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Strand7 Webnotes

Strand7 Webnotes are a comprehensive online library of resource materials covering Strand7 modelling, application, usage and installation, plus general background and theory of FEA.

Access to the library is available to supported Strand7 users via a secure login and forms part of our Strand7 Support and Maintenance subscription service. To log in you will need your login details, which can be found inside the Strand7 Installation Kit (DVD case). Should you require information about your login details, please email us.

Each Webnote in the library consists of a PDF describing the topic. Most Webnotes also include one or more Strand7 files to help illustrate the practical side.

We aim to continually expand the Webnote library and you will find the latest releases listed in the Recent Additions section. If there is a specific topic that interests you, or you have an idea for a Webnote that you would like to see, please email us.

We welcome your comments and feedback about any Webnotes that you download. We are also interested in hearing from you should you find any errors in them or require further clarification.

Recent Additions

0.6 MB
ST7-1.10.20.20 Static and Dynamic Stiffness
A common transfer function measurement is the Frequency Response Function (FRF). The aim of this Webnote is to give a brief overview of some of these functions, and to take a more detailed look at dynamic stiffness, which is a particular FRF.

26.7 MB
ST7-1.30.20.15 Analysis of Steel Vessel Subjected to Hot Dip Galvanising Process
This Webnote investigates the feasibility of using the Hot Dip Galvanising method to apply a protective zinc coating to a steel vessel. The process involves lowering the pre-heated vessel into a molten zinc bath, and withdrawing the vessel from the bath after a short period of immersion. The Strand7 API is used to facilitate the application of time-dependent loads that simulate the dipping process. The analysis aims to determine the thermally induced stress and resulting risk of developing cracks during the process.

1.3 MB
ST7-1.40.35.49 Modelling Bond Slip in Reinforced Concrete
Tensile stress is generated in steel reinforcing bars via shear stress at the interface between the concrete and reinforcement. This shear stress is referred to as bond stress. If the bond stress exceeds the local shear capacity at the interface, the bar may slip relative to the concrete. This Webnote examines the implementation of a nonlinear bond stress vs slip relationship in Strand7.

7.8 MB
ST7-1.40.70.17 Multi-Cylinder Engine Vibration Analysis
Vibration from multi-cylinder engines can be modelled in Strand7 by using the Harmonic Response solver. This Webnote is a continuation of ST7-1.40.70.16 Motorcycle Engine Vibration Analysis, which develops the basic loading from a single cylinder reciprocating engine. These methods are applied to a V8 engine to determine the response of the surrounding structure to the engine vibration.

0.9 MB
ST7-1.40.130.5 Acoustic Cavity Modes with Flexible Boundaries
The acoustic cavity modes described in ST7-1.40.130.1 Calculating and Analysing Acoustic Cavity Modes are calculated under the assumption that the walls of the cavity are rigid. For a cavity with very thin walls, it is possible to get a strong interaction between the wall vibrations and the acoustic resonance inside the cavity. This Webnote presents the analysis of an acoustic cavity, which is coupled to a flexible wall.

0.7 MB
ST7-1.50.50.6 Using String Groups
The Beam String Group attribute is used to model a continuous chain of truss type beam elements sliding through frictionless connections at nodes. The attribute ensures that a constant axial force develops in all the elements in the same string group. A common application of the attribute is to model massless cables (or strings) such as pulley systems, lifting sling cables, and pre-stressed steel tendons in reinforced concrete. This Webnote examines the Beam String Group attribute and its modelling applications.
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