A model for the cardiac muscle contraction process

Mesomechanical model and analysis of an artificial muscle functioning: role of Poisson’s ratio

“…Here, α max is the total number of cross-bridges in the undeformed state of the microelement; C is the factor to be determined by the results of actuation in isometric mode of the MTA. However, as was shown in [12,13], the dependence of the number of bridges α on the microelement length is a complex nonlinear relation. In the field of small elongations…”

“…The speed sensitivity of the ratio of transverse strain is neglected in equation (12). This assumption is deemed to be non-essential, and it is taken to illustrate the impact of this ratio on the parameters of the operation of the actuator.…”

“…which represents the maximum specific force (per unit crosssectional area) generated by the actuator. It follows from equation (12) that the regime of stationary (steady) reduction with constant speed is realized only in the case of negligible static (long) stiffness in axial compression. Therefore, we can assume Hu 0 z ¢ » in this example; however, H 0 rr0 e ¹ in this case.…”

“…In reality, the static stiffness of the twisted fibers is zero under compression in the axial direction, and practically coincides with the stiffness of the fiber material in the transverse direction. In view of the above, equation (12) for the stationary reduction mode can be rewritten as:…”