1. ABS INCLINOMETER CASING TEST REPORT
Dong-A Geo van Co.,Ltd

2. OUTLINE
This test report for ABS Inclinometer casing which is to measure ground movement or to detect stability during buildings confines a summary observation and super computerizing by analysis tool, Model Hyper Mesh Version 3.0
Product introduction & casing damage phenomenon
Mechanical properties of ABS resin grade by BASF Co.,Ltd
Analysis of casing internal structure

3. INTRODUCTION Main feature of ABS tubes Site Operation Fig
Non-corrosion plastic agent
Flexible than Aluminum tube
High impact strength and light weight
Strong support by 400mm long length coupling
Site Operation Fig
Cross-Section
(Section “A-A”) A A

4. CAUSE OF DAMAGE PHENOMENON
ABS inclinometer casing damaged by external force :
As the misalignment of borehole and ABS inclinometer casing during installation, it happened big
radial stress to the casing. Sometimes soft soil layer (ex, silt or sand) would affect lateral movement excessively.
ABS inclinometer casing damaged by axial force :
Due to too much load to the top edge part of casing , The casing would be broken by axial direction.
Broken by external stress
Applied load
to install casings
Broken to the axial direction

5. ABS RESIN TEST RESULT Mechanical Properties Physical Properties
Tensile Modulus
Stress at Yield
Strain at Yield
Stress at Break
Strain at Break
Flexural Modulus
Flexural Strength
Flexural Strain
Impact strength notch Izod
Hardness Rockwell
Coefficient of friction1
ASTM D mm/min
50mm/min
ASTM D mm/min
2.8mm/min
ASTM D256 . ¼″ 23℃
ASTM D256 . ¼″ 0/－30℃
ASTM D785 . R
ASTM D2240
MPA % ㎜
J/m
2150 62
11.0
265
236/119
110.0
Physical Properties
Specific gravity
Melt flow rate
Water absorption
ASTM D792
ASTM D ℃ / 38N
ASTM D570
1.07
㎤/gm
g/10min %
1.050
Remark) BASF Lab test result

6. PROCESSING Processing Properties /Extrusion Min Max Barrel temp. rear
Barrel temp. mid
Barrel temp. front
Die temp
Injection pressure
Holding pressure
Back pressure
Mold shrinkage
Mold temperature
Recommended drying time
Material drying temp
Screw Speed
0.0077 2 70 ℃
Bar
㎝/㎝×10-³ hr
rpm
ASTM D955
Remark) BASF Lab test result

7. PRODUCT ANALYSIS <tube cross-section>
Specimen : Outer Diameter Φ70, Thickness 4.0 mm ABS Inclinometer Casing
Analysis model : The cross-section of casing is symmetry.
To record data after applied force equally to the 1/4 casing section. Refer to below Fig.
Applied force : External distribution force from 3bars ~ 16 bars to 1/4 casing section.
Evaluation : Checked maximum endurance break point of casing wall when the applied force being given.
Analysis Tool
Modeler :Hyper Mesh Ver 3.0
Analysis Code : ABAQUS/Standard Ver 5.8
Applied force
<tube cross-section>
<1/4 specimen section>

8. ANALYSIS RESULT I Deformation Shape Before deformation
(Red color)
After deformation
Input pressure : 16 bar
Max Deformation : 0.3 mm

9. VON-MISES Stress Distribution
ANALYSIS RESULT II
VON-MISES Stress Distribution
Stress concentration Area
Input pressure : 16 bar
Max Stress : 4.78 kgf/mm2

10. Deformation - Stress Curve
ANALYSIS RESULT III
Deformation - Stress Curve
Stress
concentration
(kgf/mm2)
( X axial deformation in maximum deformation area)

11. ANALYSIS RESULT IV VON MISES STRESS (kg/cm2)
This graph shows maximum stress to the casing in the interval of 3bars.

12. CONCLUSION
This report is to write maximum endurance break point of casing wall when the applied force being given under same conditions.
→ ABS inclinometer casing made by BASF Resin grade in case of outer diameter Φ70, wall thickness 4.0 mm could endure maximum load up to 640kgf.
Top edge of ABS inclinometer casing damaged to the axial direction is not common but we may guess below ;
As strain at break at normal temperature is 11 %, ABS resin itself has no influence on casing damage.
However it would sometimes results from unusual stress concentration at rib area and weak molecular union during work under high temperature and low pressure.
The basic chemical resin of ABS inclinometer casing are robust since high modulus of BASF grade
made of balanced properties having high strength, modulus, and durability.
Therefore the end user has to consider optimized installation way before use.