The design of upholstered sofa frames to meet the General Service Administration (GSA) performance test regimen requires that analytical method and design loads be available. A simplified analysis method using beam models to analyze and calculate bending moments of critical structural members in a three-dimensional sofa frame was explored. The GSA performance test regimen load schedules were ap...

in this research, softening and ratcheting behaviors of ck20 alloy steel cylindrical shells were studied under displacement-control and force-control cyclic axial loading and the behavior of hysteresis curves of specimens was also investigated. experimental tests were performed by a servo-hydraulic instron 8802 machine. the mechanical properties of specimens were determined according to astm e8...

Postural destabilizations in response to cyclic pull-and-push arm movements were compared in young and elderly subjects, with the goal of determining how age-related differences in postural stability influence strategies of cyclic arm movements made at different speeds, against different loads and while standing on support surfaces of different compliances. The results show that elderly subject...

The behavior of the web panel zone has a direct effect on cyclic performance steel moment connections. While mechanisms failure are known under load, little is about bidirectional loads in bolted Using experimental tests and calibrated numerical models, this research evaluated unidirectional loads. results showed that load can modify stress strain distribution zone. Moreover, increasing width-t...

The anchor pile is widely used in marine aquaculture, and its uplift resistance capacity determines the safety performance of aquaculture structure. Cyclic loads such as wind, waves, currents environment affect piles. By carrying out a cyclic loading model test piles for influence amplitude, initial tension angle, other factors on was investigated. experimental results showed that with an incre...

Although fatigue damage in bone induced by cyclic loading has been recognized as a problem of clinical significance, few fracture mechanics based studies have investigated how incipient cracks grow by fatigue in this material. In the present study, in vitro cyclic fatigue experiments were performed in order to quantify fatigue-crack growth behavior in human cortical bone. Crack-growth rates spa...

A posture and load sampling approach to measure physical exposures was implemented within a case-control study of low-back pain reporting. The purpose of this paper was to determine how well this method was able to identify known low-back pain risk factors. Subjects, including both cyclic production and non-cyclic support workers, were studied while working in an automotive assembly facility. T...

In the process of roadway excavation, rock mass around is often subjected to cyclic loads, and mechanical properties strain energy evolution under loads are obviously different from those compression, so it urgent carry out research on loads. This study aims investigate residual in rocks uniaxial loading-unloading experiments (UCLUE). Four types rocks, namely coal, white sandstone, red granite,...