Presentation on theme: "ABS INCLINOMETER CASING TEST REPORT"— Presentation transcript:
1ABS INCLINOMETER CASING TEST REPORT Dong-A Geo van Co.,Ltd
2OUTLINEThis 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 3.0Product introduction & casing damage phenomenonMechanical properties of ABS resin grade by BASF Co.,LtdAnalysis of casing internal structure
3INTRODUCTION Main feature of ABS tubes Site Operation Fig Non-corrosion plastic agentFlexible than Aluminum tubeHigh impact strength and light weightStrong support by 400mm long length couplingSite Operation FigCross-Section(Section “A-A”)AA
4CAUSE OF DAMAGE PHENOMENON ABS inclinometer casing damaged by external force :As the misalignment of borehole and ABS inclinometer casing during installation, it happened bigradial 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 stressApplied loadto install casingsBroken to the axial direction
5ABS RESIN TEST RESULT Mechanical Properties Physical Properties Tensile ModulusStress at YieldStrain at YieldStress at BreakStrain at BreakFlexural ModulusFlexural StrengthFlexural StrainImpact strength notch IzodHardness RockwellCoefficient of friction1ASTM D mm/min50mm/minASTM D mm/min2.8mm/minASTM D256 . ¼″ 23℃ASTM D256 . ¼″ 0/－30℃ASTM D785 . RASTM D2240MPA%㎜J/m21506211.0265236/119110.0Physical PropertiesSpecific gravityMelt flow rateWater absorptionASTM D792ASTM D ℃ / 38NASTM D5701.07㎤/gmg/10min%1.050Remark) BASF Lab test result
6PROCESSING Processing Properties /Extrusion Min Max Barrel temp. rear Barrel temp. midBarrel temp. frontDie tempInjection pressureHolding pressureBack pressureMold shrinkageMold temperatureRecommended drying timeMaterial drying tempScrew Speed0.0077270℃Bar㎝/㎝×10-³hrrpmASTM D955Remark) BASF Lab test result
7PRODUCT ANALYSIS <tube cross-section> Specimen : Outer Diameter Φ70, Thickness 4.0 mm ABS Inclinometer CasingAnalysis 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 ToolModeler :Hyper Mesh Ver 3.0Analysis Code : ABAQUS/Standard Ver 5.8Applied force<tube cross-section><1/4 specimen section>
8ANALYSIS RESULT I Deformation Shape Before deformation (Red color)After deformationInput pressure : 16 barMax Deformation : 0.3 mm
9VON-MISES Stress Distribution ANALYSIS RESULT IIVON-MISES Stress DistributionStress concentration AreaInput pressure : 16 barMax Stress : 4.78 kgf/mm2
10Deformation - Stress Curve ANALYSIS RESULT IIIDeformation - Stress CurveStressconcentration(kgf/mm2)( X axial deformation in maximum deformation area)
11ANALYSIS RESULT IV VON MISES STRESS (kg/cm2) This graph shows maximum stress to the casing in the interval of 3bars.
12CONCLUSIONThis 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 grademade of balanced properties having high strength, modulus, and durability.Therefore the end user has to consider optimized installation way before use.