Engineering Solid Mechanics最新文献

Impact of thickness, void content, temperature and loading rate on tensile fracture toughness and work of fracture of asphalt mixtures- An experimental study using the SCB test 厚度、孔隙含量、温度和加载速率对沥青混合料拉伸断裂韧性和断裂工作的影响——采用SCB试验的实验研究

Engineering Solid Mechanics Pub Date : 2023-01-01 DOI: 10.5267/j.esm.2022.12.004

Mohammadreza Malek, M. Keymanesh

{"title":"Impact of thickness, void content, temperature and loading rate on tensile fracture toughness and work of fracture of asphalt mixtures- An experimental study using the SCB test","authors":"Mohammadreza Malek, M. Keymanesh","doi":"10.5267/j.esm.2022.12.004","DOIUrl":"https://doi.org/10.5267/j.esm.2022.12.004","url":null,"abstract":"Asphaltic concrete mixtures are among the most common construction materials for the pavement of roads. As a multi-phase composite mixture with randomly distributed aggregates inside the mastic part, the mechanical properties of such materials can be influenced by different factors. Cracking and induced fracture is among the common degradation and failure modes in these construction mixtures that often takes place in cold regions. In this research, the effects of some influencing parameters including temperature, air void percentage and loading rate are investigated experimentally on the fracture toughness (KIc) and work of fracture (WIc) of hot mix asphalt material. Edge notched semi-circular bend (SCB) specimen was employed to conduct mode I fracture experiments. The thickness of SCB samples were considered as variable and the HMA mixtures were tested with two SCB thicknesses of 30 and 60 mm. The experimental results showed that both fracture toughness and fracture work are increased by increasing the thickness. However, the effect of thickness on the fracture work was much more significant than the KIc value. Also, the fracture and cracking resistance parameters were increased by decreasing the temperature and air void content. Both KIc and WIc values were also increased by increasing the loading rate in the investigated range of 1 to 8 mm/min. The most influencing parameters on the change of fracture resistance parameters were the temperature, loading rate, air void content and thickness, respectively.","PeriodicalId":37952,"journal":{"name":"Engineering Solid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70760574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

The analysis of numerical self-compacting concrete wall panel models with variations of shear reinforcement 随剪力配筋变化的自密实混凝土数值模型分析

Engineering Solid Mechanics Pub Date : 2023-01-01 DOI: 10.5267/j.esm.2022.8.002

S. Nurjannah, S. Saloma, Yulindasari Yulindasari, K. Aminuddin, Gilbert Chuhairy

{"title":"The analysis of numerical self-compacting concrete wall panel models with variations of shear reinforcement","authors":"S. Nurjannah, S. Saloma, Yulindasari Yulindasari, K. Aminuddin, Gilbert Chuhairy","doi":"10.5267/j.esm.2022.8.002","DOIUrl":"https://doi.org/10.5267/j.esm.2022.8.002","url":null,"abstract":"Reinforced concrete wall critical zones are the responsive areas of dissipated earthquake loads. They are formed in the connection of the wall panels and the fixed restraints. The longitudinal and transversal steel reinforcements with certain spacing are designed according to the required nominal strength at the connections. Under certain conditions, the reinforcement distance becomes very tight, making working on castings using normal concrete difficult. This condition also occurs in boundary elements consisting of longitudinal and transversal reinforcements in tight spaces. A concrete material that flows easily and solidifies itself is required to avoid segregation. One type of this material is Self-Compacting Concrete (SCC). The SCC performance as a wall panel material that withstands gravity and cyclic lateral loads still require further research. This study aimed to analyze the hysteretic performance of reinforced SCC wall panels with variations of shear reinforcement in resisting cyclic lateral loads. The analysis used software based on numerical analysis. The drift ratios, hysteretic curves, stress patterns, ductility, and stiffness of the wall panels were analyzed. The SCC wall panel with ordinary shear reinforcement resisted lateral positive and negative loads of 152.32 kN and 143.09 kN, respectively. In comparison, the wall panel with boundary elements and tighter shear reinforcements could withstand the positive and negative lateral loads of 187.62 kN and 145.98 kN, respectively. The SCC wall panel reached the best ductility of 21.38 with ordinary shear reinforcement because the yield occurred faster than in other wall panels. The results showed that the boundary elements and shear reinforcements of reinforced SCC wall panels affected the performance in resisting cyclic lateral loads.","PeriodicalId":37952,"journal":{"name":"Engineering Solid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70760987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Kenaf-Coir based hybrid nano-composite: an analytical and representative volume element analysis 红麻-椰胶基杂化纳米复合材料:分析和代表性体积元分析

Engineering Solid Mechanics Pub Date : 2023-01-01 DOI: 10.5267/j.esm.2022.8.001

Shikha Parashar, V. Chawla

引用次数: 4

A study on the vibration of a bus with air suspension system moving on random road surface profiles with different speeds 空气悬架客车在随机路面上以不同速度行驶时的振动特性研究

