Ultrasonic impact peening (UIP) is not only a mature technique of surface treatment, but also promising method texturing for promoting performance and functionalities components devices. In the present work, we demonstrate feasibility applying UIP in manufacturing high precision micro-structures on 316L stainless steel using YG6 cemented carbide tool. Specifically, analytical investigation mate...

This paper suggests an optimization-based methodology for the design of minimum weight structures with kinematic nonlinear behavior. Attention is focused on three-dimensional reticulated structures idealized with beam elements under proportional static loadings. The algorithm used for optimization is based on a classical optimality criterion approach using an active-set strategy for extreme lim...

During the reeling process of reel-lay method, pipe will be subjected to combined loading tension and bending. Excessive ovalization affect structural performance even lead instability pipe. In this paper, a numerical simulation model pipe-reeling is established by finite element tools. The Ramberg–Osgood material used study bending moment cross-section during based on Von Mises plasticity nonl...

Abstract To achieve better anti-vibration performance in a low frequency region and expand the range of vibration isolation, bilateral supported bio-inspired (BBAV) structure composed purely linear elements is proposed, inspired by motion form bird legs nonlinear extension compression muscles tendons. The kinematic relations dynamic model considering vertical rotational vibrations are establish...

Abstract. The mechanical and damage behavior of a X100 steel after prestrain is studied in this work. Experimental results show both a plastic and rupture anisotropy: the T direction exhibits a higher ultimate stress but the lowest ductility and toughness. Prestrain reduces ductility and crack growth resistance. A model able to represent the plastic and damage behaviour of the material before a...

A constitutive theory for orthotropic materials is briefly summarized. The constitutive theory allows for anisotropy of the elastic response and anisotropy resulting from both the yield function and the kinematic hardening. The formulation also includes a constitutive theory, thermodynamically consistent, for the plastic spin and the re-orientation of the anisotropy properties towards a more fa...

The quasi-static evolution of an elastoplastic body with a multi-surface constitutive law of linear kinematic hardening type allows the modeling of curved stress-strain relations. It generalises classical small-strain elastoplasticity from one to various plastic phases. Firstly, we briefly recall a mathematical model represented by an initial-boundary value problem in the form a variational ine...

This note deals with two-mechanism models (= 2M models). 2M models (or, generally, multimechanism models) are a useful tool for modelling of complex material behavior. They have been studied and applied for the last twenty years. This note is focused on the modelling of 2M models in continuum-mechanical framework mainly in the case of plastic behaviour. In particular, some classes of 2M models ...

The quasi-static viscoplastic resp. elastoplastic evolution problem with isotropic or kinematic hardening is considered with emphasis on optimal convergence and adapted mesh-refining in the spatial discretization. Within one time-step of an implicit time-discretization, the finite element method leads to a minimisation problem for non-smooth convex functions on discrete subspaces. For piecewise...

An integrated approach for all necessary variations within direct analysis, variational design sensitivity analysis and shakedown analysis based on Melan’s static shakedown theorem for linear unlimited kinematic hardening material behavior is formulated. Remarks on the computer implementation and numerical examples show the efficiency of the proposed formulation. Important effects of shakedown ...