Objective   To explore the blast wave field around thoracic region loaded by blast wave and the stress distribution rules in the lung through finite element (FE) model in order to provide help to blast injury mechanism and injury evaluation.    Methods   CT scanning (scanning layer 0.625 mm

Format Dicom

512×512×8 bit) was performed on a health male individual (170 cm

65 kg). A 3D surface model of thoracic region was completely reconstructed by Mimics

and grid division was fulfilled by Icem CFD. Implement blast wave load and discrimination was carried out with Ls-Dyna.    Results   Thoracic region 3D FE model was constructed. This model included muscles

scapula

costa sternales bones

heart and lung. Element types were 4 node point tetrahedron

number of element was 129 543

and node point was 32 267. When the shock wave was loaded with a pressure of 100 kPa

the pressure on both side of thoracic region were same

about 55 to 80 kPa

anterior surface pressure was the highest with 175 kPa

posterior surface diffraction pressure was 70 kPa

and the highest stress part in lung was marginal part.    Conclusion   A thoracic region 3D FE model is constructed successfully which satisfies require of blast wave loading

and can be used for numerical simulation of blast wave load process and result in thoracic region.