3D 프린팅 모델 시편을 활용한 도로 노면 조직 특성에 따른 노면 마찰력 예측

정우형,김재훈,이승우,김영규 한국도로학회 2024 한국도로학회논문집 Vol.26 No.2

PURPOSES : Pavement surface friction depends significantly on pavement surface texture characteristics. The mean texture depth (MTD), which is an index representing pavement surface texture characteristics, is typically used to predict pavement surface friction. However, the MTD may not be sufficient to represent the texture characteristics to predict friction. To enhance the prediction of pavement surface friction, one must select additional variables that can explain complex pavement surface textures. METHODS : In this study, pavement surface texture characteristics that affect pavement surface friction were analyzed based on the friction mechanism. The wavelength, pavement surface texture shape, and pavement texture depth were hypothesized to significantly affect the surface friction of pavement. To verify this, the effects of the three abovementioned pavement surface texture characteristics on pavement surface friction must be investigated. However, because the surface texture of actual pavements is irregular, examining the individual effects of these characteristics is difficult. To achieve this goal, the selected pavement surface texture characteristics were formed quantitatively, and the irregularities of the actual pavement surface texture were improved by artificially forming the pavement surface texture using threedimensionally printed specimens. To reflect the pavement surface texture characteristics in the specimen, the MTD was set as the pavement surface texture depth, and the exposed aggregate number (EAN) was set as a variable. Additionally, the aggregate shape was controlled to reflect the characteristics of the pavement surface texture of the specimen. Subsequently, a shape index was proposed and implemented in a statistical analysis to investigate its effect on pavement friction. The pavement surface friction was measured via the British pendulum test, which enables measurement to be performed in narrow areas, considering the limited size of the three-dimensionally printed specimens. On wet pavement surfaces, the pavement surface friction reduced significantly because of the water film, which intensified the effect of the pavement surface texture. Therefore, the pavement surface friction was measured under wet conditions. Accordingly, a BPN (wet) prediction model was proposed by statistically analyzing the relationship among the MTD, EAN, aggregate shape, and BPN (wet). RESULTS : Pavement surface friction is affected by adhesion and hysteresis, with hysteresis being the predominant factor under wet conditions. Because hysteresis is caused by the deformation of rubber, pavement surface friction can be secured through the formation of a pavement surface texture that causes rubber deformation. Hysteresis occurs through the function of macro-textures among pavement surface textures, and the effects of macro-texture factors such as the EAN, MTD, and aggregate shape on the BPN (wet) are as follows: 1) The MTD ranges set in this study are 0.8, 1.0, and 1.2, and under the experimental conditions, the BPN (wet) increases linearly with the MTD. 2) An optimum EAN is indicated when the BPN (wet) is the maximum, and the BPN decreases after its maximum value is attained. This may be because when the EAN increases excessively, the space for the rubber to penetrate decreases, thereby reducing the hysteresis. 3) The shape of the aggregate is closely related to the EAN; meanwhile, the maximum value of the pavement surface friction and the optimum EAN change depending on the aggregate shape. This is believed to be due to changes in the rubber penetration volume based on the aggregate shape. Based on the results above, a statistical prediction model for the BPN (wet) is proposed using the MTD, EAN, and shape index as variables. CONCLUSIONS : The EAN, MTD, and aggregate shape are crucial factors in predicting skid resistance. Notably, the EAN and aggregate shape, which are not incorporated into existing pavement surface ...

The Innovative Application of Surface Texture in Fashion and Textile Design

( Gong Lin ),( Jooyoung Shin ) 한국의류산업학회 2013 한국의류산업학회지 Vol.15 No.3

This study focuses on ‘texture’ as one of the most important fashion and textile design elements; in addition, it proposes various applications of it. Surface texture is indispensable in fashion and textile design that also factors heavily into innovative creations. Along with technological advances in the fashion industry, surface texture has derived many new and attractive features that provide more opportunities for designers to show various design concepts. Rather than the surface quality of fabrics, surface texture in fashion design creates its identity through a manipulation of materials- an application that tends to be primarily for visual effects without being restricted to decorative purposes. The status and significance of surface texture in various creative fields is explored and the evolution of surface texture is traced by analyzing a number of fashion design cases with representative surface textures. The latest feature of surface texture in fashion and textile design is identified to establish a new classification of surface texture with five groups and technical suggestions. This study provides a theoretical basis for this field of study and a new framework that can be employed in the development of surface textures that use innovative techniques as well as the future application of newly-developed textures.

