Mechanical Performance and Parameter Sensitivity Analysis of 3D Braided Composites Joints

Table 4

Joint parameters and the parameters values.

Parameter name	Parameter value
Load parameter
𝑛	−0.9	−0.8	0	0.8	0.9
Geometric parameters
𝜏	0.6	0.7	0.8	0.9	1
𝛾	20	30	40	50	—
𝛽	0.35	0.4	0.45	0.5	0.55
𝜃	30	35	40	45	50
𝑑	40	60	80	100	120
Process parameters
𝑉𝑓	35	45	55	65	—
𝛼	5	15	25	35	45, 55

𝑛: The ratio of pipe force and material strength.
𝛾: The ratio of main pipe diameter and thickness.
𝛽: The ratio of main pipe diameter and branch pipe diameter.
𝜃: Branch pipe axis and main pipe axis angle (°).
𝜏: The ratio of main pipe wall thickness and branch pipe wall thickness.
𝛼: Fiber braiding angle (°).
𝑉_𝑓: Fiber volume content (%).
𝑑: The main pipe diameter (mm).