Results 81 to 90 of about 1,873,474 (208)

Process for improving mechanical properties of epoxy resins by addition of cobalt ions [PDF]

open access: yes, 1984
A resin product useful as an adhesive, composite or casting resin is described as well as the process used in its preparation to improve its flexural strength mechanical property characteristics.
St.clair, A. K., Stoakley, D. M.
core   +1 more source

Compressive load bearing and bone architecture of lumbar vertebrae in terms of sex and aging [PDF]

open access: yes, 2004
Relation between vertebral compressive strength and trabecular architecture is presented in terms of aging and sex. Complex in vitro medical-engineering analysis of cadaver human lumbar L1 and L2 vertebrae was executed: densitometry, CT, MRI, mechanical ...
Fornet, B.   +2 more
core  

Self-controlled wave propagation in hyperelastic media

open access: yesScientific Reports, 2017
We demonstrate theoretically that an ultrasonic wave propagating in a hyperelastic medium can self-control its phase velocities. This phenomenon occurs because the propagation of the ultrasonic wave generates acoustic radiation stresses in the medium ...
Fengxian Xin, Tian Jian Lu
doaj   +1 more source

Crogenic alloy screening Interim report [PDF]

open access: yes
Evaluation of mechanical properties and fracture strength of aluminum alloys and stainless ...
Keys, R. D.   +2 more
core   +1 more source

Nonlinear Dynamics of the High-Speed Rotating Plate

open access: yesInternational Journal of Aerospace Engineering, 2018
High speed rotating blades are crucial components of modern large aircraft engines. The rotating blades under working condition frequently suffer from the aerodynamic, elastic and inertia loads, which may lead to large amplitude nonlinear oscillations ...
Minghui Yao, Li Ma, Wei Zhang
doaj   +1 more source

Structure-to-property Relationships in Addition Cured Polymers 2: Resin Tg Composite Initial Mechanical Properties of Norbornenyl Cured Polyimide Resins [PDF]

open access: yes
PRM (polymerization of monomeric reactants) methodology was used to prepare thirty different polyimide oligomeric resins. Monomeric composition as well as chain length between sites of crosslinks were varied to examine their effects on glass transition ...
Alston, W. B.
core   +1 more source

Initial Parameter Analysis about Resonant Orbits in Earth-Moon System

open access: yesAdvances in Astronomy, 2019
The initial parameters about resonant orbits in the Earth-Moon system were investigated in this study. Resonant orbits with different ratios are obtained in the two-body problem and planar circular restricted three-body problem (i.e., PCRTBP).
Li-Bo Liu   +2 more
doaj   +1 more source

Dynamical electron transport through a nanoelectromechanical wire in a magnetic field

open access: yes, 2009
We investigate dynamical transport properties of interacting electrons moving in a vibrating nanoelectromechanical wire in a magnetic field. We have built an exactly solvable model in which electric current and mechanical oscillation are treated fully ...
B.J. LeRoy   +24 more
core   +2 more sources

Transparent polymeric laminates [PDF]

open access: yes, 1973
Laminate prepared from epoxy-boroxine and phenolphthalein polycarbonate has high mechanical strength at elevated temperature and is resistant to impact, fire, and high-energy thermal radiation.
Fohlen, G. M.   +2 more
core   +1 more source

Predefined-Time Tracking Control of Servo Hydraulic Cylinder Based on Reinforcement Learning

open access: yesActuators
Electro-hydraulic servo systems are characterized by significant nonlinearities. Reinforcement learning (RL), known for its model-free nature and adaptive learning capabilities, presents a promising approach for handling uncertainties inherent in such ...
Tao Han   +5 more
doaj   +1 more source

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