On the Stress Responses in Butt Joint under Izod Impact Testing

2014 ◽  
Vol 488-489 ◽  
pp. 542-545 ◽  
Author(s):  
Min You ◽  
Kai Liu ◽  
Xiang Li ◽  
Ling Wu ◽  
Mei Li
Keyword(s):  
Stress Responses ◽  
Equivalent Stress ◽  
Adhesive Layer ◽  
Butt Joint ◽  
Impact Testing ◽  
The Finite Element Method ◽  
Adhesively Bonded ◽  
Izod Impact ◽  
The Impact ◽  
Peak Value

The response of the equivalent stress (Seqv) in adhesively bonded steel butt joint and the adhesive bondline during Izod impact test is studied using the finite element method (FEM) software ANSYS. The results obtained show that the highest value of the stressSeqvalmost higher than the yield strength of the adherend reached within about 0.1 ms. The contour diagram of the stressSeqvis symmetrical to the axis along the half height of the specimen both in whole adhesively bonded steel butt joint and the adhesive layer. The peak value of theSeqvin adhesive increases first and then decreased when the action of the impact was over. The stressSeqvin both ends of the specimen kept to a relative lower value during impact procedure.

Numerical Analysis of Impact Velocity on the Responses of Adhesively Bonded Steel Butt Joint with Material Properties

2013 ◽  
Vol 644 ◽  
pp. 193-196 ◽  
Author(s):  
Min You ◽  
Kai Liu ◽  
Hai Zhou Yu ◽  
Ling Wu ◽  
Mei Li
Keyword(s):  
Impact Velocity ◽  
Material Properties ◽  
Impact Test ◽  
Failure Time ◽  
Butt Joint ◽  
The Finite Element Method ◽  
Adhesively Bonded ◽  
Izod Impact ◽  
The Impact ◽  
Peak Value

The effect of the impact velocity on the responses of the adhesively bonded steel butt joint during Izod impact test and the failure procedure is studied using the finite element method software ABAQUS. The results obtained show that the failure time of the element becomes little shorter when the impact velocity increased from 3.2 m/s to 10.2 m/s. The peak value of the Seqv in element 1 increases first and then decreased when the impact velocity reached 4.2 m/s. When the impact velocity is higher than 6.2 m/s, the peak value of the Seqv increased again as the impact velocity increased until 10.2 m/s. It is recommended that the impact velocity of 3.2 m/s or 5.2 m/s is suitable for Izod impact test for the adhesively bonded steel butt joint.

Effect of Notch Depth on the Butt-Joint under Izod Impact Test with Material Properties and Mechanics Analysis

2013 ◽  
Vol 644 ◽  
pp. 197-200 ◽  
Author(s):  
Xiao Ling Zheng ◽  
Mei Li ◽  
Min You ◽  
Wen Jun Liu ◽  
Kai Liu
Keyword(s):  
Impact Test ◽  
Impact Load ◽  
Peak Stress ◽  
Butt Joint ◽  
Notch Depth ◽  
The Finite Element Method ◽  
Adhesively Bonded ◽  
Izod Impact ◽  
Depth Increase ◽  
The Impact

The effect of the notch depth on the impact toughness of the adhesively bonded steel butt joint under Izod impact test is studied using both the finite element method and experimental method. The results obtained from numerical simulation showed that the response time with the peak stress Seqv occurred becomes little longer when the notch depth increased from 2 mm to 8 mm. And a negative longitudinal stress occurred when there is an 8 mm depth notch which might be beneficial to subject impact load. The results from the experiments showed that the effect of notch depth is evidently on the Izod impact properties. The impact energy absorbed by unit area of joint is increased as the notch depth increase

Numerical Analysis on the Butt-Joint under Izod Impact Test

2012 ◽  
Vol 602-604 ◽  
pp. 2279-2282 ◽  
Author(s):  
Xiao Ling Zheng ◽  
Ling Wu ◽  
Min You ◽  
Kai Liu ◽  
Mei Li
Keyword(s):  
Impact Test ◽  
Failure Time ◽  
Impact Load ◽  
Adhesive Layer ◽  
Peak Stress ◽  
Butt Joint ◽  
Adhesively Bonded ◽  
Adhesive Thickness ◽  
Izod Impact ◽  
The Impact

The effect of the adhesive thickness on the impact toughness of the adhesively bonded steel butt joint during Izod impact test and the failure procedure is studied using the finite element method software ABAQUS. The results obtained show that the time with the peak stress Seqv occurred is corresponding to the element failure. And much higher peak stress might be subjected by the element near the bottom of the joint under impact load. The failure time of the element becomes little longer when the adhesive layer thickness increased from 0.1 mm to 0.4 mm. But the peak value of the Seqv decreases and the damage limit of the strain increased evidently as the adhesive thickness increased from 0.2 mm to 0.4 mm.

