In this paper, the influence of aggregate size and volume fraction on shrinkage induced micro-cracking and permeability of concrete and mortar was investigated. Nonlinear finite element analyses of model concrete and mortar specimens were performed. The aggregate diameter was varied between 2 and 16 mm. Furthermore, a range of volume fractions between 0.1 and 0.5 was studied. The nonlinear anal...

Stationary and moving plane heat source analysis have application in several manufacturing processes such as metal cutting, spot welding, laser cutting/surface treatment (using CO2 or Argon lasers) as well as tribological applications including ball bearing and gear design [1-5]. Temperature profile and the rate of cooling at and near the surface can affect the metallurgical microstructures, th...

In this paper we present a model of fracture formation on surfaces of bi-layered materials. The model allows synthesis of realistic patterns occurring in nature as a result of cracking induced by growth or shrinkage of one layer with respect to another. Two different discretizations of the problem are discussed. First we revisit an existing mass-spring approach, then we introduce an approach ba...

Soil salinity is one of the parameters used for determining extent soil salinization. During water evaporation, surface salt-affected soils in Songnen Plain, China, exhibits obvious shrinkage and cracking phenomena due to high salt content. The aim this current study quantify influence content on shrinkage–cracking process achieve quantitative extraction based different crack parameter types. I...

Cementitious materials shrink when exposed to decreasing relative humidities, which may result in cracking. Shrinkage reducing admixtures (SRAs) can be used reduce this drying shrinkage. Although many studies have shown that SRAs the surface tension of pore solution, effects on other solution properties and their relationship shrinkage been poorly characterized. In work, we investigate impact a...

Aluminum alloy welding suffers from problems such as solidification cracking and hydrogen-induced porosity, which are sufficiently severe to limit its potential applications. Because mitigated porosity incidence and solidification cracking are observed in aluminum welds using double pulsed gas metal arc welding (DP-GMAW), a comprehensive review of the mechanism is necessary, but absent from the...

Desiccation cracking is a natural phenomenon caused by drying in near-surface earth soils subjected to constrained shrinkage. In this research, the water retention curve of two clayey soils, prepared compaction under standard proctor conditions, are determined study desiccation cracking. Two techniques suction control applied process and reach soils. For values higher than 4 MPa, saline-solutio...