scholarly journals Experimental study of the correlation between the elastic modulus of polymer composite materials and the velocity of ultrasonic waves

2020 ◽  
Vol 329 ◽  
pp. 02031
Author(s):  
Dmitrii Chulkov ◽  
Alexander Terekhin ◽  
Alexander Dumansky ◽  
Maxim Tipikin
Keyword(s):  
Experimental Study ◽  
Elastic Modulus ◽  
Composite Materials ◽  
Polymer Composite ◽  
Phenol Formaldehyde ◽  
Ultrasonic Waves ◽  
Polymer Composite Materials ◽  
Significant Regression ◽  
Relationship Of ◽  
The Relationship

This article presents the results of an experimental study of the relationship of acoustic parameters (propagation velocity) of ultrasonic waves with elastic characteristics (elastic modulus) of polymer composite materials. Significant regression dependences of the correlation between the velocity of ultrasonic won and the modulus of elasticity of a composite material based on fiberglass with an epoxy and phenol-formaldehyde binder have been constructed.

On the sensitivity of large precision space structures of high-modulus fibrous polymer composite materials to microdynamical effects

2020 ◽  
Author(s):  
S.N. Sayapin
Keyword(s):  
Elastic Modulus ◽  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Space Structures ◽  
High Modulus ◽  
Abrupt Increase ◽  
Orbital Flight ◽  
Fibrous Polymer ◽  
Fibrous Polymer Composite

The paper considers the problem of sensitivity of large precision space structures made of high-modulus fibrous polymer composite materials to external and internal microdynamic effects. This problem is related to the extent of structure forming elements, as well as to an abrupt increase in the elastic modulus of the material when passing the threshold of low stresses. It is found that under low loading in the orbital flight conditions the calculated values of the elastic modulus of large precision space structures made of high-modulus fibrous polymer composite materials may be higher than the real ones by more than 20 times, which must be taken into account in the calculations. Possible ways to reduce the sensitivity of such space structures made of high-modulus fibrous polymer composite materials to external and internal microdynamic effects are shown.

FSUE "VIAM" solvent-free binders for polymer composite materials

2016 ◽  
Vol 2 (2) ◽  
pp. 37-42 ◽  
Author(s):  
E. N. Kablov ◽  
L. V. Chursova ◽  
A. N. Babin ◽  
R. R. Mukhametov ◽  
N. N. Panina
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Solvent Free ◽  
Polymer Composite Materials

Aging of polymer composite materials under loading. (See Beginning in #10-2020)

2020 ◽  
pp. 2-12
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Cyclic Loads ◽  
Reinforced Plastics ◽  
Water Exposure ◽  
Laboratory Conditions ◽  
Bending Loads ◽  
Moisture Conditions

A study review of aging polymer composite materials (PCM) under different heat-moisture conditions or water exposure with the sequential or parallel influence of static or cyclic loads in laboratory conditions is presented. The influence of tension and bending loads is compared. Conditions of the different load influence on parameters of carbon-reinforced plastics and glass-reinforced plastics are discussed. Equipment and units for climatic tests of PCM under loading are described. Simulation examples of indices of mechanical properties of PCM under the influence of environment and loads are shown.

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