Chris Leistner

• Clausthal University of Technology

In this article, several aspects of material parameter identification are addressed. We compare several methods to identify material parameters of a constitutive model for small strain, linear elastic transverse isotropy based on experimental data of specimens made from composite plates. These approaches range from identifying the five material par...

In this study, the monotonic and cyclic material properties of steel material of medium static strength produced additively in the wire arc additive manufacturing (WAAM) process were investigated. This investigated material is expected to be particularly applicable to the field of mechanical engineering, for which practical applications of the WAAM...

This article discusses several aspects of the curing process in polymers. First, we collect experimental data for an Araldite epoxy resin and calibrate the classical model of Kamal–Sourour. It is shown that there are strong correlations between the parameters in the material parameter identification process. Thus, a curing kinetics model with reduc...

It would be advantageous to have a direct model validation of curing processes of epoxy resin systems. Since a direct measurement of the curing evolution and, thus, validation of curing processes is not yet possible, the temperature development based on the exothermic curing reaction is of particular interest. This aspect represents the main focus...

Nowadays, epoxy resins are extensive applied as a matrix in fiber‐reinforced materials. However, its production process is very sensitive to temperature control. High process temperatures substantially accelerate the exothermic production process, which can lead to combustion. Therefore, a constitutive model of the matrix material must be provided...

Knowledge about the volumetric behavior of epoxy resins (chemical shrinkage) during curing is a basic requirement for constitutive modeling of curing processes in Continuum Mechanics. This paper covers shrinkage measurements while a special hot anhydrid-curing epoxy resin cures. The measuring method is based on Archimedes’ principle also for elevat...

The exothermic curing reaction of epoxy resins comes along with chemical shrinkage of the material. There do not exist established standard methods for determining the chemical shrinkage during the curing process. To this end, shrinkage measurements based on Archimedes' principle have been carried out for pure epoxy resin at different curing temper...