Acceleration response test and damage analysis of dummy head under explosion shock wave

LUO Zongmu; LI Ke; CHEN Hao; ZHANG Yuwu; LIANG Minzu; LIN Yuliang

doi:10.11883/bzycj-2024-0242

Volume 44 Issue 12

Dec. 2024

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Article Navigation > Explosion And Shock Waves > 2024 > 44(12): 121435

LUO Zongmu, LI Ke, CHEN Hao, ZHANG Yuwu, LIANG Minzu, LIN Yuliang. Acceleration response test and damage analysis of dummy head under explosion shock wave[J]. Explosion And Shock Waves, 2024, 44(12): 121435. doi: 10.11883/bzycj-2024-0242

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LUO Zongmu, LI Ke, CHEN Hao, ZHANG Yuwu, LIANG Minzu, LIN Yuliang. Acceleration response test and damage analysis of dummy head under explosion shock wave[J]. Explosion And Shock Waves, 2024, 44(12): 121435. doi: 10.11883/bzycj-2024-0242

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Acceleration response test and damage analysis of dummy head under explosion shock wave

doi: 10.11883/bzycj-2024-0242

College of Science, National University of Defense Technology, Changsha 410073, Hunan, China

Received Date: 2024-07-17
Rev Recd Date: 2024-10-08

Available Online: 2024-11-04

Publish Date: 2024-12-01

Abstract

Abstract

In military operations, terrorist attacks, accidents and other situations, blast injury has become the main mode of casualties, among which the proportion of blast-induced traumatic brain injury (bTBI) has increased significantly, but the specific injury mechanism is still unclear. In order to obtain the acceleration response of human head under the action of explosion shock wave, establish the internal relationship between acceleration and explosion shock wave overpressure, and evaluate the head injury evaluation criteria based on acceleration parameters, this study carried out the air static explosion test of various TNT equivalent spherical charges by using the dummy model with standard body level, on which the acceleration time history curves and the free field overpressure curves of the model head at different scaled distances were obtained. Based on peak linear acceleration, head injury criterion (HIC) and head impact power (HIP), the risk level of head injury was quantitatively analyzed, and the applicability and effectiveness of the three injury assessment indexes were evaluated in the explosion scene. The results show that the acceleration of the dummy head at 4.2 m from the detonation center increases rapidly with the increase of TNT equivalent. In the range from 1 to 4 kg TNT mass, the peak acceleration in the direction of detonation increases from 16.29g to 70.11g. The peak acceleration in each direction is linearly correlated with the peak overpressure. Under the experimental conditions, the maximum risk of mild traumatic brain injury (mTBI) predicted by the three evaluation indexes was 25%, 10%, and 5%, where HIP index evaluated the lower risk of mTBI. When the three evaluation indexes reached the threshold of severe head injury, the corresponding peak overpressure was 0.322, 0.300 and 0.332 MPa, respectively. The peak overpressure corresponding to the HIC index was the lowest, indicating that it had the strongest sensitivity to predict severe head injury.
- explosion shock wave,
- acceleration response,
- head injury criterion,
- injury assessment

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References

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