Assignment 4
Objective:
The Objective of this study is to compare different simulation with different material criteria in Hypermesh.
Case 1: Law2 Eps Max
In this type the material fracture or elements deletion occurs when the total plastic strain(Eps) reaches certain value.
Displacement Observation:
Displacement of 15.8mm is recorded.
Von-mises Stress Observations:
The maximum stress of 70 is recorded which is low because element is ruptured early.
Plastic Strain Observation:
The element is set to be deleted at 0.151 plastic strain. So, max recorded strain is 0.149.
Rigid wall Forces Observation:
The Rigid wall force is about 8000N
Energy Plot Observation:
The total energy is about 25000.
Case 2: Law2 Eps Max Crack (IXFEM FORMULATION)
In this type material elements get cracked. So this is more advanced and accurate that previous method of analysis.
In the below pic it is clear that the element is getting cracked.
Von-mises Stress Observations:
The maximum stress of 290 is recorded which is very high than previous case.
Plastic Strain Observation:
The element is set to be deleted at 0.151 plastic strain. So, max recorded strain is 0.150.
Rigid wall Forces Observation:
The Rigid wall force is about 8000N
Energy Plot Observation:
The total energy is about 30000 which is more than previous case
Case 3: Law2 (no failure card)
In this type the faliure card is deleted.
Von-mises Stress Observations:
The maximum stress of 70 is recorded which is lesser than previous case.
Plastic Strain Observation:
The element is set to be deleted at 0.151 plastic strain. So, max recorded strain is 0.150.
Rigid wall Forces Observation:
The Rigid wall force is about 8000N
Energy Plot Observation:
The total energy is about 27000 which is lesser than previous case
Case 4: Law2 (no failure card, No eps max )
In this type the faliure card is deleted and also plastic failure value is set default.
Von-mises Stress Observations:
The maximum stress of 290 is recorded which is lesser than previous case.
Plastic Strain Observation:
the max plastic strain in 0.29.
Rigid wall Forces Observation:
The Rigid wall force is about 8000N
Energy Plot Observation:
The total energy is about 37000 which is lesser than previous case
Case 5: Law1 (Elastic )
In this type the Law1 elastic type is used.
Von-mises Stress Observations:
The maximum stress of 11020 is recorded which is unrealistic.
Plastic Strain Observation:
No plastic strain in observed.
Rigid wall Forces Observation:
The Rigid wall force keeps on increasing with time.
Energy Plot Observation:
The total energy keeps on increasing with time.
Case 6: Law27 (brittle)
In this type the Law27 is used which is used for brittle type of material.
Von-mises Stress Observations:
The maximum stress of 270 is recorded.
Plastic Strain Observation:
Max plastic strain of 0.26 is observed.
Rigid wall Forces Observation:
the max rigid wall force is 8000.
Energy Plot Observation:
the total energy is more that 30000
Case 7: Law36
In this type the Law36 is used with given test input.
Von-mises Stress Observations:
Max stress of 839 is observed
Plastic Strain Observation:
Max plastic strain of 0.136 is observed.
Rigid wall Forces Observation:
The Rigid wall force is more than 17000
Energy Plot Observation:
The total energy is more that 45000.
Conclusion:
Thus different cases of material is analysed using hypermesh.