Experimental Techniques最新文献_第7页

Comparing Local Versus Global Filtering Techniques on Fast Pressure-Sensitive Paint Data 快速压敏涂料数据局部滤波与全局滤波的比较

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-06-06 DOI: 10.1007/s40799-025-00814-4

P. Livens, E. Ukshini

{"title":"Comparing Local Versus Global Filtering Techniques on Fast Pressure-Sensitive Paint Data","authors":"P. Livens, E. Ukshini","doi":"10.1007/s40799-025-00814-4","DOIUrl":"10.1007/s40799-025-00814-4","url":null,"abstract":"<div>Fast pressure-sensitive paint (FPSP) allows for measuring the pressure distribution in a variety of challenging conditions. However, a key issue is processing the recorded intensity data to allow accurate reconstruction of the pressure field. Most challenging is accurately filtering out noise from the measured intensity field, while preserving the underlying measured pressure distribution. A common approach is a local filtering operation, such as Gaussian-weighted pixel averaging. Alternatively, a global approach can be taken, where the entire measured intensity field is mapped via a least squares (LS) minimization routine. In this paper, we introduce a regularized LS-approach called RELS, which further allows filtering of noise. Therefore, this paper explores the effects of either local Gaussian filtering or global LS or RELS data filtering on the measured pressure field across the surface. The results demonstrate that local filters are more time-efficient than global filters when the number of images to process is low. However, when the number of images to process is significant, global approaches are faster, since the global interpolation matrix only needs to be constructed once. Moreover, global approaches achieve lower error bounds compared to the Gaussian filter at similar filter size, and are recommended even at the cost of slower computation time. For the RELS approach, the standard deviation of the identified pressure field decreases by a factor of two compared to a Gaussian filter of similar size.</div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 2","pages":"243 - 254"},"PeriodicalIF":1.9,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147558948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Weak Texture Enhancing Method Based on Curvelet Transformation and γ-CLAHE Correction in Digital Image Correlation 基于曲波变换和γ-CLAHE校正的弱纹理增强方法

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-06-02 DOI: 10.1007/s40799-025-00813-5

Y. Wen, L. Li, H. An, L. Zheng, J. Wang, Y. Long

{"title":"Weak Texture Enhancing Method Based on Curvelet Transformation and γ-CLAHE Correction in Digital Image Correlation","authors":"Y. Wen, L. Li, H. An, L. Zheng, J. Wang, Y. Long","doi":"10.1007/s40799-025-00813-5","DOIUrl":"10.1007/s40799-025-00813-5","url":null,"abstract":"<div>Weak texture images may easily reduce the quality of images, which affects the measurement accuracy of digital image correlation (DIC) test. Although several methods in the filed of 3D surface reconstruction and features extraction of weak texture images had been proposed, few of them focused on the displacement and deformation measurement of DIC, and the effects of weak texture after being processed on the DIC test have not been considered. To solve this problem, a weak texture enhancing method is proposed in this study, which is conducted by decomposing the weak texture image into curvelet domain, and filtered to a representative texture scale-image based on Gray Level Concurrence Matrix (GLCM) and mean intensity gradient (MIG), then processing the representative texture scale-image using γ-correction and contrast limited adaptive histogram equalization (CLAHE). Through the numerical uniaxial displacement and deformation experiment, physical rigid body in-plane rotation test and four-point bending test of weak texture images, the measurement performance of this proposed method is validated. The results show that the proposed method can efficiently optimize the speckle qualities of the weak texture images, and markedly improve the measurement accuracy in DIC test.</div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 2","pages":"217 - 229"},"PeriodicalIF":1.9,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147558967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

In-Situ Measurement of Creep Mechanisms at a High Temporospatial Resolution 高时空分辨率蠕变机制的原位测量

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-06-02 DOI: 10.1007/s40799-025-00811-7

B. Elbrecht, G. J. Pataky

引用次数: 0

Experimental Studies and Multi-Response Optimization of Cutting Forces, Vibrations and Groove Width Accuracy in Milling of Cortical Bone 骨皮质铣削切削力、振动及槽宽精度的实验研究及多响应优化

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-05-21 DOI: 10.1007/s40799-025-00810-8

Q. Zhang, V. Sivalingam, M. Prasanth Balasubramanian, M. Liu, M. Sun, S. Qin

{"title":"Experimental Studies and Multi-Response Optimization of Cutting Forces, Vibrations and Groove Width Accuracy in Milling of Cortical Bone","authors":"Q. Zhang, V. Sivalingam, M. Prasanth Balasubramanian, M. Liu, M. Sun, S. Qin","doi":"10.1007/s40799-025-00810-8","DOIUrl":"10.1007/s40799-025-00810-8","url":null,"abstract":"<div>This study investigates and optimizes the pig hind leg bone milling process using a tungsten steel alloy ball head milling cutter to understand the effects of various cutting speeds (Vc) and feed rates (f) to analyze the cutting forces, bending moments, vibration signals and groove width accuracy. Experimental results indicated that cutting forces and bending moments increased with higher speeds and ‘f ’, due to the non-uniform anisotropic structure of the cortical bone. Vibration analysis also indicated that the tool vibration was significantly affected by ‘Vc’ and ‘f ’, highlighting the role of resonance frequency effects of the tool due to non-utilization of the coolant. Groove width analysis demonstrated that the viscoelastic property of the bone material could lead to deviations between set and actual groove widths, with higher ‘Vc’ and ‘f ’ improving accuracy, but excessive ‘f ’ led to debris accumulation. An SEM analysis of the tool was performed to understand the effects of the tool wear. MOORA, a multi-objective optimization, results indicated that experiment number 1 with Vc of 30 m/min, f of 0.10 mm/rev, n of 2400 r/min influences the performance parameters. Findings from the study emphasize the advancement of bone surgery techniques may reduce errors and enhance surgical outcomes and pave the way to the future of robotic-assisted and minimally invasive surgeries.</div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 2","pages":"201 - 216"},"PeriodicalIF":1.9,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147560776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Modeling and Experimental Study of Smart Bolt Based on ZnO Piezoelectric Thin Film Sensor 基于ZnO压电薄膜传感器的智能螺栓建模与实验研究