Effect of Notch Depth on the Adhesively Bonded Steel Butt-Joint under Charpy Impact Test

2014 ◽  
Vol 488-489 ◽  
pp. 538-541 ◽  
Author(s):  
Min You ◽  
Mei Li ◽  
Jian Li Li ◽  
Kai Liu ◽  
Ya Lan Zhao
Keyword(s):  
Impact Test ◽  
Charpy Impact ◽  
Peak Stress ◽  
Charpy Impact Test ◽  
Butt Joint ◽  
Notch Depth ◽  
The Finite Element Method ◽  
Adhesively Bonded ◽  
Izod Impact ◽  
The Impact

The effect of the notch depth on the impact properties of the adhesively bonded steel butt joint under the Charpy impact test is studied using both the finite element method (FEM) and experimental method. The results obtained from numerical simulation showed that the value of the peak stressSeqvincreased first and then decreased evidently when the notch depth increased from 2 mm to 8 mm. Comparing the results with that from Izod impact test, it is found that the response time retarded about 0.02 ms and the peak value of the stressSeqvdecreased evidently under the Charpy impact test. The results from the experiments showed that the effect of notch depth on the impact energy absorbed by unit area of joint is as same as that from the Izod impact test.

Effect of Shock Temperature on the Impact Toughness of Butt-Joint

2012 ◽  
Vol 602-604 ◽  
pp. 2096-2099
Author(s):  
Min You ◽  
Ling Wu ◽  
Hai Zhou Yu ◽  
Jing Rong Hu ◽  
Mei Li
Keyword(s):  
Impact Toughness ◽  
Impact Test ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Butt Joint ◽  
Adhesively Bonded ◽  
A Value ◽  
Shock Temperature ◽  
Izod Impact ◽  
The Impact

The effect of the shock temperature and time on the impact toughness of the adhesively bonded steel butt joint under Charpy or Izod impact test is studied using the experimental method. The results obtained show that the impact toughness decreases when the shock temperature increased. When the curing time, temperature as well as the open assembly time was set as constant, the higher the shock temperature is, the lower the impact toughness of the joint. Comparing to the Charpy impact test, the Izod impact test is more sensitive to the shock temperature. When the shock temperature is set at a value not less than 300 C, the impact toughness measured is nearly the same as zero due to decomposition, carbonization and volatilization of the adhesive.

Effect of Adhesive Thickness on the Impact Toughness of Butt-Joints

2011 ◽  
Vol 230-232 ◽  
pp. 1350-1354 ◽  
Author(s):  
Min You ◽  
Jing Rong Hu ◽  
Xiao Ling Zheng ◽  
Ai Ping He ◽  
Cun Jun Chen
Keyword(s):  
Impact Toughness ◽  
Adhesive Layer ◽  
Curing Temperature ◽  
Curing Time ◽  
Optimum Thickness ◽  
Adhesively Bonded ◽  
Butt Joints ◽  
Notched Specimen ◽  
Adhesive Thickness ◽  
The Impact

The effect of the adhesive thickness on the impact toughness of the adhesively bonded steel joint under impact loading is studied using the experimental method. The results obtained show that the impact toughness increases when the adhesive thickness increased then it decrease as the adhesive thickness increase. When the curing time is set as a constant, the higher the curing temperature is, the lower the impact toughness of the joint. The optimum thickness of the adhesive layer for the specimen of impact toughness test cured at 60 C for 1 h is 0.6 mm and it is 0.4 mm to 0.6 mm for the specimen cured 1 h at temperature of 90 C or higher than it. It is recommended using the notched specimen to decrease the testing deviation.

scholarly journals Viscoelastic Analysis of Adhesively Bonded Joints

1981 ◽  
Vol 48 (2) ◽  
pp. 331-338 ◽  
Author(s):  
F. Delale ◽  
F. Erdogan
Keyword(s):  
Adhesive Layer ◽  
Shear Loading ◽  
Bonded Joints ◽  
Lap Joint ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints ◽  
Viscoelastic Analysis ◽  
Laplace Transform Technique ◽  
External Loads ◽  
Peak Value

In this paper an adhesively bonded lap joint is analyzed by assuming that the adherends are elastic and the adhesive is linearly viscoelastic. After formulating the general problem a specific example for two identical adherends bonded through a three parameter viscoelastic solid adhesive is considered. The standard Laplace transform technique is used to solve the problem. The stress distribution in the adhesive layer is calculated for three different external loads namely, membrane loading, bending, and transverse shear loading. The results indicate that the peak value of the normal stress in the adhesive is not only consistently higher than the corresponding shear stress but also decays slower.

