Elastography is a new imaging modality where elastic tissue parameters related to the structural organization of normal and pathological tissues are imaged. Basic principles underlying the quasi-static elastography concept and principles are addressed. The rationale for elastographic imaging is reinforced using data on elastic properties of normal and abnormal soft tissues. The several orders o...

Our objectives were to characterize colonic viscoelastic properties of the human descending colon by assessing pressure-volume (P-V) relationships during barostatic balloon distension. In 16 healthy subjects, a balloon was inflated to 44 mmHg and then deflated to 0 mmHg in 4-mmHg steps at 10, 30, and 60 ml/min, allowing volume fluctuations to stabilize at each pressure increment. Thereafter, th...

Abstract In order to investigate the effect of different double-pulse solid rocket motor metal diaphragm configurations on opening performance, a compartment device is designed. A modified Johnson-Cook principal structure model and damage criterion are used simulate pressure-bearing forces based finite element software. obtain parameters J-C model, Quasi-static tensile tests at strain rates 10 ...

This paper presents an experimental, numerical, and analytical study of a novel specimen subjected to local in-plane load, investigate its crushing deformation resistance. The was designed fabricated simplify the cruciform structure in double-hulled vessels external loads during collision grounding incidents. results will provide reliable insights into scenarios as well side vessels. A quasi-st...

An anisotropic damage model is employed in order to simulate the fracture pattern of Bohus granite under quasi-static (Q-S) spherical indentation loading. The chosen description added previously Drucker–Prager (DP) plasticity with variable dilation angle. resulting constitutive implemented behavior up load capacity material. initial fragmentation, corresponding first small load-drop force–penet...

High-gain optical parametric amplification is an important nonlinear process used both as a source of coherent infrared light and nonclassical light. In this work, we experimentally demonstrate approach to that enables extremely large gains with low energy requirements. conventional media driven by femtosecond pulses, multiple dispersion orders limit the effective interaction length available f...

This research work focuses on the experimental investigation of indentation damage resistance and post-indented performance different stacking sequence glass/epoxy laminates using mechanical acoustic responses. The with sequence, namely [0]12, [0/90]6S, [+45/-45]6S [0/+45/-45/90]3S were subjected to normal inclined emission monitoring. Quasi-static (QSI) test was conducted center a hemispherica...