Question

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In order to carry out the straightening experiment at room
temperature, commercial aluminum pipe, JIS A 1100-TD,
with the initial outer diameter of 35 mm, wall thickness of
1mm and length of 500mm was used. The outer diameter
and the wall thickness of aluminum pipe used in the experiment
were selected as about 1/10 size of the actual largediameter
seamless pipe whose curved shape near both ends
causes trouble in industry. Assuming the Swift-type stress–
strain relationship for this material, the flow stress in the uniaxial
tension was given by σ = 141(0.002 + εp)0.0329 MPa.
Before the straightening experiment, pipe specimen was
so bent as to give a curved shape by three-point bending.
We designate the position where the pipe specimen is bent
along the axial direction as the bend location lb. While the
bend location located at the position of lb = 250mm from
the end of pipe specimen in the previous experiment [5],
the bend locations were selected at lb = 50, 75, 100, 150
and 200mm from the end of pipe specimen in the present
experiment.

Answer 1

为了进行矫直实验在房间
温度、商业铝管、JIS 1100 - td,
最初的35毫米外径,壁厚
1毫米和500毫米的长度。外直径
和壁厚的铝管用于实验
被选为1/10实际大直径的大小
无缝钢管的两端附近的弯曲形状
在工业造成不必要的麻烦。假设Swift-type压力-
这种材料的应变关系,在单轴应力
张力是由σ= 141(0.002 +εp)0.0329 MPa。
在矫直实验之前,管标本
弯曲,弯曲的形状由三点弯曲。
我们指定的位置弯曲管标本
沿轴向方向的位置磅。而弯曲
弯曲的位置位于磅= 250毫米的位置
年底管标本在前面实验[5],
弯曲的位置选择在磅= 50,75,100,100
年底和200毫米管标本在当下
实验。