抄録
The final goal of this study is to produce safety structures for human friendly robots. This paper describes an experimental study on collapse and reversible behaviors of the specimens of polycarbonate circular pipe that are repeated by round-shaped indenter at the midspan with low load cycles. From the experimental results, the load-displacement histeresis patterns has a wide loop, namely high energy-absorbing ratio. The collapse load of repeating and the energy-absorbing capability reduce with the number of load cycles and their degree depends on the maximum displacement of the cycle.
