A method for measuring the random strength and defect probability of inorganic non-metallic fibers
An inorganic non-metallic, random strength technology, applied in computer-aided design, instrument, geometric CAD, etc., can solve the problems of measurement acquisition, limit the application of existing model engineering, etc., and achieve the effect of improving practicability
Active Publication Date: 2020-03-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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However, when using these models to calculate the fracture strength of fiber bundles, the critical failure percentage of fibers is required, but this parameter is difficult to obtain experimentally
This situation greatly limits the engineering application of existing models
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[0017] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The implementations are only some of the implementations of the present application, not all of them. Based on the implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0018] The embodiment of the present application provides a method for measuring the random strength and defect probability of inorganic non-metallic fibers, the method comprising:
[0019] S1: Pre-classify the defect types on the fiber, each defect type corresponds to the defect number and the breaking strength;...
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Abstract
The invention provides a method for determining stochastic intensity and defect probability of inorganic nonmetallic fibers. The method includes: pre-dividing fiber defect types corresponding to defect numbers and breaking strength; uniformly dividing each of a preset amount of fiber yarns being L in length into N delta 1 sections, and defining a first probability of a j type of defects of the fiber yarns being delta 1 in length, wherein the length of each fiber yarn section is delta 1; according to the defined first probability, defining a second probability of the j type of defects of the fiber yarns being L in length; calculating a third probability that strength of the fiber yarns being L in length is sigma j; calculating a numerical value of the second probability according to the third probability; calculating a numerical value of the first probability according to the numerical value of the second probability. By the method for determining stochastic intensity and defect probability of the inorganic nonmetallic fibers, practicality in determination of stochastic intensity and defect probability of the inorganic nonmetallic fibers can be improved.
Description
technical field [0001] The invention belongs to the field of static strength calculation of composite materials, in particular to a method for measuring the random strength and defect probability of inorganic non-metallic fibers. Background technique [0002] Inorganic non-metallic fibers (including various types of carbon fibers and ceramic fibers, etc.) have excellent high-temperature mechanical properties and are key materials for designing and manufacturing high-temperature structures. The reinforcing fiber is the main load-bearing unit in the composite material, and its strength value determines the strength value of the composite material. How to measure and calculate the strength value of fibers is a key issue in the design of composite structures. [0003] However, the strength value of inorganic non-metallic fibers is not only related to the material properties of the fibers themselves, but also closely related to the defects on the fibers. Since the size and dist...
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IPC IPC(8): G06F30/20G06F111/10G06F113/26G06F119/14
CPCG06F30/13
Inventor 高希光宋迎东张盛于国强董洪年
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS