RESIDUAL STRESS PROPERTIES OF THE WELDED THICK UNDERWATER SPHERICAL PRESSURE HULL BASED ON FINITE ELEMENT ANALYSIS

Residual Stress Properties of the Welded Thick Underwater Spherical Pressure Hull Based on Finite Element Analysis

Residual stress inevitably occurs at the weld in the process of manufacturing thick pressure hulls for manned submersibles, which affects the bearing capacity of the hull.In this study, an electron-beam-welded 32 mm-thick Ti-6Al-4V plate specimen is first tested, then the measured lego.bonsai tree data of residual stress distribution is applied to

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The role of local retinoids in eliminating signs of skin aging

Skin aging is a complex process involving both internal (chronological aging) and external (biological aging) factors.Slowing down the proliferative and immune processes in the epidermis, reducing the activity of fibroblasts and vascularization of the dermis during chronological aging lead to thinning, dryness, hypersensitivity, vulnerability and s

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Pluripotency and its layers of complexity

Pluripotency is depicted by a self-renewing state that can competently differentiate to form the three germ layers.Different stages of early murine development can be captured on a petri dish, delineating a spectrum of pluripotent states, ranging from embryonic stem cells, embryonic germ cells to epiblast stem cells.Anomalous cell populations displ

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