نتایج جستجو برای: principal normal stress
تعداد نتایج: 1083280 فیلتر نتایج به سال:
Abstract In this study, we investigated the physiological responses of maize with different amylose content at seedlings to drought stress. For waxy (WMS) and normal (NMS), decline photosynthesis under stress (DS) was due stomatal limitation. DS increased non-photochemical quenching coefficient (NPQ), whereas decreased activities peroxidase (POD) plant height (PH), compared plants irrigation. T...
Basic properties of a newly defined yield criterion are explored and then applied to plane stress, mode I, perfectly plastic crack problems. This condition began as perturbation the traditional Tresca condition. In previous study, relationship was found for that spanned von Mises criteria in principal stress plane. this distinct but related is used those cases where lies on or outside For these...
The residual stresses at a circular punched end face in tempered martensitic high-strength steel sheets were investigated using triaxial stress analysis via X-ray diffraction. maximum principal and its direction calculated from the measured nine components. relationship between directions of hydrogen cracks was verified by generating on same specimen cathodic charging. perpendicular to that str...
Drought stress is an important limiting factor for plant growth. Using selection indices, it is possible to identify cultivars with high yield in normal and stressed conditions. So, the genetic analysis of drought tolerance indices can play important role in plant breeding programs. In order to identify molecular markers linked with drought tolerance indices in sunflower, 72 recombinant inbre...
Cells comprising a tissue migrate as part of a collective. How collective processes are coordinated over large multi-cellular assemblies has remained unclear, however, because mechanical stresses exerted at cell-cell junctions have not been accessible experimentally. We report here maps of these stresses within and between cells comprising a monolayer. Within the cell sheet there arise unantici...
The strength failure of brittle materials under complex stress is an important problem. Herein, we propose a novel three-parameter twin τ2 theory considering the influence hydrostatic pressure and normal on principal shear-stress surface, derive mathematical expression for theory, compare theoretical predictions several states with existing experimental data. results show that different ultimat...
We extend a full-waveform modeling method to invert source focal-plane mechanisms for microseismic data recorded with dual-borehole seismic arrays. Combining inverted focal-plane mechanisms with geomechanics knowledge, we map the pore pressure distribution in the reservoir. Determining focal mechanisms for microseismic events is challenging due to poor geometry coverage. We use the P-wave polar...
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