On the Reconstruction of the Characteristics of the Plane Initial Stress State

2020 ◽  
Vol 55 (5) ◽  
pp. 624-632
Author(s):  
A. O. Vatulyan ◽  
R. D. Nedin
Keyword(s):  
Stress State ◽  
Initial Stress ◽  
Initial Stress State

Effects of Complex Initial Stress State Parameters on Dynamic Shear Modulus of Loess

2011 ◽  
Vol 243-249 ◽  
pp. 2601-2606 ◽  
Author(s):  
Zhi Jie Wang ◽  
Ya Sheng Luo ◽  
Hong Guo
Keyword(s):  
Stress State ◽  
Shear Modulus ◽  
Principal Stress ◽  
Initial Stress ◽  
Triaxial Tests ◽  
Dynamic Shear Modulus ◽  
Dynamic Shear ◽  
Initial Stress State ◽  
Foundation Soil ◽  
Stress States

The foundation soil of the buildings and structures is often in complex initial stress states. The dynamic torsional shear triaxial tests are carried out on undisturbed and remodeling loess under different complex initial stress states by using the remolded DTC-199 torsional cyclic load triaxial apparatus, and the effects of each complex initial stress state parameter on dynamic shear modulus of loess are discussed. Results show that, other conditions being the same, the influence of angles of initial principal stressα0on dynamic shear modulusGdof loess show a trend of the biggerα0is, the smallerGdis. The effect laws of efficient of initial intermediate principal stressb0onGdof loess are not obvious. When the dynamic shear strain is larger, the bigger initial deviator stress ratioη0is, the smallerGdof loess is. The influence of initial average principal stresspm0on loess is significant. The biggerpm0is, the biggerGdof loess is.Gdof undisturbed loess is greater than that of remodeling loess under the complex initial stress states.

scholarly journals The general tendency of initial stress state in Japan with the data of in-situ measurements.

1988 ◽  
pp. 71-78
Author(s):  
Toshiaki SAITO ◽  
Tsuyoshi ISHIDA ◽  
Makoto TERADA ◽  
Yutaka TANAKA
Keyword(s):  
Stress State ◽  
Initial Stress ◽  
In Situ Measurements ◽  
General Tendency ◽  
Initial Stress State

EFFECT OF MANUFACTURING ON THE TRANSVERSE RESPONSE OF THERMOSET COMPOSITES

2021 ◽  
Author(s):  
SAGAR P. SHAH ◽  
MARIANNA MAIARU
Keyword(s):  
Stress State ◽  
Initial Stress ◽  
Process Modeling ◽  
Computational Models ◽  
Test Procedure ◽  
Initial Stress State ◽  
Virtual Test ◽  
Matrix Properties ◽  
Composite Response

This study presents a finite element (FE) based virtual test procedure to investigate the effect of the manufacturing process on the transverse composite response. Computational models of the composite microstructures are generated and analyzed in commercial FE solver Abaqus supplemented by user-written subroutines. Several realizations of the composite microstructure with random fiber arrangement are analyzed assuming appropriate initial stress state and material definitions. The virtual test procedure is established to define the evolution of process-induced in-situ matrix properties through direct and inverse process modeling approaches. Subsequently, the composite microstructures are virtually tested in transverse tension to predict the transverse composite properties by implementing progressive damage models. In order to quantify the effect of manufacturing on the transverse composite response, predictions from the two approaches are compared to a third case which assumes an initial stress-free state and neglects the effect of processing conditions on the in-situ matrix properties. Variations of ±5% in average strength and 18% in standard deviations are observed with respect to ideally cured RVEs. It is established that process modeling in necessary to optimize the residual stress state and improve composite performance.

Sign in / Sign up

Export Citation Format

Share Document