Results 41 to 50 of about 2,731 (201)

SIMULATION OF BALLISTIC IMPACT ON POLYMER MATRIX COMPOSITE PANELS

Journal of Theoretical and Applied Mechanics, 2015
Composite panels, for example fuselage skins or wing skins of military aircraft, may be subjected to a variety of ballistic impacts. It is meaningful to understand the mechanical response, damage evolution and residual velocity of a projectile for panels under ballistic impact.
openaire   +3 more sources

Simulation-Based Assessment of Rear Effect to Ballistic Helmet Impact [PDF]

Computer-Aided Design and Applications, 2010
AbstractBallistic impact is one of the major causes for traumatic brain injury (TBI) and ballistic helmets are designed to provide protection from TBI. In real life, it is impossible to use real human subjects for experiments. Therefore, simulation based-methods are convenient to assess the rear effect to ballistic helmet impact and can provide crucial
Jingzhou (James) Yang, Jichang Dai
openaire   +1 more source

Simulation and Experimental Tests of Ballistic Impact on Composite Laminate Armor [PDF]

Advances in Materials Science and Engineering, 2018
This paper presents the experimental testing and simulation results of ballistic impact tests on laminated armor samples that consist of three layers of different materials: fiber‐cement, Kevlar fabric, and steel. In experimental tests, a 9 mm FMJ bullet was launched towards a 100 cm2 sample of the armor from the fiber‐cement side.
Ali Murat Soydan, Bahadır Tunaboylu, Ahmed Galal Elsabagh, Abdul Kadir Sarı, Recep Akdeniz   +4 more
openaire   +2 more sources

Uniform Amorphization of Crystalline Silicon Surfaces Enabled by Deep Ultraviolet Femtosecond Laser Pulses

Advanced Engineering Materials, EarlyView.
Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali, Magali Gregoire, Matys Guyard, Tatiana Itina, David Grojo, Pol Sopeña   +5 more
wiley   +1 more source

Chiral Phase Change Nanomaterials

Advanced Functional Materials, EarlyView.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow, Md Shah Alam, Riad Yahiaoui, Evan M. Smith, Ryan Laing, Jules Gardener, Thomas A. Searles, Piyush J. Shah, Shivashankar Vangala, Joshua R. Hendrickson, Andrew M. Sarangan, Imad Agha   +11 more
wiley   +1 more source

Structure‐Guided Dynamical Mechanics in Bioinspired Double Twisted Laminated Thin Films

Advanced Functional Materials, EarlyView.
This work explores a dynamic mechanistic study of crack propagation and puncture testing via real‐time monitoring of crack initiation, propagation, and termination through nature‐inspired single and double twisted architectures fabricated from cellulose nanocrystals.
Justin Brackenridge, Olivia Harper, Jaejun Lee, Sergio Gonzalez‐Munoz, Vladimir V. Tsukruk   +4 more
wiley   +1 more source

Optimization of fibre-reinforced composites for lightweight ballistic body armour

Applications in Engineering Science
This study presents an innovative approach to optimizing fiber-reinforced composite materials for ballistic body armor, enhancing protection against 7.62 mm AK-47 rifle bullets.
Elias Wakshume, Semayat Fanta, Solomon Seid, Kumlachew Yeneneh   +3 more
doaj   +1 more source

Polarization Sensitivity of Chiral Manganese Halide Scintillators Enables High‐Resolution X‐Ray Imaging

Advanced Functional Materials, EarlyView.
Highly luminescent chiral manganese halide crystals are synthesized using chiral ligands, and they exhibit dissymmetry factors up to 1.4 × 10−2 and show X‐ray detection scintillation capability with a light yield of 43 380 photons/MeV and a low detection limit of 0.05198 µGyair·s−1.
Yue Han, Jun'an Lai, Peng He, Wenxia Zhang, Xirong Ke, Shengsi Liu, Kang An, Xiao‐Fang Jiang, Lakshminarayana Polavarapu, Xiaosheng Tang   +9 more
wiley   +1 more source

Mechanical Properties and Ballistic Performance for Different Coatings on HARDOX 450 Steel for Defense Applications

Crystals
The aim of the current study is to investigate the mechanical properties and ballistic performance of HARDOX 450 steel for defense applications in different conditions: uncoated, alumina-coated, and LINE X polyurea-coated.
Cosmin Nicolescu, Tudor Viorel Tiganescu, Aurora Antoniac, Ovidiu Iorga, Brandusa Ghiban, Alexandru Pascu, Alexandru Streza, Iulian Antoniac   +7 more
doaj   +1 more source

Stability of Medicinal Nanoemulsions to Spaceflight: Insights From the StarMed Experiment

Advanced Healthcare Materials, EarlyView.
Chitosan‐coated melatonin nanoemulsions (MN) recovered from a sounding rocket mission preserve droplet size and controlled‐release behavior, whereas uncoated nanoemulsions show ageing‐driven droplet growth and increased accessible drug fraction. Simple polymer coatings thus enhance the flight resilience of liquid space medicines under cumulative launch
Modupe Adebowale, Nguyen Van Duc Long, Philip M. Williams, Jens Hauslage, Volker Hessel   +4 more
wiley   +1 more source