Identification of Rubber-like Behaviour from Non Homogeneous Multiaxial Testing

2011 ◽  
Author(s):  
Mourad Idjeri ◽  
Luc Chevalier ◽  
Hocine Bechir
Keyword(s):  
Multiaxial Testing

Anisotropic damage behavior of SiC/SiC composite tubes: Multiaxial testing and damage characterization

2015 ◽  
Vol 76 ◽  
pp. 281-288 ◽  
Author(s):  
Fabien Bernachy-Barbe ◽  
Lionel Gélébart ◽  
Michel Bornert ◽  
Jérôme Crépin ◽  
Cédric Sauder
Keyword(s):  
Anisotropic Damage ◽  
Composite Tubes ◽  
Damage Behavior ◽  
Multiaxial Testing ◽  
Damage Characterization

Inadequacies in Uniaxial Stress Screen Vibration Testing

2001 ◽  
Vol 44 (4) ◽  
pp. 20-23 ◽  
Author(s):  
Wayne Whiteman ◽  
Morris Berman
Keyword(s):  
Fatigue Failure ◽  
Uniaxial Stress ◽  
Test Methods ◽  
Operating Conditions ◽  
Triaxial Tests ◽  
Vibration Testing ◽  
Uniaxial Test ◽  
Multiaxial Testing ◽  
The Difference ◽  
Vibration Tests

Validating the design and reliability of equipment prior to fielding is a critical step in the materiel development and manufacturing process. Success requires that the new equipment undergo and survive testing. Stress screen vibration testing determines the equipment's design capability. Traditionally, stress screen vibration tests have been conducted by sequentially applying uniaxial excitation to test articles along three orthogonal axes. Simultaneous multiaxial excitation is an advanced method of vibration testing with the goal of more closely approximating real-world operating conditions. Multiaxial testing achieves the synergistic effect of exciting all modes simultaneously and induces a more realistic vibrational stress loading condition. This research begins an effort to explore the difference in predicting fatigue failure between sequentially applied uniaxial and simultaneous triaxial tests. The research plan starts with simple cantilever beam structures. Once initial results are complete, more complex and typical components in actual vehicles will be tested. This paper provides results that reveal inadequacies in traditional uniaxial test methods. It is shown that the order in which orthogonal uniaxial excitation is applied has a significant effect on fatigue failure.

scholarly journals Quasi-static multiaxial testing of PBX 9501: Creep effects on Estane molecular weight

1999 ◽  
Author(s):  
P.D. Peterson ◽  
D.J. Idar ◽  
R. Rabie ◽  
C.S. Fugard ◽  
W. King ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Multiaxial Testing

Design of NRL66.4: An Electro-Hydraulic 6-DoF Parallel Robotic Multiaxial Material Testing System

2019 ◽  
Author(s):  
John G. Michopoulos ◽  
Athanasios P. Iliopoulos ◽  
John C. Steuben ◽  
Benjamin D. Graber
Keyword(s):  
Degrees Of Freedom ◽  
Material Testing ◽  
Multiaxial Fatigue ◽  
Current Status ◽  
Testing System ◽  
Damage Propagation ◽  
Propagation Modeling ◽  
Multiaxial Testing ◽  
Reaction Forces ◽  
6 Degrees Of Freedom

Abstract Contemporary material testing applications such as high throughput material testing under realistic conditions, emulation of in-service loading conditions for the qualification of additively manufactured parts, material failure and damage propagation modeling validation and material constitutive characterization, are all underscoring the demand for an automated multiaxial testing capability. In order to address these needs, the present work introduces the initial progress of the design and prototyping of a 6 degrees of freedom (6-DoF) robotic system to be used as such a testing infrastructure. This system is designed to be capable of enforcing 6-DoF kinematic or force controlled boundary conditions on deformable material specimens, while at the same time measuring both the imposed kinematics and the corresponding reaction forces in a fully automated manner. Furthermore, as an extension to our previously prototyped systems, the system proposed here is designed to apply both quasi-static loading but also cyclic loading for enabling multiaxial fatigue studies. In addition to the architecture, the design and current status of its implementation for the most critical sub-systems is presented.

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