Blast traumatic brain injury (BTBI) is the major type of injury, existing helmets are mainly designed to resist bullets and fragments, so it necessary study explosion- proof performance helmets. In this study, validated finite element models including head, Advanced Combat Helmet (ACH), fully-covered helmet based on prototype Iron Man were used establish blast wave-helmet-head fluid–solid coupling model, dynamic responses such as wave flow field pressure, skull stress, tissue displacement...

• A cranial model with human anatomy and mechanical properties was constructed. Comparative analysis of the impact type density lining materials on head protection performance. Two key indicators for evaluating brain injury, acceleration intracranial pressure characteristic parameters are analyzed. With upgrading protective equipment, penetration ability bullets into equipment is reduced, problem non-penetrating injury caused by bullet becomes prominent, but related experiment still rare....

Abstract This study proposes a process for the preparation of composite laminates using shear thickening fluid (STF) impregnated aramid fabric and presents some panel configuration strategies. Firstly, this prepared two kinds STF 20 nm 500 silica particles. Then, STF‐impregnated Kevlar fabrics were laminated hot‐pressed to form panels. After that, ballistic performance panels was evaluated by firing 9 mm steel core projectile gas gun. The tests showed that hybridized STF‐20 treated as front...

To better understand head injuries, human finite element (FE) models have been reported in the literature. In scenarios where is directly impacted and measurements of accelerations are not available, a high-quality skull model, as well brain needed to predict effect impact on through skull. Furthermore, predicting cranial bone fractures requires comprehensively validated models. Lastly, meshes for both accurate strain/stress predictions across entire head. Hence, we adopted multi-block...

A large number of brain injuries and casualties can be caused by the impact bullets on bullet-proof helmets, for which underlying mechanisms are unclear likely to complex. In current study, an American advanced combat helmet was scanned obtain 3-dimensional (3D) geometric information, from a 3D finite element (FE) model ballistic developed. With this model, FE simulation conducted results were compared with verified data test study previously reported. Furthermore, protective performance...

The mechanism of Behind Helmet Blunt Trauma (BHBT) caused by a high-speed bullet is difficult to understand. At present, there still lack corresponding parameters and test methods evaluate this damage effectively. purpose the current study therefore investigate response human skull brain tissue under loading impacting bullet-proof helmet, with effects impact direction, speed, impactor structure being considered. A finite element model which can accurately reconstruct anatomical structures...

Explosion overpressure propagates extracranially and causes craniocerebral injury after being transmitted into the brain. Studies on extent of skull to reduce impact are still lacking. Therefore, it is necessary study relationship between intracranial pressure (ICP) external field situation under blast wave. Pressure sensor ϕ 1.2 mm was disposed 3 posterior bregma rat skull, type I biological shock tube (BST-I) used as source while a side-on air installed at horizontal position ICP sensor....

AbstractFrom 1990 to approximately 50,000–120,000 people die annually of road traffic accidents in China. Traffic are the main cause death Chinese adults aged 15–45 years. This study aimed determine biomechanical response and injury tolerance human body accidents. The subject was a 35-year-old male with height 170 cm, weight 70 kg characteristics at 50th percentile. Geometry generated by computed tomography magnetic resonance imaging. A human-body model then developed. featured great detail...

Background . Vertebral column decancellation (VCD) is a new spinal osteotomy technique to correct thoracolumbar kyphotic deformity (TLKD). Relevant biomechanical research needed evaluate the safety of and fixation system. We aimed develop an accurate finite element (FE) model spine with TLKD following VCD provide reliable for further analysis. Methods A male patient who had been treated on L2 instrumented from T10 L4 was volunteer this study. The CT scanning images postoperative were used...

Lithium‐ion batteries are widely used in the automotive, military, and energy storage fields, crash safety of has attracted widespread attention. Herein, mechanical experiments first carried out on a battery module (consisting 18 650 cylindrical cells connected parallel) its components. The loading rates circular plates 1, 5, 10 mm min −1 . Based experimental data, finite‐element model is developed validated. response under static dynamic conditions then investigated through simulations. A...

Protective equipment in war plays a vital role the safety of soldiers, threat to soldiers from brain damage caused by deformation at back helmet cannot be ignored, so research on reduce blunt post-cranial injury has great significance and value. This study first conducted gunshot experiments, used rifle bullets impact bulletproof plate different density liner foam record incident process internal response craniocerebral model. After verifying accuracy finite element model through...

Unlocking the biomechanical effects of cervical spine positioning rotation manipulation in treatment patients with neck pain. In this paper, safety is analyzed by experimentally obtaining head kinematic data, importing them into a finite element model that has been developed and validated, calculating analyzing angular displacements, disc pressures, articular surface contact forces normal pathological models. The results show technique more effective adjusting position applying force to...

Head injuries in the vehicle crashes or pedestrian accidents can usually cause death permanent disabilities, and head resulting from impact of car windshields remain a major problem. Anatomically, more realistic models are required to accurately document evaluate head-to-windshield responses injuries. The current study developed finite element model carried out various simulations investigate biomechanical assess First, 50th percentile three-dimensional was validated by using previously...

Using a simulation based method, this paper analysis the damage effect of blast wave and fragments on human body protective bulletproof vest. The results show that compared with single shock wave, chest injury is more serious under combined action fragments. peak stress sternum, costal cartilage rib increases by 334.34%, 170.23% 39.72%, respectively. side lung decreases 3.95%, little change. front back 83.58% 409.09% Overall, aggravated. With addition vest, caused reduced, sternum 48.77%...