• Performed static and dynamic indentation experiments Characterized deformation mechanism through 3D DIC Observed pronounced non-monotonic strain rate effects Formulated enhanced Deshpande-Fleck plasticity model Incorporated both strain-rate hardening softening The safety of electric vehicles under crash event depends on the mechanical behavior Lithium-ion cells large at high rates. Here, an e...

In this study, isothermal compression tests of TB18 titanium alloy were conducted using a Gleeble 3800 thermomechanical simulator for temperatures ranging from 650 to 880 °C and strain rates 0.001 10 s−1, with constant height reduction 60%, investigate the dynamic softening mechanisms hot workability alloy. The results showed that flow stress significantly decreased an increasing deformation te...

-Dislocation theory is used to invoke a strain gradient theory of rate independent plasticity. Hardening is assumed to result from the accumulation of both randomly stored and geometrically necessary dislocations. The density of the geometrically necessary dislocations scales with the gradient of plastic strain. A deformation theory of plasticity is introduced to represent in a phenomenological...

an important concern in rock mechanics is non-homogeneity as joints or fault. adopting the joints as fractures, fractures are well known for their effects on the mechanical and transport properties of rock. it has been postulated that through fractured/jointed rock, mainly, the polygons turned to the shear vector (ti) are involved in the mobilization of shear resistance. consequently, in order ...

The structural complexity of soft gels is at the origin of a versatile mechanical response that allows for large deformation, controlled elastic recovery, and toughness in the same material. A limit to exploiting the potential of such materials is the insufficient fundamental understanding of the microstructural origin of the bulk mechanical properties. Here we investigate the role of the netwo...

Commercially pure nickel was processed by equal channel angular pressing (ECAP) through route Bc for 12 passes to obtain an ultrafine grained (UFG) microstructure and further subjected to an ultrasonic treatment (UST) which introduced a maximum amplitude equivalent to anormal stresses of 100 MPa in a steady state regime. It was observed that the microstructure of UFG Ni can be differently alter...

Gradient structure (GS) possesses a typical trans-scale grain hierarchy with varying internal plastic stability, and the mutual accommodation plays crucial role in its superior strength-ductility combination. Using in-situ synchrotron X-ray diffraction (XRD) during tensile loading, we measured lattice strains sequentially from nanostructured (NS) surface layer to central coarsegrained (CG) eluc...

Collagen, a molecule consisting of three braided protein helices, is the primary building block of many biological tissues including bone, tendon, cartilage, and skin. Staggered arrays of collagen molecules form fibrils, which arrange into higher-ordered structures such as fibers and fascicles. Because collagen plays a crucial role in determining the mechanical properties of these tissues, sign...