Preliminary communicationThe paper presents a theoretical model and design solution for the device which determines the modulus of elasticity by bending the material (test samples), instead of the usual stretching. The device was designed, assembled and successfully tested in the laboratory. Experimental determination of the elastic modulus was conducted by measuring the deflection of samples under a constant load. Values of the elastic modulus resulted from theoretical relations. Measurement was performed and measurement errors, i.e. device errors, were analysed. Keywords: deflection; device for determining the modulus of elasticity; elastic modulus; stressOdređivanje modula elastičnosti materijala mjerenjem progiba grede opterećene na savijanje Prethodno priopćenje U radu je dan teorijski model i projektno rješenje uređaja za određivanje modula elastičnosti na osnovi savijanja, a ne istezanja materijala (ispitnih uzoraka) kao što je uobičajeno. Uređaj je projektiran, realiziran i uspješno testiran u laboratoriju. Provedeno je eksperimentaln o određivanje modula elastičnosti mjerenjem vrijednosti progiba ispitivanih uzoraka materijala pri konstantnom opterećenju. Na bazi teorijskih ovisnosti, dolazi se do vrijednosti modula elastičnosti. Provedeno je mjerenje i analizirane su greške mjerenja, odnosno uređaja.
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