ASTM D5045 characterizes the toughness of plastics in terms of the critical-stress-intensity factor, KIc, and the energy per unit area of crack surface or critical strain energy release rate, GIc, at fracture initiation. ASTM D5045 covers single-edge-notch bending (SENB) and compact tension (CT). The property KIc (GIc) determined by ASTM D5045 characterizes the resistance of a material to fracture in a neutral environment in the presence of a sharp crack under severe tensile constraint, such that the state of stress near the crack front approaches plane strain, and the crack-tip plastic (or non-linear viscoelastic) region is small compared with the crack size and specimen dimensions in the constraint direction. A KIc value is believed to represent a lower limiting value of fracture toughness. This value may be used to estimate the relation between failure stress and defect size for a material in service wherein the conditions of high constraint described above would be expected.
By means of our testing expertise and modular product design, we will help find the solution that is right for you. Give our test engineers a call today for help configuring the best test machine and accessories according to your standard.
Recommended Test Machines
Force range of 5 kN to 600 kN (1,125 lbf to 135,000 lbf)
Adjustable test space
The most popular choice for static tension and compression tests
These dual column testers are available in both tabletop and floor standing models
Static and fatigue forces up to 50 kN (11,250 lbf)
Frequency ratings up to 75 Hz
Oil-free, all electric actuator for clean test conditions
Lower purchase, operating, and maintenance costs than hydraulic equivalents
Static and fatigue forces up to 25 kN (5,500 lbf)
Frequency ratings up to 100 Hz
Servohydraulic
Small, portable footprint
Recommended Testing Accessories
Rated from -40°C to 150°C (-40°F to 300°F)
Clevis design
Maximum specimen widths from 12.7 mm to 50.8 mm (0.50 in. to 2.00 in>)
Pin diameters from 12.7 mm to 50.8 mm (0.50 in. to 2.00 in.)
Available from a 1 mm (0.04 in) measurement range to a 25 mm (1.0 in) measurement range
May be used in a wide variety of tests
Includes a magnetic and adjustable mounting base
Standard units meet Class B-1 of ASTM E83, Class 0,5 of ISO 9513
