To determine which preconditioning and pretensioning techniques should be applied to soft tissue grafts during anterior cruciate ligament (ACL) reconstruction to avoid loss of tension after surgery, fresh semitendinosus and tibialis anterior tendons underwent tensile mechanical testing with 4 pretensioning and/or preconditioning techniques. A mechanical tester was used to collect the data. Grou...

Entirely grouted cable tendons are commonly used in mining engineering. They have superior working ability reinforcing the excavated rocks and soils. During process of tendons, force-transferring corresponding mechanism significant guaranteeing safety underground openings. To further understand entirely this paper provided a literature review on force transfer tendons. First, concept was summar...

Post-tensioning structures with metallic ducts risk corrosion, rupture or collapses due to chloride ingress. The use of tight corrugated polymer combined electrically isolated anchorages (EIT) changed the situation. Laboratory and many field applications proved tightness duct, showing resistance values higher much than 50 kΩm, acceptance criteria for a duct. most important fact is that EIT tend...

Abstract At present, there is a problem of too much prestress loss in the construction multi-layer logistics warehouses China. To meet quality requirements project, this paper puts forward research on technology pretension prestressed reinforced concrete structure warehouse. The process can be effectively controlled by incorporating pre-tensioning into process, placing tendons, and tensioning o...

The general principles behind the global mechanical tensioning technique for controlling weld residual stresses are examined using a finite lement model to follow their evolution throughout the welding process. While we focus specifically on friction stir welding, the tool is represented imply as a heat source. As a result, the findings have relevance to a wide range of welding processes. For a...

Over the past two decades, precast concrete members have been utilized in seismically resilient structures. In developing these structures, different techniques used for connecting to foundation. building construction, unbonded post-tensioning (PT) tendons can anchor a wall foundation, resulting so-called rocking system. The system develops dry connection with foundation and provides moment res...

Conventionally, tendon-driven manipulators implement some force control scheme based on tension feedback. This feedback allows the system to ensure that the tendons are maintained taut with proper levels of tensioning at all times. Occasionally, whether it is due to the lack of tension feedback or the inability to implement sufficiently high stiffnesses, a position control scheme is needed. Thi...

Abstract Post-tensioned precast concrete walls are an attractive research trend in structural engineering, which replaces cast-in-place earthquake-prone buildings. Precast use mild steel and high-strength post-tensioning for flexural resistance. Mild reinforcement yields tension compression, dissipating inelastic energy. Unbounded tendons used inside the wall to give self-centering capability, ...