옻칠 고온경화기법을 활용한 알루미늄 표면장식에 관한 연구

김대건,차경철 사단법인 한국조형디자인협회 2019 조형디자인연구 Vol.22 No.4

본 연구는 알루미늄 표면 질감과 고온경화 환경에 따른 옻칠고온경화기법의 도막형성과 강도 및 접착력 정도를 알아보기 위한 것이다. 알루미늄은 다른 금속에 비해 가볍고, 가공성이 우수하며, 비교적 경제적인 소재로서 일반 산업 소재뿐만 아니라 금속 조형작업에도 적합하여 금속제 가구, 조명, 장신구 등에 널리 사용되고 있다. 알루미늄 판재를 가공하여 입체형태로 만들기 위해서는 판재를 절곡, 밴딩, 망치성형과 용접 작업을 병행하게 된다. 이렇게 용접 부분이 형성된 작업물의 접합한 부분에는 양극산화기법을 적용하게 되면 얼룩이 생기게 되어 원하는 색상 표현에 문제점이 발생한다. 합성수지도료를 사용하는 도장법을 활용하여 작업의 색상을 표현할 수 있지만, 금속 조형작업의 마감 표면착색 기법으로써 아쉬운 점이 있다. 이러한 아쉬움에 본 연구자는 알루미늄 판금 성형 작업에 적용할 수 있는 고급스러우며 부가가치가 높은 알루미늄 표면처리 방법에 대하여 연구를 하였다. 여러 금속 공예가들은 색상의 다양한 표현을 위해 여러 가지 방법을 사용하고 있다. 그 중 전통적이며 친환경적인 소재인 옻칠을 작업에 적용하는 것을 볼 수 있다. 옻칠은 역사적 가치와 강한 접착력과 내구성 등 여러 우수성을 지닌 전통적인 소재이며 색상표현 및 광택도의 고급스러움으로 알루미늄 금속 조형작업의 표면마감 기법으로 적합하다. 금속 소재에 옻칠을 안착시키기 위해서는 가마나 가스토치 등 가열경화 하는 방법을 사용한다. 일정의 고온이 유지되어 옻칠이 금속 표면에 접착이 되는데, 가열경화의 환경과 표면질감은 도막형성에 영향을 준다. 옻칠의 가열경화 환경과 알루미늄 표면질감이 옻칠의 도막형성에 어떻게 영향을 주는지 확인하기 위해 가열경화 환경으로 가열시간과 가열온도의 변화를 주어 실험하였고, 알루미늄 표면질감으로 정제된 판, #320 사포 연마된 상태, 모래맞춤가공 상태, 망치 질감 4가지 상태로 나뉘어 실험하였다. 4가지 알루미늄 표면질감과 경화 시간과 경화 온도에 따른 도막형성 정도의 시편을 만들었고, 만들어진 시편에 연필 강도 실험과 크로스커트 실험을 통해 알루미늄 표면과 옻칠고온경화 환경에 따른 접착력 및 강도 실험 결과를 도출하였다. 옻칠의 가열경화 환경 중 가열시간 보다는 일정 가열온도에 따라 접착력이 높은 도막을 형성하였고, 광택이 난 표면질감은 사포연마와 망치 질감보다 접착력이 떨어졌으며, 모래맞춤 가공된 상태의 표면질감이 가장 접착력이 높은 것을 확인할 수 있었다. 실험을 통하여 옻칠의 가열경화 환경과 알루미늄 표면상태에 따라 옻칠의 강도와 접착력이 다름을 파악할 수 있었다. 다양한 알루미늄 판금성형에 옻칠을 적용은 금속작업의 경량화, 색상표현의 다양화 등의 장점을 갖추며, 장식적이고 부가가치가 높은 표면처리로 알루미늄 판금성형 작업의 심미성을 더하고 그 가치를 높일 수 있으리라 기대한다. This study aims to identify film formation, intensity and adhesion degree of the high temperature hardening technique of a Otchill according to a surface texture of aluminum and a high temperature hardening environment. Aluminum has advantages over other metals, for instance, lighter weight, more excellent machinability and relatively cheaper price. Therefore, it is widely used in metallic furniture, lighting devices or stylish accessories because it is suitable for not only a general industrial material but also metallic molding works. In order to fabricate a specific conformation shape by processing aluminum plates, it is required to perform several different works on the plates such as cutting, bending, hammering formation and welding. If an anodic oxidation method is applied in such a welded part of the fabricated object, a stain occurs to cause problems in representing the color wanted. Although, of course, there is a way to represent the color of work through a painting of synthetic resin paints, it is not sufficient as a finishing surface coloring technique of metallic formation works. In this regard, the researcher has studied on the surface treatment method of aluminum that is a luxurious and highly value added material, and that can be applied in a sheet metal formation works. Many metal craftsmen use a variety of methods for various representations of colors. Of those, it is sometimes possible to see that a Otchill, which is a traditional and eco-friendly material, is applied in the works. Lacquer is a traditional material that shows off many superiorities including traditional values, strong adhesion and durability, in addition, it is appropriate to a surface finishing material of metallic formation works using aluminum due to its luxurious sensation in terms of color representation and brilliance. Hardening with heating methods such as kilns or gas torches are typically required in order to stain a metallic material with a Otchill. In other words, a Otchill can be stained on the metal surface by maintaining a specific high temperature and the film formation is affected by environment of heat hardening and surface texture. To identify the impacts of both heat hardening environment by a lacquer and surface texture of aluminum on the film formation in a lacquer, experiments were conducted by altering the heating time and temperature under the environment of heat hardening. The experiments were conducted by dividing into 4 states, including a refined plate with surface texture of aluminum, a ground state by the #320 sandpaper, a state by sandblast processing and a hammer texture. The specimens, which are in line with film formation degrees according to the 4 different surface textures of aluminum as well as the time and temperature for hardening, were fabricated. With these specimens fabricated, the experiment results on adhesion and strength according to the aluminum surface and high temperature hardening environment for a Otchill were derived through a strength experiment of a pencil and crosscut experiment. The film with a higher adhesion was formed with the specific heating temperature rather than the heating time among environmental factors for heat hardening of a Otchill. In addition, it was confirmed that a surface texture showing a brilliance had less adhesion than sandpaper grinding or hammering texture and the surface texture of sandblast processing exhibited the highest adhesion. It was possible to identify through the experiments that strength and adhesion of a lacquer varied according to the heat hardening environment of a Otchill and surface status of aluminum. It is anticipated that applying a Otchill on various aluminum plate moldings will not only increase the aesthetic impression of a plate molding work of aluminum but also heighten its value because it has advantages of weight lightening of metallic works, a diversity of color representation and the ornamental and high value-added surface tre...