scholarly journals A Modified U-Shaped Micro-Actuator with a Compliant Mechanism Applied to a Microgripper

Actuators ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 28 ◽  
Author(s):  
Pedro Vargas-Chable ◽  
Margarita Tecpoyotl-Torres ◽  
Ramon Cabello-Ruiz ◽  
Jose Rodriguez-Ramirez ◽  
Rafael Vargas-Bernal
Keyword(s):  
Stress Reduction ◽  
Room Temperature ◽  
Compliant Mechanisms ◽  
Compliant Mechanism ◽  
Equivalent Stress ◽  
Performance Parameters ◽  
The Finite Element Method ◽  
Micro Actuator ◽  
The Impact ◽  
Ansys Workbench

In this paper, a modified U-shaped micro-actuator with a compliant mechanism is proposed. It was analyzed with a uniform and modified thin arm, as well as a similar variation in the corresponding flexure, in order to observe the impact of the compliant lumped mechanism. The use of these compliant mechanisms implies an increment in the deformation and a reduction in the equivalent stress of 25% and 52.25%, respectively. This characterization was developed using the Finite Element Method (FEM) in ANSYS Workbench. The design, analysis and simulation were developed with Polysilicon. In this study, the following performance parameters were also analyzed: force and temperature distribution. This device is supplied with voltage from 0 V up to 3 V, at room temperature. The modified U-shaped actuator was applied in both arms of a microgripper, and to evaluate its electrothermal performance, a static structural analysis has been carried out in Ansys Workbench. The microgripper has an increment in deformation of 22.33%, an equivalent stress reduction of 50%, and a decrease in operation frequency of 10.8%. The force between its jaws is of 367 µN. This low level of force could be useful when sensitive particles are manipulated.

Numerical Analysis of the Stress in Joggle Double Lap Joint

2012 ◽  
Vol 511 ◽  
pp. 150-153
Author(s):  
Xiao Ling Zheng ◽  
Ling Wu ◽  
Min You ◽  
Kai Liu ◽  
Cun Jun Chen
Keyword(s):  
Stress Distribution ◽  
Equivalent Stress ◽  
Peak Stress ◽  
Middle Part ◽  
Lap Joints ◽  
Lap Joint ◽  
The Finite Element Method ◽  
Adhesively Bonded ◽  
Von Mises Equivalent Stress ◽  
Von Mises

Both normal and joggle double lap joints were numerical analyzed to get the stress distribution in mid-bondline and in adherends near the interface using the finite element method (FEM). The results from the numerical simulation show that nearly all the peak values of the stress components as well as the von Mises equivalent stress distributed in both mid-bondline and adherend near the interface of the adhesively bonded joggle double lap joint are significantly decreased to the normal one. It was pointed out that the load bearing capacity of the joggle double lap joint may be higher than that of the double lap joint for its decrease of peak stress, much evenly stress distribution in the middle part of the overlap zone so that more load can be subjected by the joggle double lap joint.

Effect of Primer's Elastic Modulus on the Response of Multi Layer Bonded Steel Butt Joint under Izod Impact Test

2017 ◽  
Vol 904 ◽  
pp. 68-71 ◽  
Author(s):  
Jian Li Li ◽  
Ya Lan Zhao ◽  
Ying Ying Li ◽  
Min You
Keyword(s):  
Elastic Modulus ◽  
Elastic Strain ◽  
Impact Test ◽  
Lower Surface ◽  
Butt Joint ◽  
Impact Response ◽  
Absolute Value ◽  
Epoxy Adhesives ◽  
Izod Impact ◽  
The Impact

The effect of the elastic modulus of the adhesive for primer on the impact response of the steel butt joint bonded by multi-layer under the Izod impact test is investigated using the elasto-plastic finite element method (FEM). The results obtained from numerical simulation show that both the elastic strain and plastic strain occurred at the point 0.5 mm away from the upper or lower surface after a certain time is increased significantly when the elastic modulus of the primer is decreased from 2.875 GPa to 0.825 GPa. The absolute value of the stress Sx response at these to nodes is decreased when the elastic modulus of the primer is decreased. The value of the stress Seqv is the highest one after 0.1 ms at the points 0.5 mm away from the upper or lower surface when the butt joint is bonded by the multi layer consisted of Epoxy-Phenolic-Epoxy adhesives.

Sign in / Sign up

Export Citation Format

Share Document