A frame-invariant formulation of Fung elasticity

A Frame-Free Formulation of Elasticity

The term “principle of material frame-indifference” was introduced in 1965 by C. Truesdell and me in our contribution [NLFT] to the Encyclopedia of Physics. Earlier, I had used the term “principle of objectivity”, and some people use this term to this day. I meant “objectivity” to express independence of the “observer”, but Truesdell disliked the term as being too easily misinterpreted. In fact...

A New Mixed Formulation for Elasticity

In this paper we present a new mixed variational formulation for the problem of linear elastostatics. Our formulation is very similar to the classical HellingerReissner formulation, but appears superior for finite element discretization. To make plain the relation between the Hellinger-Reissner formulation and the present one, we consider first an elastic body occupying a region g? in Euclidean...

Frame-invariant proper-force

Here we try to find “the best joints for carving up” the phenomenon of accelerated-motion so as to obtain (i) the least need for extended-networks of synchronized-clocks as well as (ii) the greatest frame-independence. The acceleration four-vector’s invariant magnitude, and a number of other quantities from the traveler’s point of view, show promise for broadening student understanding (and per...

Integral Equations Formulation of Classical Elasticity

366 - 372 Fung SY.pmd

The protective effects of Mucuna pruriens seed extract (MPE) against the cardio-respiratory depressant and neuromuscular paralytic effects induced by injection of Calloselasma rhodostoma (Malayan pit viper) venom in anaesthetized rats were investigated. While MPE pretreatment did not reverse the inhibitory effect of the venom on the gastrocnemius muscle excitability, it significantly attenuated...