could confirm that the flexible modelling of microstructure within the framework of multi-scale analysis is available using the proposed modelling technique.…”

Section: Multi-scale Stress Analysis and Evaluationmentioning

confidence: 77%

“…The proposed numerical technique is widely applicable to multi-scale problems. As one of the applications, we are solving the microscopic stress of a trabecular bone considering a nanoscale biological apatite grain and a specially designed modelling tool with GUI, the binarization of CT images and morphology analysis modules [23].…”

Section: Discussionmentioning

confidence: 99%

“…In the real material design process, more local models should be examined from the statistical point of view. A morphology analysis technique [23,24] is needed in the future to efficiently select the local model. It is necessary to employ the proposed modelling technique because there are several pores on the boundary faces of the local mesh.…”

Section: Modelling With Proposed Techniquementioning

confidence: 99%

“…On the contrary, for real materials with random microstructures, an automatic meshing by means of the digital image-based modelling strategy with voxel meshing is essential and very effective. It has been so far applied to concretes, porous ceramics and trabecular bones [22,23]. Especially for porous materials, x-ray CT can capture the microscopic pores nondestructively.…”

Section: Introductionmentioning

confidence: 99%

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Image-based multi-scale modelling strategy for complex and heterogeneous porous microstructures by mesh superposition method

Kawagai¹,

Sando²,

Takano³

2006

Modelling Simul. Mater. Sci. Eng.

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This study is focused on the multi-scale modelling strategy for complex and heterogeneous microstructures of real materials by automatic image-based modelling and finite element mesh superposition method. The synergetic application of the conventional asymptotic homogenization method and the authors' mesh superposition method has been proposed to obtain the microscopic responses under high gradient of macroscopic fields at the macroscopic crack tip and/or interface, for instance. For complex and random microstructures, automatic image-based voxel meshing by means of x-ray CT is commonly required; however, it cannot always adapt to the mathematical theory of microscopic modelling in the mesh superposition method. Therefore, a modelling technique for mesh refinement is proposed in this paper using additional elements for insulation in consideration of the theoretical background of the mesh superposition method.In this paper, we provide the modelling procedure and its theoretical consideration of mesh refinement for flexible modelling of real materials. To demonstrate the technique, a numerical example of a porous ceramic component with random microstructure and macroscopic crack is illustrated.

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Section: Multi-scale Stress Analysis and Evaluationmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Section: Modelling With Proposed Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations