Spring-Dashpot Analogy for Mechanically Fastened Plastics

A Spring-Dashpot System for Modelling Lung Tumour Motion in Radiotherapy

A 3D system of springs and dashpots is presented to model the motion of a lung tumour during respiration. The main guiding factor in configuring the system is the spatial relationship between abdominal and lung tumour motion. A coupled, non-dimensional triple of ordinary differential equations models the tumour motion when driven by a 3D breathing signal. Asymptotic analysis is used to reduce t...

Finite Element - Based Strength Prediction for Notched and Mechanically Fastened Woven Fabric Composites

A literature review has been carried out relating to the damage and fracture behaviour of composite laminates based on woven fabric reinforcement containing a stress raiser in the form of either a circular hole or of a mechanically fastened joint – the tensile failure modes in these two types of problem are very similar. Closed form and finite element based approaches that enable the stress dis...

RC Beams Strengthened with Mechanically Fastened Composites: Experimental Results and Numerical Modeling

The use of mechanically-fastened fiber-reinforced polymer (MF-FRP) systems has recently emerged as a competitive solution for the flexural strengthening of reinforced concrete (RC) beams and slabs. An overview of the experimental research has proven the effectiveness and the potentiality of the MF-FRP technique which is particularly suitable for emergency repairs or when the speed of installati...

Modeling viscoelasticity through spring–dashpot models in intermittent-contact atomic force microscopy

We examine different approaches to model viscoelasticity within atomic force microscopy (AFM) simulation. Our study ranges from very simple linear spring-dashpot models to more sophisticated nonlinear systems that are able to reproduce fundamental properties of viscoelastic surfaces, including creep, stress relaxation and the presence of multiple relaxation times. Some of the models examined ha...

Mechanically stiffness-adjustable actuator using a leaf spring for safe physical human-robot interaction