一种高速冲击下泡沫及短切纤维增强的蜂窝夹芯包容机匣的吸能与包容特性分析方法

By establishing a high-speed impact finite element model of a honeycomb sandwich enclosure reinforced with foam and chopped fiber, and applying an improved damage criterion and ABAQUS software, the problem of accurately analyzing the containment characteristics of the honeycomb sandwich enclosure under high-speed impact in the prior art was solved, and its energy absorption and containment characteristics were accurately predicted.

CN116933438BActive Publication Date: 2026-07-17NORTHEASTERN UNIV CHINA +1
View PDF 3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEASTERN UNIV CHINA
Filing Date
2023-08-08
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies lack analysis of the containment and energy absorption characteristics of foam and chopped fiber reinforced honeycomb sandwich casings under high-speed impact, making it impossible to accurately predict their energy absorption and containment capabilities under high-speed impact loads, and they are not applicable to composite material casings.

Method used

A high-speed impact finite element model of a honeycomb sandwich enclosure containing foam and chopped fiber reinforcement was established. Improved Christensen, Hashin and BK damage criteria were applied, and the VUMAT subroutine was written in ABAQUS software to perform iterative calculations to predict damage modes, surface density energy absorption and projectile residual velocity.

Benefits of technology

Accurate prediction of the energy absorption and containment characteristics of foam and chopped fiber reinforced honeycomb sandwich containment casings under high-speed impact, considering the interlayer performance differences and strain rate effects, predicts structural damage modes and areal density energy absorption, thus improving the accuracy of containment capacity analysis under high-speed impact.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN116933438B_ABST
    Figure CN116933438B_ABST
Patent Text Reader

Abstract

本发明属于机械设计技术领域，具体涉及一种高速冲击下泡沫及短切纤维增强的蜂窝夹芯包容机匣的吸能与包容特性分析方法。本发明的技术方案如下：基于改进的Gibson理论、Halpin‑Tsai微观力学模型、MMTC等效弹性模量理论和改进的Christensen失效准则，考虑了泡沫及短切纤维增强的蜂窝夹芯的本构模型和冲击损伤模式，利用VUMAT子程序开发了增强蜂窝芯层的冲击损伤演化的计算程序，并基于ABAQUS软件建立了泡沫及短切纤维增强的蜂窝夹芯包容机匣圆柱壳的高速冲击有限元模型，预测了结构在高速弹体冲击作用下的损伤模式、面密度吸能和弹体剩余速度。本发明能够准确的预测泡沫及短切纤维增强的蜂窝夹芯包容机匣在高速冲击载荷下的吸能与包容特性。
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • A simulation method for large deformation and toughness failure of PC thin sheet under high-speed impact load

    CN108875209B

  • A method for analyzing the containment of casing with blade offset loss

    CN112541230B

  • Design method of STF-Kevlar fabric soft-wall containment casing based on shear rate matching

    CN114329759B