International Journal of Impact Engineering最新文献_第5页

Mechanism analysis for scaling effect on the impact behaviors of RC beam: From material properties to component response 钢筋混凝土梁冲击行为的比例效应机理分析：从材料特性到部件响应

IF 5.1 2区工程技术

International Journal of Impact Engineering Pub Date : 2024-09-01 DOI: 10.1016/j.ijimpeng.2024.105105

{"title":"Mechanism analysis for scaling effect on the impact behaviors of RC beam: From material properties to component response","authors":"","doi":"10.1016/j.ijimpeng.2024.105105","DOIUrl":"10.1016/j.ijimpeng.2024.105105","url":null,"abstract":"<div><p>Scaling effects on the resistance response of RC components have been found under impact, penetration, and blast. To investigate the mechanism and origins of the scaling effect on the impact response of RC beams, numerical models of geometrically similar beams were established on the ABAQUS platform by considering the strain rate effect. The influence of material properties such as elasticity, plasticity, and strain rate effect on the similarity of beam impact response was accessed and analyzed. Then, the scaling effects of impact characteristics such as time history, damage, effective mass, and span length of RC beams were discussed and compared from the local and global stages. The numerical findings revealed that material properties influence the scaling effect on the impact response and strain rate distribution. The inhomogeneity of strain rate distribution and the difference in dynamic strength caused by the non-uniform scaling for the strain rate effects (DIFs) contribute to the scaling effect. In addition, the two-stage analysis results indicated that the scaling effects exhibited in the local and global responses of RC beams are not entirely consistent. As the scale factor increases, for the large-sized beams, the normalized deformation profile shrinks, the equivalent mass factor decreases, the effective span length changes slower, and the moving velocity of the plastic hinge slows down. Several impact performance characteristics, such as strain rate distribution within the beam and the damage and deformation curve of the beam, will reflect localization as the scale factor increases. It is expected that the preliminary mechanism analysis of this study could provide a reference for analyzing the impact response of prototype beams.</p></div>","PeriodicalId":50318,"journal":{"name":"International Journal of Impact Engineering","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0734743X24002306/pdfft?md5=554bc152db85e88822de7727a7f2f1b3&pid=1-s2.0-S0734743X24002306-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142163483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical model for penetration process of a deformable projectile into ductile metallic target plate considering the interaction of projectile and target 考虑到射弹和目标相互作用的可变形射弹穿透韧性金属靶板过程的数值模型

IF 5.1 2区工程技术

International Journal of Impact Engineering Pub Date : 2024-09-01 DOI: 10.1016/j.ijimpeng.2024.105107

{"title":"Numerical model for penetration process of a deformable projectile into ductile metallic target plate considering the interaction of projectile and target","authors":"","doi":"10.1016/j.ijimpeng.2024.105107","DOIUrl":"10.1016/j.ijimpeng.2024.105107","url":null,"abstract":"<div><p>The interaction of projectile and target in a penetration process is key for precise prediction and safety design. However, this interaction is instantaneous and varying with complex physical phenomena, that induces a challenge of panoramically illustrating the penetration process. This work develops a new numerical model that can capture the penetration process of a deformable projectile impacting ductile target plate and meanwhile the interaction of projectile and target is considered. Here, physical mechanisms are explored and accordingly mathematical derivations for theoretical analysis are carried out. The issues of plastic stress wave, contact stress, shear perforation and energy dissipation are involved. Both the deformation of projectile and failure of target plate are addressed which include the upsetting deformation of projectile, pit-opening performance of target plate and perforation of target plate. This model presents the history of the deformation of projectile and target, velocity evolution, penetration resistance and shear perforation with timing. The modelling results show a high-precision prediction by comparing with experimental data of a flat-ended projectile penetrating Weldox 460E steel target plate [<span><span>54</span></span>] and other developed models of plugging failure model [<span><span>13</span></span>] and plastic wave model [<span><span>48</span></span>] for both cases of 16mm- and 20 mm-thickness target plates. This work offers the comprehensive calculation and analysis of penetration process and reveals the insights of the transient phenomena for impact engineering.</p></div>","PeriodicalId":50318,"journal":{"name":"International Journal of Impact Engineering","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0734743X2400232X/pdfft?md5=d8a0e97f9ad3e6189108a07d9451e990&pid=1-s2.0-S0734743X2400232X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142163485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An analytical model for the penetration of flat-nosed long rods into semi-infinite concrete targets 平头长杆穿入半无限混凝土目标的分析模型

