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Presentation on theme: "ABS INCLINOMETER CASING TEST REPORT"— Presentation transcript:

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

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)

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.


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