Blunt Impact Performance Characteristics of the Advanced Combat Helmet and the Paratrooper and Infantry Personnel Armor System for Ground Troops Helmet

2005 ◽  
Author(s):  
B. J. McEntire ◽  
Phillip Whitley
Keyword(s):  
Performance Characteristics ◽  
Impact Performance ◽  
Blunt Impact ◽  
Armor System

Combat helmet liner design for blunt impact absorption using multi-output Gaussian process surrogates

2020 ◽  
pp. 095440622096076 ◽  
Author(s):  
George J Barlow ◽  
Christopher Page ◽  
Patrick Drane ◽  
Scott E Stapleton ◽  
Benjamin Fasel ◽  
...  
Keyword(s):  
Gaussian Process ◽  
Impact Velocity ◽  
Linear Acceleration ◽  
Design Parameters ◽  
Test Results ◽  
Design Metrics ◽  
Impact Performance ◽  
Blunt Impact ◽  
Testing Standards ◽  
First Time

A finite element based computational model simulating the standard drop tower test for military helmets was created and used in conjunction with a multi-output Gaussian process surrogate to seek different designs of helmets for improved blunt impact performance. Experimental drop test results were used for the validation of the model’s ability to simulate impact. The influence of foam stiffness, impact velocity, strap tension, as well as pad placement and size on parameters on the peak linear acceleration (PLA) of the headform was investigated for the first time through a surrogate model trained by strategically choosing simulation points. Impact velocity was found to have the greatest effect. The strap tension and foam pad stiffness ranges examined within this sampling plan were found to have less of an effect on the performance of the helmet than the pad size and shape parameters examined. The surrogate modeling approach was used to quantify the influence of design parameters and can lead to not only improved helmet designs but also new data-driven design metrics and testing standards to accelerate the development of TBI-mitigating helmets.

Computational Modeling of Helmet Structural Dynamics During Blunt Impacts

2009 ◽  
Author(s):  
Andrzej Przekwas ◽  
X. G. Tan ◽  
Z. J. Chen ◽  
Xianlian Zhou ◽  
Debbie Reeves ◽  
...  
Keyword(s):  
Computational Model ◽  
Design Process ◽  
Structural Dynamics ◽  
Performance Testing ◽  
The United States ◽  
Impact Testing ◽  
Impact Performance ◽  
Blunt Impact ◽  
Retention System ◽  
Physical Testing

A combat helmet is a helmet designed specifically for use during combat. The Advanced Combat Helmet (ACH) was developed to be the next generation of protective combat helmets for use by the United States Army. The ACH replaces the former Personnel Armor System for Ground Troops (PASGT) helmet. The ACH has improved design features such as lighter weight, chinstrap retention system, and pad suspension system, with more comfortable fit. It is also design to allow maximum sensory and situational awareness for the operator. The design process for combat helmets can be expensive due to prototype fabrications and physical testing, which can include user-acceptance, retention evaluation, quality assurance, and ballistic and blunt impact performance testing. The physical testing required for both ballistic and blunt impact testing destroys prototype and product line helmets. In order to speed up the design process and reduce the cost associated with prototype fabrications and physical testing, we developed a multi-physics helmeted-head computational model to simulate blunt impacts to a combat helmet. The blunt impact performance of a combat helmet was evaluated using computer model by simulating the structural dynamics of the helmet during and after the impacts. This helmeted-head model is a part of a more extensive computational model to analyze the biomechanics of head injury.

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