IF 5.1 2区工程技术

International Journal of Impact Engineering Pub Date : 2024-08-30 DOI: 10.1016/j.ijimpeng.2024.105100

{"title":"An analytical model for the penetration of flat-nosed long rods into semi-infinite concrete targets","authors":"","doi":"10.1016/j.ijimpeng.2024.105100","DOIUrl":"10.1016/j.ijimpeng.2024.105100","url":null,"abstract":"<div><p>An analytical model is presented herein on the penetration of a flat-nosed long rod into a semi-infinite concrete target based on the previous theoretical studies and experimental observations. The nose shape of the flat-nosed long rod in deformable penetration state is assumed to be a circular arc and the length of plastic region of the long rod in hydrodynamic penetration is taken into account. The behavior of an erosive penetrator is further divided into two penetration stages (namely semi-hydrodynamic penetration and hydrodynamic penetration) and a new critical impact velocity (i.e. erosive velocity) is derived to characterize the beginning/incipient erosion in accordance with plastic wave propagation theory. According to the new theoretical considerations, the relationship of dimensionless instantaneous mushrooming head radius versus impact velocity is rewritten and the method for predicting semi-hydrodynamic penetration tunnel radius is proposed. It transpires that the present model predictions are in good agreement with available experimental results for the penetration of flat-nosed long rods into semi-infinite concrete targets in terms of penetration depth, penetration modes, penetration tunnel size, residual mass and residual length.</p></div>","PeriodicalId":50318,"journal":{"name":"International Journal of Impact Engineering","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0734743X24002252/pdfft?md5=a1fc1b703fa57cc97c9c4cb0f4d511f0&pid=1-s2.0-S0734743X24002252-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142163484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of low-velocity impact mechanical response and damage in thermoplastic composites considering elastoplastic behavior 考虑弹塑性行为的热塑性复合材料低速冲击机械响应和损伤预测

IF 5.1 2区工程技术

International Journal of Impact Engineering Pub Date : 2024-08-26 DOI: 10.1016/j.ijimpeng.2024.105099

{"title":"Prediction of low-velocity impact mechanical response and damage in thermoplastic composites considering elastoplastic behavior","authors":"","doi":"10.1016/j.ijimpeng.2024.105099","DOIUrl":"10.1016/j.ijimpeng.2024.105099","url":null,"abstract":"<div><p>By incorporating the plastic deformation and Puck damage criteria law, a three-dimensional elastic-plastic-damage model has been established to predict the behavior of carbon fiber reinforced thermoplastic (CFRTP) composites under low-velocity impacts. The model has been integrated into ABAQUS/Explicit, and off-axis tensile test were conducted to ascertain appropriate parameters for the elastic-plastic model. Additionally, finite element modeling of off-axis tensile were employed to assess the precision of the model parameters and to contrast the variance of accounting for plastic deformation against neglecting it. The effectiveness of the elastic-plastic-damage model, incorporating damage considerations, was confirmed through an analysis of the mechanical response and progressive damage of CFRTP during low-velocity impact tests. Compared to the elastic-damage model that does not consider plastic deformation, the elastic-plastic-damage model, which takes plastic deformation into account, exhibits higher prediction accuracy. Both simulation and experimental results indicate that delamination and matrix cracking are the dominant damage patterns observed in CFRTP at relatively low impact energies (≤16.20 J).</p></div>","PeriodicalId":50318,"journal":{"name":"International Journal of Impact Engineering","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A digital-twin driven Split Hopkinson bar layout for the tensile characterization of thin, low impedance, sheet-like materials 用于表征薄型低阻抗片状材料拉伸特性的数字双驱动分体式霍普金森棒布局

IF 5.1 2区工程技术

International Journal of Impact Engineering Pub Date : 2024-08-25 DOI: 10.1016/j.ijimpeng.2024.105098

