scholarly journals Tensile strength of granular aggregates: Stress chains across particle phase versus stress concentration by pores

2020 ◽  
Vol 102 (2) ◽  
Author(s):  
Xavier Frank ◽  
Farhang Radjaï ◽  
Saied Nezamabadi ◽  
Jean-Yves Delenne
Keyword(s):  
Tensile Strength ◽  
Stress Concentration ◽  
Particle Phase ◽  
Phase Versus

Influence of Stress Concentration on Fatigue Property of Welded Joints of 5083 Aluminum Alloy

2013 ◽  
Vol 456 ◽  
pp. 451-455
Author(s):  
Jun Yang ◽  
Bo Li ◽  
Qiang Jia ◽  
Yuan Xing Li ◽  
Ming Yue Zhang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Fatigue Strength ◽  
Stress Concentration ◽  
Welded Joints ◽  
Weld Zone ◽  
Fatigue Property ◽  
Concentration Coefficient ◽  
5083 Aluminum Alloy ◽  
Stress Concentration Coefficient

Fatigue test of the welded joint of 5083 aluminum alloy with smooth and height of specimen and the weld zone than the high test measurement and theoretical stress concentration coefficient calculation, the weld reinforcement effect of stress concentration on the fatigue performance of welded joints. The results show that: Smooth tensile strength of specimens for 264MPa, fatigue strength is 95MPa, the tensile strength of the 36%. Higher tensile strength of specimens for 320MPa, fatigue strength is 70MPa, the tensile strength of the 22%. Higher specimen stress concentration coefficient is 1.64, the stress concentration to the weld toe becomes fatigue initiation source, and reduces the fatigue strength and the fatigue life of welded joints.

Mechanical Properties of 5083 Aluminium Welds after Manual and Automatic Pulsed Gas Metal Arc Welding Using E5356 Filler

2010 ◽  
Vol 654-656 ◽  
pp. 2560-2563 ◽  
Author(s):  
Kalenda Mutombo ◽  
Madeleine du Toit
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stress Concentration ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Fatigue Properties ◽  
Filler Wire ◽  
Metal Arc Welding ◽  
Weld Toe ◽  
Fully Automatic

Semi-automatic and automatic pulsed gas metal arc welding (GMAW) of aluminium alloy 5083 with ER5356 filler wire causes considerable softening in the weld. The tensile strength of dressed automatic welds approaches that of the base metal, but the stress concentration caused by the weld toe in undressed semi-automatic welds reduced the tensile strength significantly. Fully automatic welds displayed improved fatigue properties compared to semi-automatic welds.

Fracture of Amorphous Polymeric Solids: Time to Break

1965 ◽  
Vol 38 (2) ◽  
pp. 263-277
Author(s):  
J. C. Halpin
Keyword(s):  
Tensile Strength ◽  
Stress Concentration ◽  
Nonlinear Response ◽  
Failure Process ◽  
High Stress ◽  
Viscoelastic Body ◽  
Simple Process ◽  
High Stress Concentration ◽  
Failure Theory ◽  
Fracture Theory

Abstract The failure theory of Bueche and Halpin is generalized and expanded to obtain a prediction of the time dependence of tensile strength and ultimate elongation. The model pictures rupture as propagation of tears or cracks within the material. The growth of a tear or crack is viewed as an ideally simple process in which the molecular chains at the tear tip stretch viscoelastically under the influence of a high stress concentration until they rupture. As a consequence, the failure process is a nonequilibrium one, developing with time and involving the consecutive rupture of the molecular chains. Substantial support for the theory is found by comparing the theoretical prediction with experimental results obtained for SBR and EPT. In addition, it is experimentally demonstrated that delayed and forced rupture experiments can yield qualitatively identical data for viscoelastic bodies. Also discussed is the basis for the approach to the nonlinear response of a viscoelastic body required here in the development of a fracture theory.

Effects of Sm on Microstructure and Mechanical Properties of Mg-5.5Al -0.5Y Alloy

2010 ◽  
Vol 146-147 ◽  
pp. 267-271
Author(s):  
Chang Qing Li ◽  
Quan An Li ◽  
Xing Yuan Zhang ◽  
Qing Zhang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elevated Temperature ◽  
Magnesium Alloy ◽  
Temperature Increase ◽  
Room Temperature ◽  
Particle Phase ◽  
Microstructure And Mechanical Properties ◽  
Mg17al12 Phase

The microstructure and mechanical properties of aged Mg-5.5Al-0.5Y magnesium alloy with Sm addition were investigated. The results show that with proper content of Sm addition, the microstructure of Mg-5.5Al-0.5Y magnesium alloy is refined obviously. The quantity of β-Mg17Al12 phase is reduced, and Al2Sm particle phase is formed. With the increase of Sm addition, the mechanical properties of the alloy at room and elevated temperature increase at first, and then decrease. When the content of Sm is up to 1%, the values of tensile strength and elongation at room temperature,150 and 175 are up to their maxima synchronously, 244MPa/20.07%, 217MPa/18.86% and 185MPa/19.15% respectively.

Comment on the Effect of Proof Stress on Notched Fatigue Strength

1963 ◽  
Vol 67 (636) ◽  
pp. 798-799
Author(s):  
E. R. Welbourne
Keyword(s):  
Heat Treatment ◽  
Experimental Investigation ◽  
Tensile Strength ◽  
Fatigue Strength ◽  
Stress Concentration ◽  
Elastic Stress ◽  
Proof Stress ◽  
Fatigue Data ◽  
Reversed Loading ◽  
Predicted Values

In his note, Forrest compares the results of an experimental investigation of the notched fatigue strength of HE 15 aluminium alloy (L.64/L.65 type) in three conditions of heat treatment with predicted values obtained using the analysis by Gunn. This analysis appears in R.Ae.S. Fatigue Data Sheets A.00.01 and .02.The analysis requires a minimum knowledge of four parameters, Kt’ the elastic stress concentration factor, ft the tensile strength, ƒp the 0·1 per cent proof stress and Sao the fatigue strength under reversed loading for the specified endurance Ncycles.

A Study on the Tensile Strength of the Layer Splice Laminates

2011 ◽  
Vol 399-401 ◽  
pp. 351-354
Author(s):  
Ling Wang ◽  
Pu Rong Jia ◽  
Gui Qiong Jiao
Keyword(s):  
Finite Element ◽  
Tensile Strength ◽  
Shear Stress ◽  
Stress Concentration ◽  
Experimental Tests ◽  
Tensile Failure ◽  
Resin Matrix ◽  
Laminar Shear Stress ◽  
Element Analysis ◽  
Joint Location

The tensile strength of carbon fiber reinforced resin matrix layer splice laminate was studied. Three specimens (M1.M2.M3) were cut from laminates with different joint location and the number of layer splice. Load schemes were performed and typical load-displacement curves of three specimens were recorded. The result shows that the joint location has seriously effect on the tensile strength and modulus of specimens. The tensile strength of M2 is obviously lower than that of M1 and M3. Furthermore finite element ABAQUS6.5 was also used to simulate the course of experimental test. The result shows that shear stress concentration occurs on the joint of model. The shear stress on the model M1 and M2 has the similar trend and concentrates in the middle of the joint area. And on the model of M3 the shear stress has a completely different trend from the M1 and M2 model. On the M2 the shear stress concentration is slightly higher than the other two. It indicates that the tensile strength of M2 is the lowest among the three models. So, the inter-laminar shear stress is the major factor leading tensile failure. The experimental tests are consistent with the finite element analysis.

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