scholarly journals Research on Strain Rate-Dependent Tsai-Hill Strength Criterion for Ethylene Propylene Diene Monomer Film

2015 ◽  
Vol 9 (1) ◽  
pp. 102-106
Author(s):  
Xu Jinsheng ◽  
Yu Jiaquan ◽  
Chen Xiong ◽  
Niu Ranming ◽  
Jia Deng
Keyword(s):  
Engineering Application ◽  
Single Layer ◽  
Strength Criterion ◽  
Insulation Material ◽  
Rate Dependency ◽  
Solid Rocket Motor ◽  
Rate Dependent ◽  
Hill Criterion ◽  
Special Factor ◽  
Solid Rocket

EPDM film is an innovative insulation material used in the Solid Rocket Motor. İt is a kind of unidirectional single layer fiber-reinforced composite plate. To analyze its mechanical behavior uniaxial tests with different loading directions and rates were performed. The test results indicated that the EPDM film is anisotropic and its mechanical properties are obviously rate-dependent. To create a rate-dependent anisotropic strength criterion, two methods were adopted to extend the Tsai-Hill strength criterion; the first was to substitute all the strength components in the Tsai-Hill criterion with the fitted rate-dependent ones, the second was to introduce a special factor named the rate-dependency factor R(ε) into the criterion. The second method is simpler in form and more suitable for an engineering application. The two rate-dependent criteria were examined by comparing the predicted results with the experimental ones, and the results showed good agreement which verified that the strength criteria were able to reveal the anisotropic rate-dependent properties of the EPDM film.

Numerical Analysis and Test Research on Work Process of PSD in Pulse Solid Rocket Motor

2012 ◽  
Vol 490-495 ◽  
pp. 2290-2294
Author(s):  
Wei Ping Tian ◽  
Chun Guang Wang ◽  
Cong Chen ◽  
De Min Yang
Keyword(s):  
Numerical Analysis ◽  
Engineering Application ◽  
Rocket Motor ◽  
Test Method ◽  
Solid Rocket Motor ◽  
Work Process ◽  
Separation Device ◽  
Pulse Separation ◽  
Design Requirements ◽  
Solid Rocket

To achieve engineering application of pulse motor as soon as possible,designed a soft pulse separation device(PSD), numerical simulated its process of bearing pressure and turning on,used the XFEM to simulate its failure form,got strain and stress distribution,found the bearing capability and failure form of the structure of soft PSD was reliable;Designed a few of verification monomial tests,verified the accuracy of simulation,proved that its bearing capability and failure form satisfied with design requirements,could be applied to pulse motor.The simulation technique,test method and conclusion are useful for designing pulse solid rocket motor configuration.

Numerical Simulation of Insulation Layer Ablation in Solid Rocket Motor Based on Fluent

2014 ◽  
Vol 574 ◽  
pp. 224-229
Author(s):  
Jian Li ◽  
Mei Zhang ◽  
Jiang Tao Zhang
Keyword(s):  
Particle Deposition ◽  
Erosion Rate ◽  
Burning Surface ◽  
Rocket Motor ◽  
Insulation Material ◽  
Insulation Layer ◽  
Solid Rocket Motor ◽  
High Erosion Rate ◽  
Discrete Phase ◽  
Solid Rocket

A two-dimensional axisymmetric model was constructed to predict the ablation of the insulation layer in an end burning rocket motor by using the Computational Fluid Dynamics (CFD) software Fluent. The insulation material of graphite was used in the model. The wall surface reactions and discrete phase erosion were applied to simulate the insulation layer ablation. The influence of the burning surface movement was analyzed by using the dynamic mesh method. Numerical results show that the erosion rate increase with the increasing of burning time. The maximum erosion rate occurs at the upstream of the nozzle throat. There has a high erosion rate closing to the burning surface, and it decreases gradually away from the burning surface and becomes zero near the nozzle. It’s found that solid particle deposition appears on the inner surface of combustor closing to the nozzle, and it increases with the increasing of time.

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