The single grain scratching SPH simulation model was established to study the subsurface damage of optical quartz glass. Based on analysis stress, strain and force during scratching, generation propagation cracks were studied by combining with scratch elastic stress field model. results show that generate firstly at elastic-plastic deformation boundary in front (? = 28°) due influence maximum p...

Conservation-tillage farming systems have changed agriculture and brought new challenges to the wildlife damage field. Associated minor problems may result from the presence of rattlesnakes (Crotalus viridis) or badgers (Taxidea taxus), but sprout-pulling damage by birds has not been reported. Rodents dig and consume newly planted corn. At least 14 small mammal species have been captured in not...

Weight minimization triggered the automotive industry to introduce new advanced high strength steels that show ductile fracture by microvoid evolution under deformation, resulting in unexpected failure without significant necking. Therefore, an extensive study was initiated to gain insight on the formation and development of microstructural damage in dual phase (DP) steel from a mechanical poin...

A study has been made of Hertzian contact damage in compressive shear stress field beneath the contact area. The observed microcrack density increases with grain size, porous and dense liquid-phase-sintered aluminas. Indentation stress–strain curves show increasing nonlinearity as the implying a threshold microstructural scale for crack initiation. In contrast, the micromechanisms controlling f...

Energy dissipation on collisions of grain aggregates is investigated taking into account effects by sintering. It is shown that sintering significantly reduces the energy dissipation efficiency because contacts between adjacent grains become strong by sintering.

Cold-induced sweetening (CIS) is the accumulation of reducing sugars in potato tubers at low storage temperatures. It is undesirable because it results in dark fry products. Our study evaluated the relationship between genetic resistance to CIS and two starch parameters, amylose content and starch granule size. We found that the amylose content in four CIS-resistant varieties was higher than th...

Application of magnetic Barkhausen emission (MBE) analysis for assessment of microstructures and damage in various materials including carbon steel, Cr-Mo ferritic steels, 17-4 PH steel and metastable austenitic stainless steel has been highlighted in this paper. Thermally induced microstructural changes in Cr-Mo steels have been correlated with MBE, based on a two stage magnetization process m...

one of the soil and water management practices in order to delay drought stress under water deficit condition; is superabsorbent application. in order to study the effect of  superabsorbent application on yield and yield components, two antioxidant enzymes activity and water relation of two canola hybrids under terminal drought stress condition, a research was carried out in ahvaz climate condi...