نتایج جستجو برای: torsional stiffness
تعداد نتایج: 49024 فیلتر نتایج به سال:
Serving to improve stability and energy efficiency during locomotion, in nature, animals modulate their leg stiffness to adapt to their terrain. Now incorporated into many locomotive robot designs, such compliance control can enable disturbance rejection and improved transition between changing ground conditions. This paper presents a novel design of a variable stiffness leg utilizing a magneto...
Introduction: Fluoride has been advocated for the treatment of osteoporosis because of its anabolic effect on osteoblasts. Fluoride can also alter bone mineral structure, and several investigators have inferred that the alteration in bone mineral causes a reduction in bone tissue strength that can negate the positive effects of increased formation [1-3]. However, the direct effects of fluoride-...
Balance shafts are often used to improve the engine vibration characteristics of three-cylinder engines. The balance damping gear with a ring is an important part connecting crankshaft and shaft transmission. stiffness unbalance have influence on its suppression performance, but coupled unbalanced unknown. In this paper, multi-body dynamic bending–torsional coupling model transmission system co...
Reaming debris is formed when bone defects are stabilized with an intramedullary nail, and contains viable osteoblast-like cells and growth factors, and might thus act as a natural osteoinductive scaffold. The advantage of using reaming debris over stem cells or autologous bone for healing bone defects is that no extra surgery is needed to obtain the material. To assess the clinical feasibility...
We present an active, purely mechanical stress wave isolator that consists of short cylindrical particles arranged in a helical architecture. This phononic structure allows us to change inter-particle stiffness dynamically by controlling the contact angles of the cylinders. We use torsional travelling waves to control the contact angles, thereby imposing a desired spatio-temporal stiffness vari...
In mechanical system modeling, uncertainties are present and, to improve the predictability of the models, they should be taken into account. This work discusses uncertainties present in boundary conditions using the model of a vibrating Timoshenko beam, free in one end and pinned with rotation constrained by a linear elastic torsional spring in the other end. The Finite Element Method is used ...
BACKGROUND AND PURPOSE Zoledronic acid (ZOL) has been shown in vitro and in vivo to inhibit osteoclastic activity and to regulate osteoblasts. Its antiresorptive effect is used clinically in the treatment of bone-consuming pathologies to prevent skeletal complications. Because of its effect on bone cells, there might be a possible benefit in treatment of fractures by local application from a bi...
The 2 nanomotors of rotary ATP synthase, ionmotive F(O) and chemically active F(1), are mechanically coupled by a central rotor and an eccentric bearing. Both motors rotate, with 3 steps in F(1) and 10-15 in F(O). Simulation by statistical mechanics has revealed that an elastic power transmission is required for a high rate of coupled turnover. Here, we investigate the distribution in the F(O)F...
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