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A nail load distribution determination method for composite bolted connection structures considering clearance and tightening torque

A technology of tightening torque and nail load distribution, used in special data processing applications, instruments, electrical digital data processing, etc.

Inactive Publication Date: 2016-06-01
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The test proves that there is a linear relationship between the load on the load sensor and the measured strain under no tightening torque, but whether the above relationship changes when the gap is different and the influence of the above relationship after the tightening torque is still to be studied

Method used

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  • A nail load distribution determination method for composite bolted connection structures considering clearance and tightening torque
  • A nail load distribution determination method for composite bolted connection structures considering clearance and tightening torque
  • A nail load distribution determination method for composite bolted connection structures considering clearance and tightening torque

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Experimental program
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Effect test

Embodiment Construction

[0071] like figure 1 Shown, the concrete realization of the inventive method is:

[0072] 1. First establish the bolt stiffness model considering the gap and tightening torque,

[0073] In the static friction section, the range of bolt deformation δ is:

[0074] δ ≤ D n n ( 1 + D m m ) [ K 3 + A c c + ( C n n ) C nn ] ...

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Abstract

The invention relates to a composite bolt connection structure pin load distribution determination method in consideration of intervals and tightening torque. The method includes the following steps that firstly, a bolt rigidity model in consideration of the intervals and the tightening torque is built; secondly, a structural deformation-pin load relation at the positions of bolts when the intervals and the tightening torque exist is experimentally studied through an ASTM standard mesopore displacement measuring method, and then parameters of the bolt rigidity model are acquired; thirdly, a pin load distribution determination formula in a recursion mode is built according to the bolt rigidity model; fourthly, a pin load distribution rule when the intervals and the tightening torque exist is calculated according to a univariate iterative bisection method. The method is suitable for pin load distribution analysis of a composite bolt connection structure, the influences of the intervals and the tightening torque are taken into consideration, and the pin load distribution problem of the bolt connection structure can be accurately predicted and studied.

Description

technical field [0001] The invention relates to the determination of nail load distribution of a composite material bolt connection structure, and is suitable for composite material bolt connection structures widely used in aerospace vehicles. Background technique [0002] The nail load distribution analysis method is the key to the strength analysis of composite multi-nail connections, and it is also the premise of the strength analysis of multi-nail connections. At present, the methods commonly used to determine the nail load distribution of composite mechanical connections mainly include analytical method, finite element method and stiffness method. The analytical method for determining the nail load distribution of the composite bolted connection structure is developed based on the stress analysis of the hole edge of the composite orifice plate by Lekhnitskii et al. Since the determination of the nail load distribution is much more complicated than the determination of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 张建宇刘丰睿路绪恒赵丽滨
Owner BEIHANG UNIV
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