The Audible Frequency Contest

Rubber Versus Steel Vibration Isolators

The audible frequency axial dynamic stiffness of three vibration isolators plausibly used in the design of a ship main engine suspension system are examined and compared for different static preloads. An indirect measurement method is used to investigate the blocked dynamic transfer stiffness using a specially designed test rig displaying a strong frequency dependence where […] mehr...

3.November 2005 - Neues aus der Forschung

Technische Produkte

Study on Fiber Orientation Measurement Technique Using Anisotropic Magnetic Particles

The authors propose a new technique for measuring fiber orientation in molded roducts by using anisotropic magnetic particles. The technique was applied to analyzing glass fiber orientation in NBr compounds, containing 5 wt% and 20 wt% glass-fibers, under repeated roll calendering. The validity of the technique was examined. Needle magnet particle of Co-c- Fe2O3 were […] mehr...

14.April 2004 - Neues aus der Forschung


Cross-link Clusters: reality or fiction? – A review of the state of the art, enlarged with recent AFM-data

One of the intriguing questions has always been how chemical rubber-networks really look like. One possible explanation for the fundamental differences in properties between sulphur and peroxide cured networks, is that the cross-links formed by either of the two tend to cluster leading to what we will call network heterogeneity. The paper gives an overview […] mehr...

28.April 2003 - Neues aus der Forschung

Technische Produkte

Sliding Behavior of Rubber on Snow and Concrete Surfaces

Over the last years great efforts were directed to the numerical description of the sliding behavior of rubber blocks on various surfaces by means of the Finite Element (FE) Method. Two major mechanisms of the load transfer of traction forces can be observed depending on the characteristics of the sliding surface. On “soft” surfaces, i. […] mehr...

28.April 2003 - Neues aus der Forschung

Institute & Verbände

Determining Energy of Rubber Cylinders Using FEA

The objective of this study was to calculate strain energy for a rubber cylinder using finite element analysis (FEA) and compare using analytical equations for simple extension, bonded tension, and bonded compression. Constitutive laws were derived for simple extension including linear, large deformation, and hyperelastic material models. The strain energy or work done on the […] mehr...

28.April 2003 - Neues aus der Forschung