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-05-16 DOI: 10.1007/s40799-025-00804-6

G. Mo, H. Yu

引用次数: 0

Use of Hydraulic Systems for High-Rate Compression Testing 液压系统在高速压缩试验中的应用

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-05-09 DOI: 10.1007/s40799-025-00802-8

J. T. Dinotte, M. Iskander, A. Ads, S. Bless, M. Omidvar

引用次数: 0

Experimental Investigation of Ballistic Impact Performance of Composite Structures Prepared by Shear Thickening Fluid Impregnation Into Aramid, Uhmwpe, and Hybrid Fabrics 剪切增稠流体浸渍芳纶、超高分子量聚乙烯和混杂织物制备复合材料结构的弹道冲击性能实验研究

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-05-05 DOI: 10.1007/s40799-025-00809-1

K. M. Ercümen, M. Aydin

{"title":"Experimental Investigation of Ballistic Impact Performance of Composite Structures Prepared by Shear Thickening Fluid Impregnation Into Aramid, Uhmwpe, and Hybrid Fabrics","authors":"K. M. Ercümen, M. Aydin","doi":"10.1007/s40799-025-00809-1","DOIUrl":"10.1007/s40799-025-00809-1","url":null,"abstract":"<div>This study presents soft armor design strategies with composite samples produced by impregnating STF into aramid, ultra-high molecular weight polyethylene (UHMWPE) and hybrid fabric types. STF was made by dispersing silica nanoparticles in polyethylene glycol at 40 weight% (wt%). The effects of fabric types and hybrid fabric arrangement sequences on energy absorption were experimentally investigated using a single-stage gas gun system. STF-treated fabrics demonstrated a significant increase in energy absorption compared to non-STF-treated fabrics. The extent of this increase varies depending on the fabric type. STF impregnation was found to be more effective in woven aramid fabric, resulting in a 72.7% increase in energy absorption compared to neat fabric. In contrast, STF impregnation of unidirectional UHMWPE fabric led to only a 3.3% increase. In addition to enhancing energy absorption, STF impregnation also demonstrated that altering the fabric arrangement sequence in hybrid samples influences energy absorption. The H3 hybrid sample, consisting of 15 layers of aramid fabric and 15 layers of UHMWPE fabric, exhibited the highest energy absorption. For practical applications in soft body armor design, the effect of fabric arrangement sequence should be considered.</div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 6","pages":"1153 - 1165"},"PeriodicalIF":1.9,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145706094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Calibration of the Induction Heating System for Dynamic Compression Test 动态压缩试验感应加热系统的标定

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-05-02 DOI: 10.1007/s40799-025-00807-3

T. Jankowiak, W. Szymkuć, M. Malendowski, K. Cabová, J. Šejna, V. Mózer, F. Wald

引用次数: 0

Bootstrap Prediction and Confidence Bands for Frequency Response Functions in Posturography 姿态照相中频率响应函数的自举预测和置信带

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-05-02 DOI: 10.1007/s40799-025-00808-2

V. Lippi

引用次数: 0

Experimental Study on Deformation and Cracking of Casing with Defects Under Non-Uniform Load 非均匀载荷作用下含缺陷套管变形与开裂试验研究

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-04-30 DOI: 10.1007/s40799-025-00803-7

J. Sun, L. Zhang, J. Fan, Y. Liu, Y. Yang, Z. Yang, Z. Zhang

{"title":"Experimental Study on Deformation and Cracking of Casing with Defects Under Non-Uniform Load","authors":"J. Sun, L. Zhang, J. Fan, Y. Liu, Y. Yang, Z. Yang, Z. Zhang","doi":"10.1007/s40799-025-00803-7","DOIUrl":"10.1007/s40799-025-00803-7","url":null,"abstract":"<div>In order to study the deformation and cracking behavior of casing with defects under non-uniform load, different types of defects were prefabricated on the surface of casing samples by building a test system. The cracking and crack propagation process of samples under non-uniform load were observed and analyzed by finite element simulation. The test results show that the defect will significantly reduce the bearing capacity of the casing under non-uniform load, and the defect is a necessary condition for the cracking failure of the material. The defect depth affects the bearing capacity of the sample, and the defect width affects the deformation of the sample. With the increase of the depth of the defect, the maximum load of the sample and the maximum load loading displacement approximate S curve decrease; with the increase of the width of the defect, the deformation of the sample under the same load in the load reduction stage of the sample increases obviously. The variation curve of crack length with loading displacement is obtained, and the finite element model of casing with defects is established, which can analyze and evaluate the stress and deformation distribution of casing. The research results can provide guidance for casing damage evaluation and field detection.</div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 6","pages":"1127 - 1139"},"PeriodicalIF":1.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145706085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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