Laser-based powder bed fusion, due to its layer-by-layer nature, results in a unique stress profile part after the primary production process. The residual stresses are typically tensile near top, while they compressive bottom of part. When it is removed without proper precautions, will bend excessively. In order alleviate this deformation, relief heat treatment can be applied. paper, such rela...

There is increased interest in using nickel aluminum bronze (NAB) alloys large-scale directed energy deposition additive manufacturing (DEDAM) processes for maritime applications, but one challenge lies the component distortion that results from residual stress generated during fabrication. This paper describes development and evaluation of thermo-mechanical simulations laser hot wire (LHW) DED...

Hot forging of an Fe-Ni-Co alloy used for aeronautical purposes has been modeled using the commercial software ABAQUSTM/Explicit in order to obtain all the mechanical and thermal information to proceed with piercing and ring rolling. The material used is a 909 Incoloy type super alloy and it is used for the energy generation industry. Information of the constitutive behaviour of the alloy was i...

A complete thermo-hydro-mechanical model is presented to tackle the complex coupling problems encountered in clay barriers. A detailed formulation coupling the heat, moisture (liquid water and water vapour) and, air transfer in a deformable unsaturated soil is given. The formulation of the AlonsoGens’s mechanical model for unsaturated soil is also incorporated. The sensitivity to some parameter...

INTRODUCTION Qconv SUGAR is a simulation package for 3D MEMS devices that utilizes nodal analysis techniques [1]. It has been shown that nodal analysis is significantly faster than other simulation techniques and can be just as accurate. The latest version of SUGAR (v2.0) includes various models for 2D and 3D beams, electrical beams, and gap closing actuators [2]. In addition, SUGAR is easily e...

In this work, a meshfree method is used to simulate thermo-mechanical ductile fracture under finite deformation. A Galerkin meshfree formulation incorporating the Johnson-Cook damage model is implemented in numerical computations. We are interested in the simulation of thermomechanical effects on ductile fracture under large scale yielding. A rate form adiabatic split is proposed in the constit...

In this work, thermo – elastic analysis for functionally graded thick – walled cylinder with temperature - dependent material properties at steady condition is carried out. The length of cylinder is infinite and loading is consist of internal hydrostatic pressure and temperature gradient. All of physical and mechanical properties expect the Poisson's ratio are considered as multiplied an expone...

A new, computationally efficient algorithm has been implemented to solve for thermal stresses, strains, and displacements in realistic solidification processes which involve highly nonlinear constitutive relations. A general form of the transient heat equation including latent-heat from phase transformations such as solidification and other temperature-dependent properties is solved numerically...

Green biomass can efficiently be separated into a fiber rich fraction and a green juice with the TAMD process. This process combines a mechanical pressing and a moderate heating of the walls of the apparatus. This work aims to investigate the influence of the biomass water potential on the kinetic and to identify the optimal processing conditions. If the TAMD process is used as a pre-treatment ...