제주 해안의 지질 표면 질감(Texture)을 활용한 세라믹 패턴 개발 연구

이은비,오창윤 한국도자학회 2016 한국도자학연구 Vol.13 No.3

The purpose of the study is to develop a ceramic pattern using the surface texture from Jeju Island, which is peculiar due to its formation process, and to express the original texture characteristics of the island, as well as the possibility for new ceramic expression. Jeju Island is a beautiful volcanic island created from numerous volcanic eruptions, and possesses various kinds of geological landscape due to weathering and erosions of the terrains. The volcanic eruptions in the past provided the background for the island to have peculiar geological features. Recently, the geological features in the island’s coast is being esteemed for its cultural value, while various studies are being conducted regarding the same. Upon examining the utilization of ceramics in such circumstances, the texture expression of coastal geology is only understood as the surface texture of basalt. In other words, the texture of the geological surface in ceramic expression is expressed only as a cross-sectional image, by simply churning out the texture of geological surface repeatedly. This is regarded as a reason why the variety of expressing the island’s characteristics cannot be achieved. Therefore, the scope of the study was set as the geology of the coast in Jeju Island, and the following process was given to suggest the development of a ceramic pattern which utilizes the original texture of Jeju Island. First, the geological textures, which are used in this study, were selected based on the discussion on the formation of Jeju Island, and were printed out. The surface textures of Jeju’s coastal area were mostly strong or rough, with pores on them. In some textures, the size of pores was small, and the surface was soft. Second, the printed textures underwent primary pattern development through plastering. Total 6 patterns were developed as a result. Third, the primarily developed patterns were recombined to develop new ceramic patterns. In this stage, the textures, were classified into either rough ones or soft ones, depending on the solidification rate and by the shape of pores, to consider the utilization of pattern in the future. Also, it was found from this stage, that the texture of coastal surface alone can be used for the development of ceramic patterns, through the contrast and arrangement of the textures obtained in this study. Fourth, by applying the developed ceramic pattern to the actual pottery, a new possibility was suggested for expressing the pottery through the development of pattern. The present study, which conducted the development of ceramic pattern by utilizing the surface texture of Jeju Island’s coast, showed that the development of ceramic pattern can be achieved by using merely the geological surface texture. Also, the study showed that the ceramic pattern developed as a result represents the uniqueness of Jeju Island. The study also tried to search the variety of ceramic expression, through numerous type of recominbation. 