Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Lode angle"”.
-
Ductile fracture modeling : theory, experimental investigation and numerical verification
… the hydrostatic pressure and is dependent on the Lode angle. The damage plasticity model is established on a "cylindrical decomposition" system accounting for the pressure dependence, Lode angle dependence and the non-linear damage rule. Two internal variables are adopted to quantify the evolution …
-
Effect of loading history in necking and fracture
The effect of Lode angle parameter, or the third deviatoric stress invariant, on plasticity and fracture is studied using flat-grooved transverse plane strain specimens. A generalized asymmetric plasticity model for isotropic materials with both pressure and Lode angle dependence is developed. …
-
Experimental investigation and constitutive modeling of the large deformation behavior of anisotropic steel sheets undergoing strain-induced phase transformation
… the influence of both the stress triaxiality and Lode angle parameter on the austenite-to-martensite transformation kinetics. A stress-state dependent transformation kinetics evolution equation is proposed which describes the martensite content as a function of plastic strain, the stress …
-
Fracture and plasticity characterization of DH-36 Navy steel
… is expressed by the stress state invariants of Lode angle and triaxiality.
-
An experimental and theoretical study on the effect of strain rate on ductile damage
… to material parameters such as triaxiality, lode angle and strain rate in a specimen, which is verified using experiments performed under various loading conditions and strain rates.
-
Finite deformation of particulate geomaterials: frictional and anisotropic Critical State elasto-plasticity
… plasticity model based on a modified Reuleaux triangle. It is shown, through comparison with experimental data, that this model has advantages over the classical Mohr-Coulomb and Drucker-Prager models whilst still allowing for analytical implicit stress integration. An isotropic hyperplastic …
-
Edge fracture of AHSS sheets under out-of-plane loading followed by in-plane loading
… with dependence on both stress triaxiality and Lode angle parameter. The proposed model successfully predict edge fracture in numerical simulation.
-
Ductile fracture at intermediate stress triaxialities : experimental investigations and micro-mechanical modeling
… each experiment in terms of stress triaxiality, Lode angle parameter and equivalent plastic strain and show a non-monotonic and strong dependence of ductility to stress state. The extensive fracture characterization is used to evaluate the predictive capabilities of two phenomenological and …
-
Experimental and numerical study on the effect of strain rate to ductile damage
… influences ductile fracture is related to the Lode angle, which is a measure of the third deviatoric stress invariant.
-
Phase-field modeling of fracture: regularization length insensitivity and mixed mode ductile fracture
… implicitly includes the important effects of lode angle (via the maximum shear stress) and triaxiality (via the first principal stress and pressure) on the initiation and propagation of ductile fracture. Model predictions of slant and cup cone crack paths as well as load-displacement responses …
-
Ductile fracture after complex loading histories : experimental investigation and constitutive modeling
… plastic strain, stress triaxiality and Lode angle parameter using the material's isotropic hardening law. Experimental results are presented for three different advanced high strength steels. For each material, the onset of fracture is characterized for five distinct stress states, …
-
Analytical and Experimental Investigation of Low-Cycle Fatigue Fracture in Structural Steel
The mechanism of metal material failure due to inelastic cyclic deformations is commonly described as Low-Cycle Fatigue (LCF). Fracture in steel structures caused by earthquakes can be associated with this mechanism. Mathematical expressions describing the material deterioration due to LCF are …