{"title":"A digital-twin driven Split Hopkinson bar layout for the tensile characterization of thin, low impedance, sheet-like materials","authors":"","doi":"10.1016/j.ijimpeng.2024.105098","DOIUrl":"10.1016/j.ijimpeng.2024.105098","url":null,"abstract":"<div><p>The Split Hopkinson or Kolsky bar is one of the most popular devices when it comes to the mechanical characterization of material samples under high strain-rates. While testing of high impedance materials, such as metal alloys, is relatively straight forward, samples with low impedance pose certain challenges. The present work focuses on the detailed implementation of a high strain-rate tensile testing method for thin, low impedance, sheet-like materials by using the Split Hopkinson test principle. In order to find a suitable Split Hopkinson setup a digital twin was created using explicit finite element methods. With the help of the digital twin, the design of the transmission bar and the sample holders including the friction liners were explored. The numerical model indicated, that a hollow transmission bar with a moderate tapering (hollow bar 1.0) is suited for the characterization of low impedance materials over a wide strain-rate range. Furthermore, this setup has to be combined with an asymmetrical sample holder configuration (heavier on the incident side and lighter on the transmission side) and aluminum friction liners to return accurate results. This numerically derived setup was validated against experimental tests on paper, representative of low impedance, sheet-like materials.</p></div>","PeriodicalId":50318,"journal":{"name":"International Journal of Impact Engineering","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0734743X24002239/pdfft?md5=d5f481ea276ccb313021b447403f0c31&pid=1-s2.0-S0734743X24002239-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “Crashworthiness in preliminary design: mean crushing force prediction for closed-section thin-walled metallic structures” [International Journal of Impact Engineering, Volume 188, June 2024, 104946] 初步设计中的耐撞性：闭合截面薄壁金属结构的平均挤压力预测"[《国际冲击工程学报》，第 188 卷，2024 年 6 月，104946] 更正

IF 5.1 2区工程技术

International Journal of Impact Engineering Pub Date : 2024-08-23 DOI: 10.1016/j.ijimpeng.2024.105086

引用次数: 0

A numerical and experimental approach to blast protection with fluids, effect of impulse spreading 用流体进行爆炸防护的数值和实验方法，脉冲扩散的影响

IF 5.1 2区工程技术

International Journal of Impact Engineering Pub Date : 2024-08-22 DOI: 10.1016/j.ijimpeng.2024.105094

{"title":"A numerical and experimental approach to blast protection with fluids, effect of impulse spreading","authors":"","doi":"10.1016/j.ijimpeng.2024.105094","DOIUrl":"10.1016/j.ijimpeng.2024.105094","url":null,"abstract":"<div><p>In the face of rapidly evolving challenges, new protection techniques against blast waves generated by high explosive detonations must be identified. The protection of vehicle floors is particularly relevant, especially against improvised explosive devices (IED), as these are challenging to detect. In this paper, investigations on fluid-filled sacrificial claddings are presented. Classical sacrificial claddings aim at limiting the deflection of the target by dissipating the blast wave energy through the core plastic or brittle deformation. On the contrary, fluid-filled sacrificial claddings are systems which aim at limiting the deflection of the target by extracting energy from the system and modifying the load distribution on the target. A new experimental set-up, designed for this investigation, is presented. Based on pressure signals, high speed-imaging and numerical simulations on LS-DYNA, it is shown that the ability to extract energy from the system is directly linked to the freedom of displacement of the fluid. It is also shown that at the same time, higher fluid displacement and well-designed boundary conditions lead to higher impulse spreading on the target.</p></div>","PeriodicalId":50318,"journal":{"name":"International Journal of Impact Engineering","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142086937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental characterization of material strain-rate dependence based on full-field Data-Driven Identification 基于全场数据驱动识别的材料应变速率相关性实验表征

IF 5.1 2区工程技术

International Journal of Impact Engineering Pub Date : 2024-08-22 DOI: 10.1016/j.ijimpeng.2024.105083

