1.4 Measured data: Diameter of specimen's cross-section

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TRENGTH OF ATERIALS – M L ABORATORY

AGH University of Science and Technology Faculty...

Chair of Strength, Fatigue Year...Group...

of Material and Construction Date...Mark...

Name...

Laboratory …...

Identification of mechanical properties of materials PART I – tensile and compression tests

Report

1. Tensile test in ambient temperature (according to PN-EN 10002-1:2002)

1.1 Examined material, properties:... E=... MPa 1.2 Shape and type of a specimen (Fig. 1.1):...

1.3 Testing machine, range:...

1.4 Measured data:

Diameter of specimen's cross-section... d0=... mm Initial area of cross-section... S₀=d₀²

4 =... mm² Diameter at maximum force... ^dm=... mm Cross-section area at maximum force... S_m=πd_m²

4 =... mm² Diameter after fracture... du=... mm Cross-section area after fracture... S_u=d_u²

4 =... mm² Initial gauge length... ^L0=... mm Gauge length after fracture... Lu=... mm Initial distance between markings on longer part of specimen... ^L0'=... mm Distance between markings on longer part of specimen after fracture. Lu'=... mm Force corresponding to lower yield stress... ^FeL=... kN Force corresponding to upper yield stress... FeH=... kN Maximum force... ^Fm=... kN Rupture force... Fu=... kN 1.5 Strength properties of the material

Lower yield stress... R_eL=F_eL

S₀ =...=... MPa Upper yield stress... R_eH=F_eH

S₀ =...=... MPa 1

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Tensile strength... R_m=F_m S0

=...=... MPa True stress at max. force... σ_m=F_m

S_m=...=... MPa True strain at max. force... ε_m=ln S₀

S_m⋅100 %=...%

Nominal (engineering) stress at rupture... F_u

S₀=...=... MPa Rupture stress (true stress)... σu=R_t=F_u

S_u=...=... MPa True strain at rupture... ε_u=ln S₀

Su

⋅100 %=... %

Total percentage elongation at max. force... A_gt=^{Lu'− LL0' 0'REm}^⋅100 %=... % Percentage elongation after fracture... A_ft=L_u−L₀

L₀ ⋅100 %=... % Total percentage elongation... A_t=A_ftR_t

E⋅100 %=... % Percentage lateral contraction of the cross-section ... Z =S₀−S_u

S₀ ⋅100 %=... %

Fig. 1.1 – Sketch of a specimen with main dimensions

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Fig. 1.2 – Stress-strain curve

engineering stress-strain curve – continuous line _______________

true stress-strain curve – dashed line _ _ _ _ _ _ _

2. Compression test of ceramic materials (gypsum specimen, according to PN-86/B-4360) 2.1 Examined material, properties...

2.2 Shape of a specimen (Fig. 2.1)...

Fig. 2.1 – Specimen shape and dimensions 3

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2.3 Testing machine, range...

2.4 Measured data

Initial diameter of the specimen... d0=... mm Initial height of the specimen... ^h0=... mm Initial cross-section area... S₀=d₀²

4 =... mm² Rupture force... P=... kN Compression strength... Rs=P

S₀=... MPa

Fig. 2.2 – Stress-strain curve

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