Engineering Solid Mechanics Pub Date : 2023-01-01 DOI: 10.5267/j.esm.2023.1.004

N. T. Tung, L. V. Van

引用次数: 0

Influence of chemical composition of soda ash activated fly ash and copper slag geopolymer pastes on compressive strength 纯碱活化粉煤灰与铜渣地聚合物膏体化学成分对抗压强度的影响

Engineering Solid Mechanics Pub Date : 2023-01-01 DOI: 10.5267/j.esm.2023.4.002

I. Erunkulu, G. Malumbela, O. Oladijo

{"title":"Influence of chemical composition of soda ash activated fly ash and copper slag geopolymer pastes on compressive strength","authors":"I. Erunkulu, G. Malumbela, O. Oladijo","doi":"10.5267/j.esm.2023.4.002","DOIUrl":"https://doi.org/10.5267/j.esm.2023.4.002","url":null,"abstract":"The effect of the chemical composition of geopolymer pastes on compressive strength was investigated in high-calcium fly ash and copper slag blends. In synthesizing the pastes, soda ash at activator to binder ratio of 0.4 was used. The characterization of material samples and the hardened fly ash-copper slag pastes was conducted through X-ray fluorescence (XRF), and X-ray diffraction (XRD) for the major oxide and phase composition. The hardened paste cubes which were cured at 80 °C were tested for compressive strength at ages 3, 7, and 28 days to obtain the mechanical performance property of each respective mix. The findings establish the impact of variation in the individual material and paste composition on the compressive strength of fly ash-copper slag geopolymer. The result shows that increase in the SiO2/Al2O3 and Na2O/Al2O3 ratios of paste products of samples corresponded to an increase in compressive strength. Whilst Fe2O3 wt.% increase in products from slag addition and positively influenced the compressive strength as fillers. However, CaO had no positive influence on the matrix of the activated product. The optimal blend mix design was 40 wt.% of copper slag which achieved a 28-day compressive strength of 24.66 MPa.","PeriodicalId":37952,"journal":{"name":"Engineering Solid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70761522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental analysis of bolted, bonded, and hybrid spliced joint connections in glass fiber reinforced polymer short column 玻璃纤维增强聚合物短柱中螺栓连接、粘结连接和混合拼接连接的试验分析

Engineering Solid Mechanics Pub Date : 2023-01-01 DOI: 10.5267/j.esm.2023.3.001

M. J. Srujan, S. Srikanth

{"title":"Experimental analysis of bolted, bonded, and hybrid spliced joint connections in glass fiber reinforced polymer short column","authors":"M. J. Srujan, S. Srikanth","doi":"10.5267/j.esm.2023.3.001","DOIUrl":"https://doi.org/10.5267/j.esm.2023.3.001","url":null,"abstract":"Glass Fiber Reinforced Polymer (GFRP) is a polymer composite material used in lightweight structures. This study provides insight into achieving robust GFRP H-section short-column spliced connections using bonded, bolted, and hybrid connections. The design specifications for steel splicing connections are based on BS EN 1990 and BS EN 1991 guidelines. Based on the samples subjected to axial loading, factors such as compressive strength, bonding and bearing resistance, compression behavior of the connection, and failure modes of the structure are investigated. The study includes the behavioral characteristics and results of 25 GFRP H-section Spliced connections, with each H-section measuring 152 x 72 x 6.4 mm and standing 350 mm in height. This study also examines the behavior of a composite splice joint made up of steel cover plates and steel bolts that are used to create an ideal non-bearing spliced connection. This model is used to compare to the other models to understand the behavior of spliced joints designed with GFRP cover plates. This paper holds design specifications of connections that have displayed compressive strengths of 82.35 %, 89.82 %, and 92.83 % compared to that of an un-cut GFRP H-section subjected to axial loading.","PeriodicalId":37952,"journal":{"name":"Engineering Solid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70761577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Negative stiffness honeycomb structure as automobile leaf spring: A numerical investigation 负刚度蜂窝结构作为汽车钢板弹簧的数值研究

Engineering Solid Mechanics Pub Date : 2023-01-01 DOI: 10.5267/j.esm.2023.5.005

Fahim Faisal Arnob, Md Sayed Anwar, M. Islam, M. Arifuzzaman, Md Abdullah Al Bari

