Crash optimization considering the head injury criterion

Abstract

In the crashworthiness of the vehicle, the head injury criterion is the most significant factor in the injury rate. Crash optimization has been employed to enhance the head injury criterion value. Since the head injury criterion value is calculated from acceleration, a surrogate-model-based crash optimization method is generally used. However, when the number of design variables increases, the cost of analysis increases extremely. Conceptual design such as topology optimization is difficult to apply since it has many design variables. A crash optimization methodology that considers the head injury criterion value is proposed based on the equivalent static loads method. The proposed method calculates the head injury criterion value using the finite difference method, and the channel frequency classes filter during linear static-response structural optimization with the equivalent static loads. Two practical large-scale problems are solved to validate the proposed method. For the headform impact on the upper interior, size optimization is carried out to satisfy the constraint on the head injury criterion value while the mass is minimized. Topology optimization is performed in the case of the hood headform impact. The material distribution of the inner panel in the hood is determined to minimize the head injury criterion value.

Research on Impact Attenuation Characteristics of Greyhound Racing Track Padding for Injury Prevention

“…There is no known published research on the relationship of the severity of impacts on canines and the measured HIC and underlying accelerations. There is, however, considerable such research on the severity of impacts for humans [27,28]. The graph of probability of Maximum Abbreviated Injury Scale (MAIS) [29] for an average adult human male, shown in Figure 9, describes the probability of different levels of injury occurring for a certain HIC value.…”

Current state and progress of research on forensic biomechanics in China

“…Stressstrain curves of biological tissues are generally nonlinear, anisotro pic, and viscoelastic, and nonNewtonian fluid models may better represent body fluids [13]. The material properties of human tissues have been extensively tested and applied to biomechanical modelling and case studies [13][14][15][16][17][18][19][20], and various injury criteria have been developed, such as the head injury criterion, cumulative strain damage measure, brain injury cri terion, and maximum principal strain for the head [21][22][23][24] and thoracic trauma index, combined thoracic index [25], and viscous criterion [26,27] for the tho rax, providing fundamental data for biomechanical modelling and injury analysis.…”

Impact Device for Biomechanics of Human Head-Neck Injuries

“…Many authors proposed that the neck's length variation should be considered better to estimate neck injuries [19][20][21]. HIC (Head Injury Criteria) is used to estimate cranioencephalic injuries caused by impacts in sports events [22][23][24]. is index evaluates just the acceleration suffered by the head on a small period using the formula HIC � max 1…”