scholarly journals Experimental investigation of the strain‐rate effects on the failure of composite materials with off‐axis tensile tests on unidirectional plies

Strain ◽  
2021 ◽  
Author(s):  
Thomas Fourest ◽  
Julien Berthe
Keyword(s):  
Experimental Investigation ◽  
Composite Materials ◽  
Strain Rate ◽  
Tensile Tests ◽  
Strain Rate Effects ◽  
Rate Effects

Aspects of Strain Rate Effects on Some Composite Materials

2000 ◽  
Author(s):  
Emmanuel O. Ayorinde
Keyword(s):  
Acoustic Emission ◽  
Composite Materials ◽  
Strain Rate ◽  
Matrix Cracking ◽  
Epoxy Composites ◽  
Fiber Architecture ◽  
Strain Rate Effects ◽  
Rate Effects ◽  
General Strain ◽  
Ultrasonic Images

Abstract Effects of moderate straining speed on the material and damage characteristics of beam samples of graphite/epoxy and E-glass/epoxy composites were investigated. The basic fiber architecture utilized was unidirectional, axial layup, but data was also obtained for the 45-degree orientation. Ultrasonic and acoustic emission (AE) inspections were utilized. The acoustic emission records show matrix cracking. The ultrasonic images revealed the regions of failure. The results show that in general, strain rate notably affects material and damage properties.

Strain Rate Effects on Tensile Properties of Fiber Reinforced Concrete

1985 ◽  
Vol 64 ◽  
Author(s):  
George G. Nammur ◽  
Antoine E. Naaman
Keyword(s):  
Reinforced Concrete ◽  
Strain Rate ◽  
Volume Fraction ◽  
Tensile Tests ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Strain Rate Effects ◽  
Rate Effects ◽  
The Matrix

ABSTRACTHigh strain rates lead to substantial modifications in the stress-strain (or stress-displacement) response of fiber reinforced concrete in tension. These modifications include higher strength and corresponding strain, as well as smaller displacement at failure.The purpose of this paper is to investigate the behavior of fiber reinforced concrete under impact tensile loading, and to study the effect of strain rate on the post-cracking strength of the composite. The variation of the tensile strength of the matrix with the reinforcement parameters such as volume fraction Vf and aspect ratio |/φ of the fibers is also studied ip this paper. A special emphasis is placed on the stress-displacement relationship of steel fiber reinforced concrete in its post-cracking range. An empirical model of the stress- displacement relationship as a function of the strain rate is developed from experimental data from tensile tests on dogbone shape notched tensile prisms. The model highlights the effects of strain rate and fiber properties on the post-cracking strength of the composite, as well as the displacement at failure. The effect of strain rate on the post-cracking toughness of fiber reinforced concrete is also addressed. The literature on impact effects on concrete in tension (plain and fiber reinforced) is briefly reviewed in this paper, and so is the state of the art of testing techniques for strain rate effects.

Strain Rate Effects in Composites

1997 ◽  
Vol 50 (12) ◽  
pp. 741-761 ◽  
Author(s):  
R. L. Sierakowski
Keyword(s):  
Composite Materials ◽  
Strain Rate ◽  
High Strain ◽  
Dynamic Performance ◽  
Review Article ◽  
Strain Rate Effects ◽  
Information Base ◽  
Rate Effects ◽  
Rate Behavior ◽  
Strain Rate Behavior

A review of the high strain rate behavior of filamentary composite materials is presented. The experimental techniques used for evaluating the dynamic performance of composites are discussed, as well as results obtained by researchers for various types of filamentary composites. Areas of research needed for expanding the information base for composites as well as the testing devices needed to obtain composite test data are chronicled. This review article contains 120 references.

Strain rate effects on the mechanical properties of polymer composite materials

2004 ◽  
Vol 94 (1) ◽  
pp. 296-301 ◽  
Author(s):  
George C. Jacob ◽  
J. Michael Starbuck ◽  
John F. Fellers ◽  
Srdan Simunovic ◽  
Raymond G. Boeman
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Strain Rate ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Strain Rate Effects ◽  
Rate Effects

Numerical simulation of welding stresses and distortions under consideration of temporal and local changes of strain rate

2004 ◽  
Vol 120 ◽  
pp. 169-175
Author(s):  
R. Ossenbrink ◽  
H. Wohlfahrt ◽  
V. Michailov
Keyword(s):  
Numerical Simulation ◽  
Strain Rate ◽  
High Strain ◽  
Local Strain ◽  
Tensile Tests ◽  
Strain Rates ◽  
Current Yield ◽  
Strain Rate Effects ◽  
Rate Effects ◽  
High Influence

As a result of high temperature changing rates in the heat affected zone (HAZ) the elevated strain rates during welding may have a high influence of the yield stresses. Higher yield stresses as a result of high strain rates can be observed in hot tensile tests for several materials. A model has been developed and integrated in a multi-purpose FEA-program (ANSYS®) to investigate strain rate effects in numerical welding simulation. The routine calculates the current yield stress as a function of the local strain rates. The influence of the resulting stresses and distortions has been analyzed in comparative numerical welding simulations.

High Strain Rate Effects for Composite Materials

2009 ◽  
pp. 162-162-15 ◽  
Author(s):  
SE Groves ◽  
RJ Sanchez ◽  
RE Lyon ◽  
AE Brown
Keyword(s):  
Composite Materials ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Strain Rate Effects ◽  
Rate Effects
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