Strain最新文献 - Book学术

Extracting fracture properties from digital image and volume correlation displacement data: A review 从数字图像和体积相关位移数据中提取断裂特性：综述

IF 2.1 3区材料科学

Strain Pub Date : 2023-11-27 DOI: 10.1111/str.12469

T. H. Becker

引用次数: 0

Experimental and numerical analysis of strength and deformation of large‐scale steel‐composite adhesive joints subjected to fatigue followed by static loading 大型钢-复合材料粘接接头在静载疲劳作用下的强度和变形试验与数值分析

3区材料科学

Strain Pub Date : 2023-11-02 DOI: 10.1111/str.12468

Pankaj R. Jaiswal, Rahul Iyer Kumar, Franz Bormann, Thibault Juwet, Geert Luyckx, Luc Mouton, Cedric Verhaeghe, Wim De Waele

{"title":"Experimental and numerical analysis of strength and deformation of large‐scale steel‐composite adhesive joints subjected to fatigue followed by static loading","authors":"Pankaj R. Jaiswal, Rahul Iyer Kumar, Franz Bormann, Thibault Juwet, Geert Luyckx, Luc Mouton, Cedric Verhaeghe, Wim De Waele","doi":"10.1111/str.12468","DOIUrl":"https://doi.org/10.1111/str.12468","url":null,"abstract":"Abstract This work reports a study of the fatigue behaviour and quasi‐static strength of full‐scale adhesively bonded steel‐composite joints. Three joints with an approximately 10‐mm‐thick layer of methyl methacrylate adhesive were manufactured in dockyard conditions. One specimen was tensile tested till failure, while two specimens were subjected to ~3.5 million fatigue cycles, followed by a residual tensile test supported with digital image correlation. The shear, longitudinal and peel strain values within the adhesive bondlines are significantly higher at the gripped sides due to the asymmetrical design of the steel brackets. All specimens showed a significantly higher shear strength than the design values defined by the shipbuilder. Fibre Bragg sensors monitored strains at steel and composite constituents and allowed to detect damage onset and evolution in tensile tested specimens. A finite element model of the joint was developed with material and interface properties based on dedicated small‐scale experiments. The simulation results of strains during a static load test corresponded closely to the DIC measurements. All specimens failed near the composite‐adhesive interface due to delamination of the composite panel.","PeriodicalId":21972,"journal":{"name":"Strain","volume":"27 21","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135973699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Plane–strain condition in plane–strain grooved tensile (PSGT) specimens during traction and creep loading at room and high temperature 平面应变槽拉伸(PSGT)试件在室温和高温牵引和蠕变加载下的平面应变状态

3区材料科学

Strain Pub Date : 2023-10-30 DOI: 10.1111/str.12467

C. Ovalle, M. Broudin, L. Laiarinandrasana

{"title":"Plane–strain condition in plane–strain grooved tensile (PSGT) specimens during traction and creep loading at room and high temperature","authors":"C. Ovalle, M. Broudin, L. Laiarinandrasana","doi":"10.1111/str.12467","DOIUrl":"https://doi.org/10.1111/str.12467","url":null,"abstract":"Abstract ISO 23228:2011 proposed a testing method in which the plastic material, experimental resins or compounds for pipes and fittings, can be exposed to stress conditions that mimic internally pressurised end‐capped pipes. The stress conditions are mimicked by the use of a plaque specimen having a grooved reduced section called plane–strain grooved tensile (PSGT) specimens producing a biaxial state of stress under uniaxial loading. In this study, PSGT specimens were cut out from high‐density polyethylene (HDPE) pipes. Two shape ratios, ratio between the width and the groove thickness, were used. Both the axial and transverse displacements and strain fields were followed by a digital image correlation (DIC) camera during tensile and creep loading, both at room and high temperature; furthermore, DIC images were used to estimate the notch opening displacement. The increasing effect of the temperature in both the axial and transverse displacement and strain was highlighted. No significant effect of the width was noticed. The results have evidenced that, as the plane–strain condition in the width is assured during the tests, PSGT specimens can be used to mimic internally pressurised pipes under monotonic increasing or constant‐in‐time loading at both room and high temperature, but it must be better to use specimens with a higher shape ratio, that is, higher width. The results contribute to the 9th Sustainable Development Goal: Industry, Innovation and Infrastructure by promoting a sustainable industrialisation and fostering innovation.","PeriodicalId":21972,"journal":{"name":"Strain","volume":"843 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136069063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A single‐camera telecentric imaging stereo‐digital image correlation system and its application to carotid pulse signal detection 单相机远心成像立体数字图像相关系统及其在颈动脉脉冲信号检测中的应用

