Brittleness of Steels under Stress Concentration (Report 2)

Effects of Growth Stimulator Microbes on Growth and Ions Concentration of Stevia under Salinity Stress Conditions

Soil salinity and water deficit are major problems for development of agricultural production. In this study, effects of growth promoting microorganisms (inoculation with Piriformospora indica and two isolates of Streptomyces sp.) on the leaf yield and absorption rate of some elements in leaves and roots of stevia plant was investigated under salinity conditions for two consecutive years (2016-...

Brittleness revisited

The concept of brittleness plays a crucial role in the development of tight oil and gas as it reflects a rock’s ability to fail and maintain a fracture in a hydraulic fracture experiment. Conventional methods that attempt to quantify the degree of brittleness associated with a rock mass have a few shortcomings. For example, failure criteria are not used and only the effective moduli are conside...

Composite Strips with a Circular Stress Concentration under Tension

A series of tensile experiments were performed on S2 glass/toughened epoxy composite strips with a center hole or a pin joint at various temperatures within the range of −60C and 125C. Four different lay-up configurations each of 24 layers: [0°], [0°/90°], [45°/−45°] and [0°/45°/90°/−45°] and four different hole diameters: 1/8”, 1/4”, 3/8”, 1/2” were used in both types of specimens. For certain...

Effects of Stress on the Magnetic Properties of Steels

where T is temperature, S is entropy and J.1oaM2/2 is the self-coupling energy. The dimensionless term a. has been defined previously [2] and represents the strength of the coupling of the individual magnetic moments to the magnetization M. The effective magnetic field causes a change in magnetization, and therefore is determined by the derivative of this energy with respect to magnetization M....

Effect of Humic Acid on Some Morphological and Biochemical Properties and Mineral Nutrients Concentration of Aloe Vera under Salinity Stress