본 연구는 제주의 형성과정으로 인해 다른 표면 질감을 나타내고 있는 해안 지질의 표면질감(Texture)을 이용한 세라믹 패턴 개발을 진행하여, 제주만의 독특한 질감 표현과 도자표현의 새로운 가능성을 모색하는데 목적이 있다. 제주도는 여러 차례 화산분출에 의해 형성된 섬으로, 풍화와 침식 작용 등에 영향으로 다양한 지질의 모습을 이루고 있는 아름다운 화산섬이다. 화산 폭발은 제주에 있어 독특한 지질형상이 존재하게 되는 배경이 되었다. 최근, 제주해안 지질 형상은 문화적으로 그 가치를 인정받고 있으며, 이와 관련한 다양한 연구가 이루어지고 있다. 이런 상황에서 도자 영역의 활용성을보면 해안 지질의 질감 표현을 구멍이 있는 현무암의 표면 질감으로만 이해하고 있다. 도자표현에 있어 지질 표면 질감표현을 단순히 반복적 형태로 찍어내어 단면적인 이미지로 표현하고있다. 이와 같은 점은 제주특성 표현의 다양성을 이루지 못하고 있는 원인으로 작용하고 있다. 따라서 본 연구는 제주 해안에 분포하고 있는 해안 지질이란 범위를 설정하고 다음과 같은 과정을 거쳐 표면질감(Texture)을 활용한 세라믹 패턴을 개발하여 제시하였다. 연구과정은 우선, 제주 생성환경에 대한 고찰을 바탕으로 본 연구에 활용할 지질 표면질감을선정하여 질감을 찍어내는 과정을 거쳤다. 제주 해안 지질 표면 질감은 대체로 기공 형상의 강한 질감이 대부분이었고 일부에서 기공이 작고 표면의 매끄러운 질감을 발견 할 수 있었다. 둘째, 찍어낸 표면질감을 석고작업과정을 통해 1차 패턴 개발을 진행하였다. 셋째, 1차 개발한 패턴을 다양하게 재조합하는 과정으로 새로운 세라믹 패턴개발을 진행하여6개의 패턴을 제시하였다. 이 과정에서 응결속도와 기공 형상에 따른 다양한 표면질감의 강함과 약함으로 분류하여 재조합함으로서 향후, 패턴 활용성을 고려하여 진행하였다. 또한 질감의대비와 배치 등에 의해 해안표면 질감 자체만 가지고 세라믹 패턴 개발이 가능하다는 결과를도출할 수 있었다. 넷째, 개발한 세라믹 패턴을 이용하여 실제 도예작용에 적용시켜봄으로서 패턴 개발을 통한도예 작업 표현의 새로운 가능성을 제시하였다. 제주 해안 지질 표면질감을 활용하여 세라믹 패턴을 개발한 본 연구는 지질 표면 질감(Texture)만으로 세라믹 패턴 개발이 가능하다는 것을 밝힌 점, 개발한 세라믹 패턴으로 제주적인 특수성을 보여준 점, 개발 패턴의 다양한 조합과 변형을 통해 도예표현의 다양성을 모색한점이 본 연구의 성과이다.

The Innovative Application of Surface Texture in Fashion and Textile Design

Lin Gong,신주영 한국의류산업학회 2013 한국의류산업학회지 Vol.15 No.3

This study focuses on ‘texture’ as one of the most important fashion and textile design elements; in addition,it proposes various applications of it. Surface texture is indispensable in fashion and textile design that also factors heavily into innovative creations. Along with technological advances in the fashion industry, surface texture has derived many new and attractive features that provide more opportunities for designers to show various design concepts. Rather than the surface quality of fabrics, surface texture in fashion design creates its identity through a manipulation of materials- an application that tends to be primarily for visual effects without being restricted to decorative purposes. The status and significance of surface texture in various creative fields is explored and the evolution of surface texture is traced by analyzing a number of fashion design cases with representative surface textures. The latest feature of surface texture in fashion and textile design is identified to establish a new classification of surface texture with five groups and technical suggestions. This study provides a theoretical basis for this field of study and a new framework that can be employed in the development of surface textures that use innovative techniques as well as the future application of newly-developed textures.

A Diffusion Filter for Discontinuous Surface Measured by High Definition Metrology

Meng Wang,Yi-Ping Shao,Shi-Chang Du,Li-feng Xi 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.

