A numerical simulation method for fragments distribution of concrete subjected to blast loading

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2025-04-30 DOI:10.1016/j.engfailanal.2025.109606

Shuai Yang , Zengyou Liang , Xiangzhao Xu , Jianguo Ning

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引用次数: 0

Abstract

Concrete is widely employed in the construction of buildings and critical infrastructure, however, such structures are highly vulnerable to blast loads during their service. The concrete structures undergo fracture and fragmentation failure when subjected to blast loading, the resulting secondary concrete fragments possess substantial kinetic energy and destructive potential, capable of inflicting significant collateral damage to personnel and equipment within the affected area. This study focuses on high-energy secondary fragments generated under blast loading, a numerical investigation is conducted using the LS-DYNA simulation software, the high explosive model, air medium model, and concrete Karagozian&Case (KC) material model are integrated with the Arbitrary Lagrangian–Eulerian (ALE) method to simulate concrete fragmentation behavior under multiple blast scenarios. The fragmentation morphology is characterized for both lateral and top detonation, furthermore, a specialized analysis plugin is developed through secondary programming to complete the identification and data output for concrete fragments across various particle sizes. The effective extraction and quantitative statistics methods for fragmentation parameters information are proposed, moreover, the accuracy of the present numerical simulation method is verified with the comparative of the experimental and theoretical results. Parametric analysis are performed to investigate the influence of concrete strength grade and charge mass on fragmentation behavior, the quantitative distribution and percentage composition of secondary fragments are determined in different particle size ranges. The identification statistical program and fragmentation information extraction method developed in this study can solve the problems for quantitative prediction on concrete fragmentation behavior, which are meaningful for the damage assessment and mining engineering.

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爆炸荷载作用下混凝土破片分布的数值模拟方法

混凝土广泛应用于建筑物和关键基础设施的建设，然而，这些结构在使用过程中极易受到爆炸荷载的影响。混凝土结构在爆炸荷载作用下发生断裂和破碎破坏，产生的二次混凝土碎片具有巨大的动能和破坏潜力，能够对受影响区域内的人员和设备造成重大的附带伤害。针对爆炸荷载作用下产生的高能二次破片，采用LS-DYNA仿真软件进行数值研究，结合高爆模型、空气介质模型和混凝土karagozian&case （KC）材料模型，采用任意拉格朗日-欧拉（ALE）方法模拟多种爆炸工况下混凝土的破碎行为。此外，通过二次编程开发了专门的分析插件，以完成各种粒径混凝土碎片的识别和数据输出。提出了有效的破碎参数信息提取和定量统计方法，并通过实验与理论结果的对比验证了本文数值模拟方法的准确性。通过参数分析研究了混凝土强度等级和电荷质量对破碎行为的影响，确定了不同粒径范围内二次破片的数量分布和百分比组成。本研究开发的识别统计程序和破碎信息提取方法可以解决混凝土破碎行为的定量预测问题，对损伤评估和采矿工程具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.