{"title":"Negative stiffness honeycomb structure as automobile leaf spring: A numerical investigation","authors":"Fahim Faisal Arnob, Md Sayed Anwar, M. Islam, M. Arifuzzaman, Md Abdullah Al Bari","doi":"10.5267/j.esm.2023.5.005","DOIUrl":"https://doi.org/10.5267/j.esm.2023.5.005","url":null,"abstract":"The leaf spring is one of the main components in an automobile which carries the weight of the vehicle and passenger as well as absorbs the vibration and shock produced due to road irregularities. The weight, natural frequency, stress developed, energy absorption, fatigue life, etc. are the key factors that need to be considered to design a leaf spring. Towards that, a novel design integrating a Negative Stiffness Honeycomb Structure (NSHS) in the leaf spring is proposed. The proposed design and the traditional leaf spring are analyzed using the commercially available Finite Element Method (FEM) software Abaqus. Both the traditional and NSHS models were created using Solidworks and modal, harmonic, structural, and transient analyses were performed. It is found that the natural frequency of the NSHS leaf spring is well above the frequency produced due to road irregularities although it is lower than the traditional spring. The total weight of the NSHS spring structure is reduced significantly by 30.73% compared to the traditional spring. Structural analysis shows a lower stress development and higher energy absorption capacity for the NSHS leaf spring. Transient analysis reveals lower mean stress in the proposed NSHS spring. The fatigue life is also found to be 82.78 % higher in the proposed design. The NSHS-incorporated novel leaf spring design may be an excellent alternative to the traditional leaf spring.","PeriodicalId":37952,"journal":{"name":"Engineering Solid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70761966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of a novel above-knee prosthetic leg with a passive energy-saving mechanism 一种新型被动节能机构膝上假腿的设计

Engineering Solid Mechanics Pub Date : 2023-01-01 DOI: 10.5267/j.esm.2023.5.009

A. Imran, M. Haghjoo, B. Beigzadeh

{"title":"Design of a novel above-knee prosthetic leg with a passive energy-saving mechanism","authors":"A. Imran, M. Haghjoo, B. Beigzadeh","doi":"10.5267/j.esm.2023.5.009","DOIUrl":"https://doi.org/10.5267/j.esm.2023.5.009","url":null,"abstract":"The push-off phase is a critical part of initiating movement during walking, and it requires a significant amount of energy. Recent research has shown that the passive use of springs in parallel with the leg can harvest the push-off energy and reduce the total metabolic energy of walking for healthy subjects. In this study, we present the design of a prosthetic leg with a passive-based mechanism to reduce walking energy consumption for above-knee amputees. The mechanism stores energy during the stance phase of the gait cycle and releases it to support the prosthetic leg during locomotion. The known polycentric knee joint 3R36 and the ankle-foot joint ESAR were chosen and adopted for this study. We also utilized a ratchet clutch that connects with a spring and rope from the pylon to the foot which regulates movement and saves energy. Our simulations demonstrate that the spring stores elastic energy from approximately 22% of the gait cycle and reaches its maximum energy storage at approximately 50% of the walking cycle. The energy is then released at approximately 58% of the stride cycle during the push-off phase. The motion of the proposed prosthetic leg for individuals with transfemoral amputations mimics the normal walking pattern of healthy individuals well.","PeriodicalId":37952,"journal":{"name":"Engineering Solid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70762345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Stress state of workpieces during upsetting with additional shear 附加剪切镦粗时工件的应力状态

Engineering Solid Mechanics Pub Date : 2023-01-01 DOI: 10.5267/j.esm.2022.9.002

Z. Ashkeyev, Maxat Abishkenov, K. Nogaev

引用次数: 0

A micromechanical study on the correlation of the microstructure and failure mechanism of dual-phase steels under tension 拉伸作用下双相钢组织与失效机理的微观力学研究

Engineering Solid Mechanics Pub Date : 2023-01-01 DOI: 10.5267/j.esm.2023.1.003

M. S. Mohsenzadeh

{"title":"A micromechanical study on the correlation of the microstructure and failure mechanism of dual-phase steels under tension","authors":"M. S. Mohsenzadeh","doi":"10.5267/j.esm.2023.1.003","DOIUrl":"https://doi.org/10.5267/j.esm.2023.1.003","url":null,"abstract":"In this study, the influence of the volume fraction of the martensite phase as well as the size of the martensite particles on the mechanism of particle fracture in dual-phase steel were examined. A combined continuum/dislocation based approach was used in order to model the average stress in the martensite particles. It was found that the model predictions are in accordance with the experimental results. For the same volume fraction of the martensite particles, the model predicts an increase of the internal stress and the average stress in the martensite particles with increasing the particles size. Since the fracture strength of the martensite depends on its volume fraction, the particle size has no effect on the mechanism of particle fracture. Increasing the volume fraction of the martensite particles results in the enhancement of the internal stress in the martensite particles. However, it has a slight influence on the average stress in the particles. Nevertheless, because of decreasing the fracture strength of martensite with increasing its volume fraction, this parameter has a main role in the occurrence of the particle fracture mechanism.","PeriodicalId":37952,"journal":{"name":"Engineering Solid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70761428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0