Response to Dr. K. Miller (Re: Most recent results in the biornechanics of the brain).
Wu-JZ; Dong-RG; Schopper-AW
J Biomech 2005 Apr; 38(4):969
We would like to thank Dr. Miller for his comments on our work. There was a typo in Fig. 7a. The unit of the vertical axis should be ''Pa''. In our study, a six-term (N = 6) Ogden's form was used to fit the experimental data (Miller and Chinzei, 1997). The elastic material parameters were obtained by fitting the model to equilibrium stress/strain relationship. The equilibrium stress/strain relationship obtained using the six-term Ogden-type model (Wu et al., 2004) agrees well with that obtained using the one-term model by Miller and Chinzei (2002). The magnitudes of the material parameters in these two models are not comparable, because one is expressed in a series form while the other has a single, integral form. It is seen from our analysis that the Ogden-type model fits well to the experimental data (Wu et al., 2004, Fig. 7a). The purpose of our study was, however, not to test if Ogden's form could fit to experimental data, but to demonstrate the effect of friction on the stress response in soft-tissue tests. The choice of the constitutive model in the analysis has no impact on the conclusion obtained in the study.
Mathematical-models; Analytical-Method; Analytical-methods; Analytical-processes; Statistical-analysis; Models
JZ Wu, NIOSH, 1095 Willowdale Rd, Morgantown, WV 26505
Journal of Biomechanics