typical phenomena of creep processes

Description:

• Components that are subjected to long-term constant loads deform plastically.
• This material behaviour is called creep.
• The creep rupture test is a destructive test method for determining the material behaviour (creep) at constant test temperature (room temperature and below) and after prolonged exposure to a constant load.
• The WP 600experimental unit demonstrates typical phenomena such as phases of different creep rates or temperature-dependent creep behaviour.
• The clean layout and simple operation mean the experimental sequence can be observed in all details and phases.
• Lead and plastic specimens are used in order to achieve acceptable creep rates at room temperature.
• Experiments can also be conducted below room temperature by means of a transparent temperature-controlled box with storage elements.
• In the experiment, the specimen is subjected to a constant tensile load at a given, constant temperature.
• The tensile load is generated by a lever and stepped weights.
• The specimen holders are equipped with knife-edge bearings to avoid bending stresses on the specimen.
• An adjustable stop protects the dial gauge at fracture of the specimen and prevents the loads impacting the experimental unit.
• The elongation of the specimen over time is recorded by a dial gauge and a stopwatch and represented in a strain–time diagram as the so-called creep curve.

Technical Details:

Specifications:

• investigation of creep behaviour of different materials in creep rupture test
• constant load on the specimen via lever arm and stepped weights
• flat lead and plastic (PE) specimens
• experiments at or below room temperature are possible
• transparent temperature-controlled box with storage elements for cooling the specimen
• dial gauge for determining the elongation
• stopwatch to record time

Technical Data:

• Specimens:
  • L x W: 25x5mm, thickness 2mm
  • 10x lead
  • 10x plastic (PE)
• Weights:
  • 1x 1N (hanger)
  • 2x 5N
  • 3x 2N
  • 3x 1N
  • 2x 0,5N
  • Measuring ranges:
    • tension: 5…25N/mm²
    • travel: 0…10mm, graduation: 0,01mm
    • temperature: -50…300°C

Dimensions & Weight:

• L x W x H: 700x350x510mm
• Weight: approx. 23kg

Learning Objectives/Experiments:

• creep in specimens of various materials
• record a strain–time diagram (creep curve)
• influence of temperature and load on the creep
• load and recovery in plastics

Scope of Delivery:

• 1 experimental unit
• 1 set of specimens (20 pieces)
• 1 set of weights
• 1 stopwatch
• 1 temperature-controlled box with 2 storage elements and 1 thermometer
• 1 set of instructional material

Features:

• experiments at or below room temperature are possible

Accessories:

• Optional:
• WP 600.01Set of 10 specimens, PE
• WP 600.02Set of 10 specimens, Pb
• WP 300.09Laboratory trolley

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.