3区材料科学

Strain Pub Date : 2023-09-27 DOI: 10.1111/str.12466

Chao Chen, Xiaojun Tang, Bing Pan

引用次数: 0

Data science assisted cohesive finite element modelling of impact behaviour of AP‐HTPB crystal binder composite 数据科学辅助了AP - HTPB晶体粘结剂复合材料冲击行为的内聚有限元建模

3区材料科学

Strain Pub Date : 2023-09-26 DOI: 10.1111/str.12465

Hanson‐Lee Harjono, Saranya Ravva, Mahavir Singh, Henry Huang, Vikas Tomar

{"title":"Data science assisted cohesive finite element modelling of impact behaviour of AP‐HTPB crystal binder composite","authors":"Hanson‐Lee Harjono, Saranya Ravva, Mahavir Singh, Henry Huang, Vikas Tomar","doi":"10.1111/str.12465","DOIUrl":"https://doi.org/10.1111/str.12465","url":null,"abstract":"Abstract In this work, the response of an ammonium perchlorate (AP)‐hydroxyl‐terminated polybutadiene (HTPB) composite material under impact loading is presented, utilizing computational cohesive finite element method (CFEM) simulations that are validated with drop hammer experiments. This study examined the impact behaviour of AP crystal sizes between 200 and 400 μm by varying impact velocities between 3 and 10 m/s. Based on the outcome of CFEM simulations, analysis of variance (ANOVA) tests and a response surface method (RSM) were utilized to construct a mathematical model approximating the relationships between simulation inputs and outcomes. Both computational and experimental results show that the local strain rate has a considerable positive correlation with crystal size, and the rate of temperature change has positive correlations with both crystal size and impact velocity. Further, it was observed that stiffness and compression energy are the primary factors to variances in local strain rate and rate of change of temperature. RSM has been found to be an effective tool for modelling impact responses of materials under varying experimental conditions.","PeriodicalId":21972,"journal":{"name":"Strain","volume":"2018 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135718955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructural characterisation of 3D printed and injection‐moulded glass fibre‐reinforced polypropylene by image analysis, simulation and experimental methods 3D打印和注塑玻璃纤维增强聚丙烯的显微结构特征通过图像分析，模拟和实验方法

3区材料科学

Strain Pub Date : 2023-09-22 DOI: 10.1111/str.12463

Jörg Lienhard, Tin Barisin, Hannes Grimm‐Strele, Matthias Kabel, Katja Schladitz, Timo Schweiger

{"title":"Microstructural characterisation of 3D printed and injection‐moulded glass fibre‐reinforced polypropylene by image analysis, simulation and experimental methods","authors":"Jörg Lienhard, Tin Barisin, Hannes Grimm‐Strele, Matthias Kabel, Katja Schladitz, Timo Schweiger","doi":"10.1111/str.12463","DOIUrl":"https://doi.org/10.1111/str.12463","url":null,"abstract":"Abstract The mechanical properties of fibre‐reinforced thermoplastics and their dependencies on the manufacturing process, fibre properties, fibre concentration and strain rate have been researched intensively for years in order to predict their macroscopic behaviour by numerical simulations as precisely as possible. Including the microstructure in both real and virtual experiments has improved prediction precision for injection‐moulded glass fibre‐reinforced thermoplastics significantly. In this work, we apply three established methods for characterisation and modelling to an injection‐moulded and to a 3D printed material. The geometric properties of the fibre component as fibre orientation, fibre length and fibre diameter distributions are identified by analysing reconstructed tomographic images. For comparing the fibre lengths, a recently suggested new method is applied. Based on segmentations of the tomographic images, we calculate the elastic stiffness of both composites numerically on the microscale. Finally, the mechanical behaviour of both materials is experimentally characterised by micro tensile tests. The simulation results agree well with the measured stiffness in case of the injection‐moulded material. However, for the 3D printed material, measurement and simulation differ strongly. The prediction from the simulation agrees with the values expected from the image analytic findings on the microstructure. Therefore, the differences in the measured behaviour have to be contributed to the matrix material. This proves demand for further research for 3D printed materials for predictable prototypes, preproduction series and possible serial application.","PeriodicalId":21972,"journal":{"name":"Strain","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136060412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of woven yarn angle on the low‐velocity impact damage response of fibre woven thermoplastic composites 纺纱角度对纤维编织热塑性复合材料低速冲击损伤响应的影响