High definition metrology can measure three-dimensional surface topography of discontinuous surfaces that have holes and grooves with large field of field and high lateral resolution. However, when separating discontinuous surfaces in to various scale-limited surface such as form, waviness and roughness, filtering techniques such as Gaussian filters cause “boundary distortion problems. This is because the discontinuous surfaces do not have large enough continuous evaluation area for Gaussian filtering. Therefore, this research proposes a modified anisotropic diffusion filter, which is formulated in terms of heat diffusion, to separate discontinuous surfaces into various scale-limited surfaces. An edge detector is proposed to ensure that the diffusion process only takes place inside the surface but not blur the surface boundaries. In addition, the diffusion time is specified considering the linkage with the cutoff wavelength of Gaussian filters. The performance of the proposed filter is validated by simulated and practical discontinuous surfaces. Moreover, the three dimensional areal surface texture features specified in ISO 25178 can be evaluated from the filtered scale-limited surfaces. Results have demonstrated that the proposed approach is an effective tool for separating and evaluating areal surface texture for discontinuous surfaces regardless of the continuity of the evaluation surface.

Performance of honed Surface profiles to Artificial Hip Joints: An Experimental Investigation

Dipankar Choudhury,Robert Walker,Taposh Roy,Sweety Paul,Rajshree Mootanah 한국정밀공학회 2013 International Journal of Precision Engineering and Vol. No.

Surface texture technique increases the tribological capability and performance of bearing surfaces. This technology has a number of applications, including car engines and golf balls. However, the use of texture surface in artificial hip joints has not been adequately explored. The aim of the study is to investigate the effects of plateau honed surfaces on the tribological performance of metal-on-metal hip joints. Four sets of different plateau honed surfaces and a set of non-textured surface were investigated on a friction simulator with a lubricant having similar viscosity of pseudo-synovial fluid. The results showed 50% and 38% reductions in static and dynamic friction coefficient, respectively, for a honed surface (honed surface 3) compared with those of a non-textured surface after 1 million cycles. There was a number of wear signs, including adhesive and fatigue wear in all of the experimental surfaces. Nevertheless, the wear signs in the honed surface 3 were minor. Lubrication film thickness was thicker, and third body abrasive wear assumed to reduce in the honed surface since wear debris removed through honed channel. Therefore, the performance of a well-designed plateau-honed surface is significant in tribological aspects of metal-on-metal hip joints.

윤활영역에서 멀티크기 Laser Surface Texturing 효과

김종형(Jong-Hyoung Kim),최시근(Si Geun Choi),다윗제네베세구(Dawit Zenebe Segu),정용섭(Yong-Sub Jung),김석삼(Seock-Sam Kim) 한국트라이볼로지학회 2014 한국트라이볼로지학회지 (Tribol. Lubr.) Vol.30 No.1

Laser Surface Texturing(LST) is a surface engineering process used to improve tribological characteristics of materials by creating patterned microstructures on the mechanical contact surface. In LST technology, a pulsated laser beam is used to create arranged dimples on a surface by a material ablation process, which can improve such as load capacity, wear resistances, lubrication lifetime, and reduce friction coefficients. In the present study, the effect of multi-scale LST on lubricant regime was investigated. A pulsed Nd:YAG laser was applied on the bearing steel(AISI 52100) to create arranged dimples. To optimize the surface texturing effect on friction, multi-scale texture dimples with some specific formula arrays were fabricated by combining circles, ellipses and the laser ablation process. The tribological testing of multi-scale textured surface was performed by a flat-on-flat unidirectional tribometer under lubrication and the results compared with that of the non-textured surface. Through an increase in sliding speed, the beneficial effect of multi-scale LST performance was achieved. The multi-scale textured surface had lower friction coefficient performances than the non-textured surface due to the hydrodynamic lubrication effect.

