Results 161 to 170 of about 14,989 (305)

A study of the effect of strain rate and temperature on the characteristics of quasi-unidirectional natural fibre-reinforced composites

, 2011
The responses of quasi-unidirectional vegetable fibres (sisal and flax) - styrene polyester matrix composites under 6J nominal strike energy at different sample temperatures and at higher impact energies of 9J and 12J for samples at room temperature have
R A Pethrick, O S David-West, Pethrick, R. A., David-West, O.S., W M Banks, David-West, O. S., Banks, W. M., Pethrick, R.A., Banks, W.M.   +8 more
core   +1 more source

Crash Behavior of DP800–DP1000 Advanced High‐Strength Steel’s Dissimilar Resistance Spot Welded Joints Under Quasi‐static and High Strain Rates

steel research international, EarlyView.
The high‐strain‐rate behavior of resistance spot‐welded DP800–DP1000 joints is investigated. Results show that microstructural gradients across BM–HAZ–FZ govern hardness, strain rate sensitivity, and failure modes. While strength increases with strain rate, energy absorption is controlled by ductility, with DP800–DP800 joints showing superior ...
Pankaj Shrivastava, Velaphi Msomi
wiley   +1 more source

Ballistic Fitting Impact Point Prediction Based on Improved Crayfish Optimization Algorithm

Aerospace
To solve the problem of difficulty in predicting the impact point clearly and promptly during projectile flight, this paper proposes an improved ballistic-impact-point prediction method.
Baolu Yang, Liangming Wang, Jian Fu
doaj   +1 more source

How many shots are enough? Optimizing precision measurements when testing lead‐free ammunition

Wildlife Biology, EarlyView.
Growing concern about lead exposure in scavenging wildlife and the consumers of game meat has increased interest in evaluating the performance of lead‐free rifle ammunition. Testing both accuracy and precision helps ensure reliable shot placement while reducing the risk of non‐fatal woundings.
Michael McTee, Jordan Hampton, Philip W. Ramsey   +2 more
wiley   +1 more source

Ballistic Impact Behaviour of Glass/Epoxy Composite Laminates Embedded with Shape Memory Alloy (SMA) Wires. [PDF]

Molecules, 2020
Verma L, Andrew J, Sivakumar SM, Balaganesan G, Vedantam S, Dhakal HN.   +5 more
europepmc   +1 more source

Europium‐ and dysprosium‐modified strontium aluminate: A luminescent marker system for enhanced gunshot residue detection

Journal of Forensic Sciences, EarlyView.
Abstract Forensic ballistics is essential in analyzing evidence from firearm use in criminal investigations, with gunshot residue (GSR) detection providing key information about the firearm and shooting conditions. Traditional methods like spectroscopy and scanning electron microscopy (SEM) have limitations in sensitivity, cost, and accessibility ...
Paulo Tonin, Cesar Aguzzoli, Sidnei Moura   +2 more
wiley   +1 more source

The Microstructural Difference and Its Influence on the Ballistic Impact Behavior of a Near β-Type Ti5.1Al2.5Cr0.5Fe4.5Mo1.1Sn1.8Zr2.9Zn Titanium Alloy. [PDF]

Materials (Basel), 2020
Zhu X, Fan Q, Wang D, Gong H, Yu H, Yuan J.   +5 more
europepmc   +1 more source

The Dual‐Use Conundrum of the Lisbon Treaty Regarding Space Governance: Solutions Through International Legal Interpretation?

Global Policy, EarlyView.
ABSTRACT An inherent divide features within the Lisbon Treaty between civilian and military/security competences; something previously more obvious via the ‘pillar system's’ separations. This division follows the Member States (MS) (natural) protection of their military/defence autonomy; their core sovereign powers.
Charlie J. P. Bennett
wiley   +1 more source

Complementarity in alliances: How strategic compatibility and hierarchy promote efficient cooperation in international security

American Journal of Political Science, EarlyView.
Abstract How can defense alliances reap the efficiency gains of working together when coordination and opportunism costs are high? Although specializing as part of a collective comes with economic and functional benefits, states must bargain over the distribution of those gains and ensure the costs of collective action are minimized.
J. Andrés Gannon
wiley   +1 more source

Postmortem Analysis Using Different Sensors and Technologies on Aramid Composites Samples after Ballistic Impact. [PDF]

Sensors (Basel), 2020
Rubio I, Díaz-Álvarez A, Bernier R, Rusinek A, Loya JA, Miguelez MH, Rodríguez-Millán M.   +6 more
europepmc   +1 more source