Johannes Neumann

Johannes Neumann
University of Wuppertal | Uni-Wuppertal, BUW · Civil Engineering Mechanics

Dr.-Ing.

About

12
Publications
1,445
Reads
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121
Citations
Additional affiliations
January 2018 - present
ISAC GmbH
Position
  • Engineer
April 2011 - December 2017
RWTH Aachen University
Position
  • Research Assistant
May 2007 - August 2009
RWTH Aachen University
Position
  • Student Assistant
Education
April 2011 - June 2019
RWTH Aachen University
Field of study
  • Civil Engineering
October 2004 - January 2011
RWTH Aachen University
Field of study
  • Computational Engineering Science

Publications

Publications (12)
Article
Full-text available
Modern μ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\upmu$$\end{document}-CT scans offer non-destructive three-dimensional microstructure analysis of various materi...
Article
Nowadays, paper is no longer used only as a writing and printing material. In addition to its use as a packaging material, it is an important substitute for products that were previously made from carbon‐based resources. Due to its high recycling potential, paper will very likely become even more important in the future. Therefore, it is essential...
Article
In this research project FE 04.0316/2018/ORB “Development of an up-to-date tool for mathematical dimensioning according to the RDO Beton”, the RDO Beton are implemented in an open-source and future-proof manner. The foundations are the RDO Beton 09 employing the draft version of 7th May 2018, which will be referred to only as RDO Beton in the follo...
Chapter
Computational homogenisation is a useful tool to predict the macroscale response of composite materials without the cumbersome experimental programme. However, careful verification is required for computational methods as well. A recently proposed method to create synthetic 3D mesoscale models of hot mix asphalt uses Voronoi polyhedra to represent...
Thesis
Asphalt is one of the oldest construction materials known to mankind. Unfortunately, it is also one the most complex materials. Asphalt exhibits elastic, viscous and plastic properties. Furthermore, it damages and shows significant ageing over the course of a few decades. These properties are inherited mostly from the bituminous binder. However, asp...
Article
The properties of particulate materials are influenced by purely geometric properties like size, size distribution, and shape. However, size is an ambiguous quantity for non-spherical particles. Therefore, the impact of particle shape on the size as measured by several common and original estimators is investigated. Particularly, a high-fidelity di...
Article
A versatile framework to create 3D mesoscale models of hot mix asphalt is presented. The mortar phase of a German standard hot mix asphalt is tested in the linear viscoelastic regime using a modified dynamic shear rheometry setup. The widely used generalised Maxwell-model is fit to master-curve data. Virtually any particle size distribution can be...
Article
Increasing requirements on the durability of road pavements demand the conception of innovative asphalt types. Particularly the stability under load needs improvement in order to prevent rutting. Since the load bearing capabilities of asphalt are mainly governed by the granular lattice and the binder that glues the rocks together, simulation based...
Article
Sandwich structures made of sheets of composite materials are in widespread use, particularly in the transportation industry. Finite Element simulation of the thin, tesselated structures with complex, three-dimensional material behaviour is a challenging task for the underlying element technology. In particular, frequently used linear isoparametric...
Article
Recent experimental and computational studies have shown that transmurally heterogeneous material properties through the arterial wall are critical to understanding the heterogeneous expressions of constituent degrading molecules. Given that expression of such molecules is thought to be intimately linked to local magnitudes of stress, modelling the...

Questions

Question (1)
Question
The groundbreaking works in dimensioning concrete pavement slabs are from the first half of the previous century. Later works seem to give the resulting formulas for stresses and deflections only.
However, I'd like to learn HOW these formulas have been derived, particularly, since there seems to be a lot of confusion about the "proper" formulas.
The starting point seems to be Kirchhoff-Love plate theory with an elastic foundation, but i cannot figure out the details. Can anybody point out where/how to obtain the original articles, or a body of research that contains the derivations.
I am interested in the following works, mainly be Westergaard and Bradbury:
* Westergaard, H.M. (1926) Stresses in Concrete Pavements Computed by Theoretical Analysis. Public Roads, 7, 25-35. https://trid.trb.org/view/97833 (This is presumably the same as COMPUTATION OF STRESSES IN CONCRETE ROADS: https://trid.trb.org/view/104894)
* Westergaard, H.M. (1927) ANALYSIS OF STRESSES IN CONCRETE PAVEMENTS DUE TO VARIATIONS OF TEMPERATURE. Highway Research Board Proceedings, 6, 201-215. https://trid.trb.org/view/105055
* Bradbury, R.D. (1938) REINFORCED CONCRETE PAVEMENTS https://trid.trb.org/view/99468
* Westergaard, H.M. (1948) NEW FORMULAS FOR STRESS IN CONCRETE PAVEMENTS OF AIRFIELDS. American Society of Civil Engineers Transactions, 113, 425-444. https://trid.trb.org/view/97836
* WESTERGAARD, H M and Holl, D L and Bradbury, R D and Spangler, M G and Sutherland, E C (1940) STRESSES IN CONCRETE RUNWAYS OF AIRPORTS. Highway Research Board Proceedings, 19, 197-205. https://trid.trb.org/view/105121
Kind regards,
Johannes

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