폐플라스틱 소재의 표면 질감 변화를 활용한 작품 연구

손동훈,장성연 한국디자인학회 2023 Design Works Vol.6 No.2

Plastic is a representative material of the industrial era, is easy to mass-produce, and has become a newopportunity for designers, especially in new forms of research with various molding methods. The purpose of this research is to study plastic materials that give designers freedom of shape in terms of surface texture and to discover aesthetics of texture that have not been seen in plastic materials so far by using handcrafted methods. For studying new surface textures of plastics, first, this research reviewed eco-friendly terms used in the design field, and considered changes in perception of this kind of issue. Second, case studies of design works, which have various types of waste plastics and aesthetic values as compared with mass production products, will be helpful to differentiate from existing works. Third, this research did not intentionally define a certain shape, but conducted an aesthetic interpretation that stimulates the tactile sense from changes in surface texture and volume. In this process, the surface expanded and twisted when waste plastic flakes changed to liquid over fumigation. This researcher was also inspired by the swelling of toppings when baking pizza in the oven, discovering new aesthetic possibilities of surface texture. Finally, a form and functional exploration that can reveal the characteristics of the texture were conducted, and through this, design products useful for everyday life was proposed. This research is meaningful in that it studies the aesthetics of the surface texture resulting from changes in the chemical state of the material, unlike the previous surface texture of artworks developed from waste plastic. 폐플라플라스틱은 산업화 시대를 대표하는 소재로 대량생산이 용이하고 다양한 성형 방법으로 디자이너에게 특히 새로운 형태의 연구에 있어 새로운 기회가 되었다. 본 작품 연구는 디자이너에게 형태적 자유를 선사했던 플라스틱 소재를 표면 질감의 측 면에서 연구하고 대량생산 방식이 아닌 수공예적 방식을 사용함으로써 그동안 플라스틱 소재에서 보지 못했던 질감의 심미성을 발견하는 것을 목적으로 한다. 플라스틱의 새로운 표면 질감을 연구하기 위한 방법으로 첫째, 디자인 분야에서 사용되는 친환경 관련 용어에 대한 정의를 살펴보고 이에 따른 인식 변화와 작품이 지향해야 하는 방향성에 대하여 고찰한다. 둘째, 대량 생산설비를 통한 기업의 사례와 달리 수집하는 폐플라스틱의 종류가 다양하고 조형적 해석이 돋보이는 개인 디자이너의 작품 사례들을 통해 기존 작품과의 차별화 방안에 대하여 살펴본다. 셋째, 의도적으로 형태를 정의하는 것이 아닌 표면 질감과 부피의 변화로부터 나타나는 심미성을 탐구한다. 이 과정에서 폐플라스틱 가루가 훈증 시간에 따라 액체 상태로 변하는 과정에서 표면이 부풀고 뒤틀리는 현상이 있었고 본 연구자는 오븐에 피자를 구울때 토핑이 부푸는 모습을 떠올리 며 영감을 받아 표면 질감의 새로운 심미적 가능성을 발견하였다. 마지막으로 질감의 특징을 드러낼 수 있는 형태와 기능적인 탐구를 하였고 이를 통해 일상생활에 유용한 디자인 제품을 제안하였다. 본 작품 연구는 기존의 작품들이 수집된 폐플라스틱 종류의 본래 표면 질감을 보여주는 것과 달리 소재의 화학적 상태 변화에 따른 새로운 플라스틱 소재의 표면 질감에 대한 조형적 심미성을 연구했다는 것에 의의가 있다.

Dynamic wetting and heat transfer characteristics of a liquid droplet impinging on heated textured surfaces

Moon, Joo Hyun,Cho, Minhaeng,Lee, Seong Hyuk Elsevier 2016 INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER - Vol.97 No.-

<P><B>Abstract</B></P> <P>This article reports the dynamic wetting behavior during spreading and receding phases and the heat transfer characteristics for impinging droplets on heated textured surfaces. In particular, the present study suggests newly the modified equations of the total thermal energy absorbed by droplet and the cooling effectiveness for textured surfaces with consideration of three different wetting states: non-wetting, partial-wetting and total-wetting states. Captured images by using the high-speed cameras were analyzed to examine the influence of impact Weber number, surface temperature, and texture area fraction. It was found that for the textured surfaces, the maximum contact diameter of impinged droplet decreased owing to decrease in the surface energy. At increased surface temperatures, the maximum contact diameters slightly increased and the maximum recoil diameters decreased because of change in liquid viscosity. For the textured surfaces, the cooling effectiveness increased with the Weber number and its change substantially depended on the wetting state. In case of the total-wetting state, the cooling effectiveness increased with the texture area fraction, because of change in liquid–solid interface area. It shows that the control of wetting state would be important in heat transfer of an impinging droplet on solid surface.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Spreading and receding behaviors were observed for impinging droplets on heated textured surface. </LI> <LI> The effect of texture area fraction, surface temperature, and Weber number were examined. </LI> <LI> In the receding regime, droplets receded faster with the increase in surface temperature. </LI> <LI> A cooling effectiveness model for a textured surface was suggested by considering wetting states. </LI> <LI> The cooling effectiveness decreased with the increase in hydrophobicity. </LI> </UL> </P>