{"title":"Experimental characterization of material strain-rate dependence based on full-field Data-Driven Identification","authors":"","doi":"10.1016/j.ijimpeng.2024.105083","DOIUrl":"10.1016/j.ijimpeng.2024.105083","url":null,"abstract":"<div><p>Mechanical characterization usually relies on standardized sample geometries where homogeneous state of strain and stress are prescribed. Hence, many tests are required to capture the material response over various loading conditions. Using complex geometry allows for exploring wider domain in a single test but would require to have access to local strains and stresses to feed models. In that context, digital image correlation and clustering technique can be used to formulate an inverse problem able to identify fields of stress tensors without <em>a priori</em> constitutive modelling. This study explores the performances of a rate-dependent formulation of such a data-driven stress identification method, for capturing using a single test, the monotonic high strain-rate dependent response of a mild steel alloy. After presenting the problem formulation and resolution framework, a digital twin of a high speed tensile test performed on a notched sample geometry is used to explore identification performances. It allows defining confidence intervals depending on multiple indicators (stress magnitude, multiaxiality) and evaluate the range of strain-rate levels simultaneously captured. The method is eventually applied to a real experiment instrumented with high spatial resolution ultra high speed camera. Stress tensor fields are identified, within a 10 <span><math><mtext>%</mtext></math></span> confidence over the major part of the sample, and its material rate-dependence is retrieved from 20 to 300 s<sup>−1</sup> and found in very good agreement with literature. This is the first experimental application of the DDI in a high strain-rate context. The proposed framework may substantially widen the sample design space for mechanical characterization but also allow for probing local stresses during dynamic localization processes where in-situ quantitative data are still missing.</p></div>","PeriodicalId":50318,"journal":{"name":"International Journal of Impact Engineering","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142086938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact resistance and energy absorption characteristics of nickel-based alloy ring at elevated temperatures 镍基合金环在高温下的抗冲击性和能量吸收特性

IF 5.1 2区工程技术

International Journal of Impact Engineering Pub Date : 2024-08-21 DOI: 10.1016/j.ijimpeng.2024.105089

引用次数: 0

Constitutive and impact response of AA7475-T7351 under different projectile shapes and velocities: An experimental and numerical investigation 不同射弹形状和速度下 AA7475-T7351 的构造和冲击响应：实验和数值研究

IF 5.1 2区工程技术

International Journal of Impact Engineering Pub Date : 2024-08-21 DOI: 10.1016/j.ijimpeng.2024.105095

{"title":"Constitutive and impact response of AA7475-T7351 under different projectile shapes and velocities: An experimental and numerical investigation","authors":"","doi":"10.1016/j.ijimpeng.2024.105095","DOIUrl":"10.1016/j.ijimpeng.2024.105095","url":null,"abstract":"<div><p>Through experimental and numerical investigation, this article investigates the constitutive and impact response of the 1.6 mm thick AA7474-T7351 plate under the impact of blunt and hemispherical-nosed projectiles at different velocities. The Johnson-Cook plasticity and failure model parameters were calibrated for the target material using experimental data from the tensile experiments, which took into consideration the effects of plastic strain, strain rate, temperature and stress triaxiality. Further, JC plasticity model parameters were also optimised using a parametric optimisation process. The flow stress of AA7475-T7351 shows positive and negative sensitivity toward loading rate and temperature. It is observed that the ductility of AA7475-T7351 decreases with increases in stress triaxiality, whereas the flow stress increases. Perforation experiments on 1.6 mm thick circular AA7475-T7351 plates were carried out using a single-stage gas gun along with the high-speed Digital Image Correlation (3D-DIC) technique. The blunt nose projectile causes shear failure, whereas hemispherical nose projectile causes combined tension-shear failure; a microscopic study is performed to confirm this phenomenon. Experimental results obtained from DIC were validated using the numerical analysis in the Abaqus/Explicit platform in terms of transient out-of-plane deformation of the target plate. The quantitative error between experimental and numerical analysis was evaluated using the Russell error technique. Numerical analysis revealed that constitutive relations could predict the physical fracture mechanisms during perforation qualitatively as well as quantitatively.</p></div>","PeriodicalId":50318,"journal":{"name":"International Journal of Impact Engineering","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0