Effect of the displacement rate and inclination angle in steel fiber pullout tests

This paper summarizes the results obtained in an experimental campaign on the effect of the displacement pullout rate and the inclination angle of the steel fiber pullout tests. For that purpose, specimens were obtained from a self-compacting concrete with a compressive strength of 86 MPa. In the experimental program, hooked-end steel fibers of 0.75 mm diameter and 60 mm length were used. Tests were executed with both hooked-end fibers, and smooth fibers obtained from the former by cutting the hooked end. For both type of fibers, their embedment length into concrete was 20 mm, and the influence of fiber inclination angle toward the load direction was investigated by adopting values of 0∘, 30∘ and 60∘. The tests were performed at displacement rates of 0.01, 0.1 and 1 mm/s. The results have shown that the peak pullout load increased with the inclination angle, in particular for the smooth series. Furthermore, higher displacement rates led to a higher energy absorption capacity for the pullout of the smooth fibers, while the energy absorption remained almost stable for hooked-end fibers.project BIA2015-68678-C2-1-R. M. Tarifa appreciates the financial support from the Department of Applied Mechanics and Project Engineering, UCLM (2018), and from the Programa propio de I+D+i de la Universidad Politécnica de Madrid para realizar estancias de investigación internacional igual o superior a un mes (2019), to do two stays at the University of Minho, Guimarães, Portugal. E. Poveda acknowledges the funding from the International Campus of Excellence CYTEMA and the University of Castilla-La Mancha, throughout Ayudas para estancias en universidades y centros de investigación en el extranjero en 2019 en el ámbito del plan propio de investigación susceptibles de cofinanciación por el Fondo Europeo de Desarrollo Regional (FEDER), Programa 010100021 to fund her stays in the University of Minho during 2018 and 2019, respectively. The authors thank the support of the Department of Civil Engineering and the Laboratory of the Structural Division (LEST), University of Minh

Sebase nevus: 17 olgunun klinikopatolojik ozellikleri

Nevus Sebaceus of Jadassohn is a rare congenital hamartomatous lesion which is usually located on the scalp. Its clinical importance lies mostly in the potential for the development of various secondary neoplasms and its association with 'Nevus sebaceus syndrome'. In this study, we present 17 cases of nevus sebaceus (7,6%) out of 221 cases which were diagnosed as 'Cutaneous adnexal tumor' at the Department of Pathology, Hacettepe University Medical School, between the years 1980-1993. Mean age was 22 years and all lesions were in the head and neck region. Histologic examination of cases were characterized by distribution of three major components; papillomatous hyperplasia, sebaceous glands and apocrine glands. Lost of hair follicles and developmental abnormalities were seen in each case. 3 cases had 5 different secondary neoplasms. The clinical and pathological findings were discussed in the light of literature

Eccrine Spiradenoma of the Thigh: Sonographic Findings And Review of the Literature

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