
Johannes NeumannUniversity of Wuppertal | Uni-Wuppertal, BUW · Civil Engineering Mechanics
Johannes Neumann
Dr.-Ing.
About
12
Publications
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121
Citations
Introduction
Additional affiliations
January 2018 - present
ISAC GmbH
Position
- Engineer
April 2011 - December 2017
May 2007 - August 2009
Education
April 2011 - June 2019
October 2004 - January 2011
Publications
Publications (12)
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...
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...
https://eccomas.gf.unsa.ba/Eccomas_2023_proceedings.pdf
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...
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...
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...
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...
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...
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...
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...
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)
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