Knee of the curve in accordance with the design of tubular beam kit can provide protective effects of restraint, restraint stress produced by ligaments to help share the load.
依膝部曲线设计的筒状束套，能提供束缚防护效果，束缚产生的压力能协助分担关节韧带的负荷。
2
The effects of flaw, connection, flange and form of knee on fatigue strength of beam brackets are discussed.