3区材料科学

Strain Pub Date : 2023-09-14 DOI: 10.1111/str.12464

Sasa Gao, Yunjie Zhang, Zeyu Wang, Zuwang Yu

{"title":"Effect of woven yarn angle on the low‐velocity impact damage response of fibre woven thermoplastic composites","authors":"Sasa Gao, Yunjie Zhang, Zeyu Wang, Zuwang Yu","doi":"10.1111/str.12464","DOIUrl":"https://doi.org/10.1111/str.12464","url":null,"abstract":"Abstract Fibre woven thermoplastic composites (FWTC) are widely used in aerospace and other fields because of their excellent performance. During service, FWTC structures are inevitably subjected to low‐velocity impact (LVI), which can cause invisible damage and eventual failure of the material. At the moment, studies on FWTC mostly focused on the orthogonal woven yarns while there's few reports about the effect of the yarn angle changing on the woven material's LVI damage response. This study aims at the effect of yarn angle changing on the damage behaviour of FWTC. A method for preparation of nonorthogonal prepregs was proposed, by which FWTC laminates with different yarn angles (60°, 75°, and 90°) were prepared for LVI tests. The results show that the maximum impact displacement and the impact duration of the impactor decrease with the decrease of the yarn angle when the FWTC laminate is subjected to LVI, while the maximum impact force shows an increasing trend. This indicates that the smaller yarn angle causes the better load‐bearing capacity of the FWTC laminate under LVI conditions, while the orthogonal FWTC laminate is more ductile. The damage morphology indicated by the impact of the FWTC laminate are matrix cracks and yarn breaks, and the damage area increases with the decrease of yarn angle, where the damage of orthogonal laminate is more serious more concentrated. The results found in this paper can provide useful guidance for engineering applications and failure analysis of FWTC.","PeriodicalId":21972,"journal":{"name":"Strain","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134970543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preliminary Analyses of Tympanic-Membrane Motion from Holographic Measurements. 全息测量对鼓膜运动的初步分析。

IF 2.1 3区材料科学

Strain Pub Date : 2009-06-01 DOI: 10.1111/j.1475-1305.2008.00490.x

C Furlong, J J Rosowski, N Hulli, M E Ravicz

{"title":"Preliminary Analyses of Tympanic-Membrane Motion from Holographic Measurements.","authors":"C Furlong, J J Rosowski, N Hulli, M E Ravicz","doi":"10.1111/j.1475-1305.2008.00490.x","DOIUrl":"https://doi.org/10.1111/j.1475-1305.2008.00490.x","url":null,"abstract":"<p><p>Computer-aided, personal computer (PC) based, optoelectronic holography (OEH) was used to obtain preliminary measurements of the sound-induced displacement of the tympanic membrane (TM) of cadaver cats and chinchillas. Real-time time-averaged holograms, processed at video rates, were used to characterise the frequency dependence of TM displacements as tone frequency was swept from 400 Hz to 20 kHz. Stroboscopic holography was used at selected frequencies to measure, in full-field-of-view, displacements of the TM surface with nanometer resolution. These measurements enable the determination and the characterisation of inward and outward displacements of the TM. The time-averaged holographic data suggest standing wave patterns on the cat's TM surface, which move from simple uni-modal or bi-modal patterns at low frequencies, through complicated multimodal patterns above 3 kHz, to highly ordered arrangements of displacement waves with tone frequencies above 15 kHz. The frequency boundaries of the different wave patterns are lower in chinchilla (simple patterns below 600 Hz, ordered patterns above 4 kHz) than cat. The stroboscopic holography measurements indicate wave-like motion patterns on the TM surface, where the number of wavelengths captured along sections of the TM increased with stimulus frequency with as many as 11 wavelengths visible on the chinchilla TM at 16 kHz. Counts of the visible number of wavelengths on TM sections with different sound stimulus frequency provided estimates of wave velocity along the TM surface that ranged from 5 m s(-1) at frequencies below 8 kHz and increased to 25 m s(-1) by 20 kHz.</p>","PeriodicalId":21972,"journal":{"name":"Strain","volume":"45 3","pages":"301-309"},"PeriodicalIF":2.1,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/j.1475-1305.2008.00490.x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28757565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 32