Results 1 to 10 of about 74,879 (137)

Influence of surface polyurea coating on the ballistic performance of kevlar fabric [PDF]

Heliyon
With the increasing lethality of modern weapons, the development of body armor has become increasingly important. The main objective of current research is to make protective gear lighter and increase material ballistic performance.
Xing Li, Mengqi Yuan, Chunyang Huang, Shaowu Wang   +3 more
doaj   +2 more sources

A comparison of three post-activation potentiation enhancement warm up strategies on bench press performance [PDF]

Frontiers in Sports and Active Living
BackgroundAt loads greater than 80% of one repetition maximum in bench press, at the ascending phase of the movement, the barbell decelerates or stops for a short time before it accelerates again during a region named sticking region.
Yousef Hedayati, Roland van den Tillaar
doaj   +2 more sources

Research on Grain Burnback and Internal Ballistic Performance of Solid Rocket Motor under High Overload Conditions Based on Minimum Distance Function [PDF]

Hangkong bingqi, 2022
The accurate calculation of the burning surface during the grain burnback is the basis for the ballistic performance calculation of solid rocket motor. The overload conditions of the motor can significantly affect the burning surface area, grain burnback
Lin Lin, Shang Yongteng, Li Chongchong, Bai Tao, Guo Mengfei
doaj   +1 more source

Effects of the adhesive layer on the multi-hit ballistic performance of ceramic/metal composite armors

Journal of Materials Research and Technology, 2021
The effects of adhesive layer on the multi-hit ballistic performance of ceramic/metal composite armors are studied by the experimental and numerical methods.
Yonghua Shen, Yangwei Wang, Shaofeng Du, Zhikun Yang, Huanwu Cheng, Fuchi Wang   +5 more
doaj   +1 more source

The Ballistic Performance of Laminated SiC Ceramics for Body Armor and the Effect of Layer Structure on It

Applied Sciences, 2021
Laminated ceramics with weak interface layers have been proven to be effective in toughening ceramics. The energy absorption ability of laminated ceramics may also benefit their ballistic performance.
Yuzhe Hong, Fangmin Xie, Lijun Xiong, Mingliang Yu, Xiangqian Cheng, Mingjie Qi, Zhiwei Shen, Guoping Wu, Tian Ma, Nan Jiang   +9 more
doaj   +1 more source

Using an Internal State Variable Model Framework to Investigate the Influence of Microstructure and Mechanical Properties on Ballistic Performance of Steel Alloys

Metals, 2023
An internal state variable (ISV)-based constitutive model has been used within a Lagrangian finite element analysis (FEA) framework to simulate ballistic impact of monolithic rolled homogenous armor (RHA) steel plates by RHA steel spheres and cylinders ...
Luke Peterson, Mark Horstemeyer, Thomas Lacy, Robert Moser   +3 more
doaj   +1 more source

Ballistic performance of a lightweight nacre-inspired armour panel – a numerical study

Composites Part C: Open Access, 2022
This paper provides a numerical investigation on the ballistic performance of ceramic composite armour panels with porous architectures inspired by nacre from mollusc shells.
Abdallah Ghazlan, Tuan Ngo, Ping Tan, Phuong Tran, Keivan Nazari, Yi Min Xie   +5 more
doaj   +1 more source

Ballistic Behavior of Bioinspired Nacre-like Composites

Biomimetics, 2023
In this paper, the ballistic performance of a multilayered composite inspired by the structural characteristics of nacre is numerically investigated using finite element (FE) simulations.
Danny G. Chan-Colli, Eliana M. Agaliotis, David Frias-Bastar, Luming Shen, Jose G. Carrillo, Pedro J. Herrera-Franco, Emmanuel A. Flores-Johnson   +6 more
doaj   +1 more source

Polyimide aerogels for ballistic impact protection

Scientific Reports, 2022
The ballistic performance of edge-clamped monolithic polyimide aerogel blocks (12 mm thickness) has been studied through a series of impact tests using a helium-filled gas gun connected to a vacuum chamber and a spherical steel projectile (approximately ...
Sadeq Malakooti, Stephanie L. Vivod, Michael Pereira, Charles R. Ruggeri, Duane M. Revilock, Runyu Zhang, Haiquan Guo, Daniel A. Scheiman, Linda S. McCorkle, Hongbing Lu   +9 more
doaj   +1 more source

Comparison of Ballistic-Coefficient-Based Estimation Algorithms for Precise Tracking of a Re-Entry Vehicle and its Impact Point Prediction [PDF]

Journal of Astronomy and Space Sciences, 2012
This paper studies the problem of tracking a re-entry vehicle (RV) in order to predict its impact point on the ground. Re-entry target dynamics combined with super-high speed has a complex non-linearity due to ballistic coefficient variations.
Kyung Rok Moon, Tae Han Kim, Taek Lyul Song   +2 more
doaj   +1 more source