Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Shear Stress

Influence of Poypropylene Fibers on the Soil Stabilization

Heba Dawood Salim

Engineering and Technology Journal, 2013, Volume 31, Issue 20, Pages 316-323

In this paper the polypropylene fiber was chosen as the additive material to know how it is effect on the soil stabilization, which it is used as additive for concret mixture; the polypropylene fiber is inert material and does not interact with water. The paper studies the addition of this material to a silty clay soil and its effect on the consistency limits, shear strength and compaction of the blended materials. The results show that there is an improvement in the shear strength only when the addition of the rate 1% and 2%from soil weight; either the effective of the consistency limit it was increasing the water content with increasing the rate of the addition material, because it have drink of water. At the compaction test it was founded that the increasing in dry density at the addition of 1% and 2% and reducing its value at the addition of 3% with increasing of water optimization.

Effect of Reinforced by Zinc Oxide Powder on the Mechanical Properties forUn-saturated Polyester Matrix Composite Material

Engineering and Technology Journal, 2011, Volume 29, Issue 10, Pages 474-484

This research is devoted to the preparation of polymer matrix composite materials by (Hand Lay-Up ) method, where the composite material was prepared from the unsaturated polyester resin (UP) as a matrix reinforced by Zinc Oxide with volume fractions (0% , 1% , 2% , 3% ,4% ) .several of mechanical tests were done and these includes Impact, Bending, Flexural Strength, Shear Stress and Hardness, Result of the
tests shows that the values of (Bending elastic modulus, Flexural Strength , Fracture Toughness, Hardness and Shear Stress) increase with the increase of Zinc Oxide particle volume fraction, but the values of Impact Strength decreased with the increases of volume fraction of Zinc Oxide particles.

Studying the Behavior of Axially Loaded Single Pile in Clayey Soil with Cavities

Shaymaa Tareq Kadhim

Engineering and Technology Journal, 2011, Volume 29, Issue 8, Pages 1619-1630

This paper deals with the interaction between cavities and adjacent axially loaded pile in clayey soil using the three dimensional finite element program (ANSYS 11.0).Three dimensional SOLID45 and SOLID65 elements were used to model the soil and the reinforced concrete pile respectively. Druger- Prager model is chosen to simulate the non-linear elastic-plastic clayey soil, concrete model is used to simulate the nonlinear behavior of concrete pile, the steel bars are assumed to be embedded in concrete section. A comparison of the behavior of load-settlement curve, shear stress on pile (τxy) and lateral soil stress on pile (σx) is made for cases of the variation in the cavity positions in the vertical direction (Z-direction) with case of no cavity. It has been found that the effect of the cavity on the shear stress along pile length (τxy) and on the lateral soil stress on pile
(σx) is ignored to the depth greater than (20%) of the pile length from the ground level. Furthermore, the load-settlement curves are quite difference if compared with reference case of no cavity due to the cavity position near the face of pile.

One Parameter Composite Semigroups of Linear Bounded Operators in Strong Operator Topology of Schatten Class Cp

Samir Kasim Hassan; Al-Taie M; Al-Malki Anam; Al-Attar Abeer; Mustafa Khaleel Ismael; Fatema Ahmed Sadeq; Radhi A .Zboon; Jehad R.Kider; Samir K .Hassan; Hussain J. M. Alalkawi; Raad H. Majid; Rawaa A. Alomairy; Luma Abdul Ghani Zghair; Hadia Kadhim J.Al-Ogili; Assifa M. Mohamad; Abbas Sheyaa Alwan; Haider L. Aneed; Assim H Yousif; Salema Sultan Salman; Abbas Hussien Miry; Abduladhem A.Ali; Mohammed Zeki Al-Faiz; Sabah N. mahmood; Khansaa Dawood Selman; Shaymaa Tareq Kadhim

Engineering and Technology Journal, 2011, Volume 29, Issue 8, Pages 1463-1470

For semigroups of linear bounded operators on Hilbert spaces, the problem of
being in Cp , 0 Keywords